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December 2017
NEW POWER
MANAGEMENT
PRODUCTS
LTC2992 Dual Wide Range Power Monitor
LT3964 Dual 36V Synchronous 1.6A Buck LED Driver
with I2C
LTM4651 EN55022B Compliant 58V, 24W Inverting-
Output DC/DC μModule Regulator
LT8362 Low IQ Boost/SEPIC/Inverting Converter with 2A,
60V Switch
LT8650S Dual Channel 4A, 42V, Synchronous Step-Down
Silent Switcher 2 with 6.2μA Quiescent Current
Contents
Ideal Diodes
LTC
®
4418 Dual Channel Prioritized PowerPath™ Controller ................................................................................................................................1
LT
®
8672 Active Rectifier Controller with Reverse Protection ...............................................................................................................................2
Power Monitor
LTC2992 Dual Wide Range Power Monitor .......................................................................................................................................................... 4
LED Drivers
LT3964 Dual 36V Synchronous 1.6A Buck LED Driver with I2C ...........................................................................................................................5
µModule
®
Regulators
LTM
®
4645 25A DC/DC Step-Down µModule Regulator ........................................................................................................................................ 6
LTM4651 EN55022B Compliant 58V, 24W Inverting-Output DC/DC µModule Regulator ..................................................................................... 7
LTM8063 40VIN, 2A Silent Switcher
®
µModule Regulator ....................................................................................................................................9
LTM8065 40VIN, 2.5A Silent Switcher µModule Regulator ................................................................................................................................. 10
Switching Regulators—Monolithic
LT8362 Low IQ Boost/SEPIC/Inverting Converter with 2A, 60V Switch ..............................................................................................................11
LT8603 42V, Low IQ, Quad Output Triple Monolithic Buck Converter and Boost Controller ...............................................................................12
LT8650S Dual Channel 4A, 42V, Synchronous Step-Down Silent Switcher 2 with 6.2µA Quiescent Current ..................................................... 14
Switching Regulators—Controllers
LTC3779 150V VIN and VOUT Synchronous 4-Switch Buck-Boost Controller ......................................................................................................15
LTC3874-1 PolyPhase
®
Step-Down Synchronous Slave Controller with Sub-Milliohm DCR Sensing ................................................................ 16
LT8391A 60V 2MHz Synchronous 4-Switch Buck-Boost LED Driver Controller ................................................................................................17
LT8711 Micropower Synchronous Multitopology Controller with 42V Input Capability .....................................................................................18
Design Notes
DN567 60V 2MHz Buck-Boost Controllers Regulate High Power Voltage and Current with High Efficiency and Low EMI
DN569 Cool Running, 144W, 4 × 40A µModule POL Regulator
All registered trademarks and trademarks are the property of their respective owners.
1
FEATURES DESCRIPTION
Ideal Diodes
n
Selects Highest Priority Supply from Two Inputs
n
Blocks Reverse and Cross Conduction Currents
n
Wide Operating Voltage Range: 2.5V to 40V
n
–42V Protection Against Reverse Connection
n
60V Tolerant V1, V2 Inputs
n
Adjustable Input Validation Time
n
Fast Switchover Minimizes Output Voltage Droop
n
Low 26µA Operating Current
n
±1.5% Input Overvoltage/Undervoltage Protection
n
Adjustable Overvoltage/Undervoltage Hysteresis
n
Cascadable for Additional Input Supplies
n
20-Lead 4mm × 4mm QFN Package
n
Industrial Handheld Instruments
n
High Availability Systems
n
Battery Backup Systems
n
Servers and Computer Peripherals
APPLICATIONS
LTC4418
Dual Channel Prioritized
PowerPath Controller
The LTC4418 connects one of two valid power supplies to a
common output based on priority and validity. Priority is defined
by pin assignment, with V1 assigned the higher priority and V2 the
lower priority. A power supply is defined as valid when its voltage
has been within its overvoltage (OV) and undervoltage (UV) window
continuously for at least the configured validation time. If the highest
priority valid input falls out of the OV/UV window, the channel is
immediately disconnected and the other valid input is connected to
the common output. Multiple LTC4418s, as well as triple channel
LTC4417s, can be cascaded to provide switchover between more
than two inputs.
The LTC4418 incorporates fast non-overlap switching circuitry to
prevent both reverse and cross conduction while minimizing output
droop. The gate driver includes a 6V clamp to protect external
MOSFETs. A controlled soft-start feature minimizes start-up inrush
current. Open drain VALID outputs indicate the input supplies have
been within their OV/UV window for the duration of the validation
time. The validation time can be disabled or adjusted using an
external capacitor.
V2
UV2
OV2
LTC4418
4418 TA01a
VS1 G1 VS2 G2
1M
100nF
60.4k
226k
1M
33.2k
78.7k
470nF BAT46WJ
M3 M4
47nF
698Ω
100k
82µF
1.25A
MAX OUTPUT
V1
UV1
OV1
CAS
INTVCC
EN
SHDN
+
FDS4465
M1 M2
FDS4465
5V SYS
12V WALL
ADAPTER
GND HYS
255k
TMR
1nF 100nF
100k
VALID1
VALID2
VOUT
Priority Switching from V1 to V2
V
OUT
5V
13.8V
2ms/DIV
ILOAD = 1.25A
COUT = 82µF
2V/DIV
2V/DIV
4418 TA01b
UF PACKAGE
20-LEAD (4mm × 4mm) PLASTIC QFN
LTC4418CUF
LTC4418IUF
20 19 18 17 16
6 7 8
TOP VIEW
GND
21
UF PACKAGE
20-LEAD (4mm × 4mm) PLASTIC QFN
9 10
5
4
3
2
1
11
12
13
14
15TMR
UV1
OV1
UV2
OV2
VOUT
VS1
G1
VS2
G2
HYS
SHDN
EN
V1
V2
VALID1
VALID2
GND
CAS
INTV
CC
2
FEATURES DESCRIPTION
n
Reverse Input Protection to –40V
n
Improved Performance Compared to a
Schottky Diode:
n
Reduce Power Dissipation by >90%
n
Reduce Drop to 20mV
n
Ultrafast Transient Response
n
Rectifies 6VP-P Up to 50kHz
n
Rectifies 2VP-P Up to 100kHz
n
Wide Operating Voltage Range: 3V to 42V
n
Low 20µA Quiescent Current in Operation
n
Low 3.5µA Shutdown Current
n
Accurate 1.21V Enable Pin Threshold
n
Available in Small 10-Lead MSOP
n
Automotive Battery Protection
n
Industrial Supplies
n
Portable Instrumentation
The LT8672 is an active rectifier controller for reverse input
protection. It drives an external N-channel MOSFET to replace
a power Schottky diode. Its very low quiescent current and fast
transient response meet the tough requirements in automotive
applications where AC input signals of up to 100kHz are present.
These signals are rectified with minimum power dissipation on the
external FET, simplifying thermal management on the PCB.
With a drop of only 20mV, the LT8672 solution eases the minimum
input voltage requirement during cold crank and start-stop, allowing
simpler and more efficient circuits. If the input power source fails or
is shorted, a fast turn-off minimizes reverse current transients. An
available shutdown mode reduces the quiescent current to 3.5μA.
An integrated auxiliary boost regulator provides the required boost
voltage to turn the external FET fully on. A power good pin signals
when the external FET is ready to take load current.
APPLICATIONS
LT8672
Active Rectier Controller
with Reverse Protection
Ideal Diodes
12V, 5A Automotive Reverse Battery Protection
IPD100N06S4-03
1μF
100μH
SMBJ33A
33V
SMBJ15A
15V
8672 TA01a
VOUT
5A
VBATT
12V
4.7µF
+
470µF
TO SYSTEM LOADS
OFF
ON
SOURCE
GATE
DRAIN
AUXSW
AUX
PG
GND
EN/UVLO
LT8672
Rectification of Input Ripple
VOUT
2V/DIV
500µs/DIV
VBATT
2V/DIV
8672 TA01b
MS PACKAGE
10-LEAD PLASTIC MSOP
LT8672EMS
LT8672IMS
LT8672HMS
1
2
3
4
5
EN/UVLO
GND
PG
GND
NC
10
9
8
7
6
GATE
SOURCE
DRAIN
AUX
AUXSW
TOP VIEW
MS PACKAGE
10-LEAD PLASTIC MSOP
The LTC®2944 measures battery current, charge, voltage and internal temperature via an I2C interface. A precision
coulomb counter integrates current to determine charge. Features include programmable limit thresholds and alerts.
The LTC2944 provides useful measurements for any battery chemistry and capacity.
Measure Charge, Voltage, Current and Temperature with 1% Accuracy
, LT, LTC, LTM, Linear Technology, the Linear logo, and
µModule are registered trademarks of Analog Devices, Inc. All
other trademarks are the property of their respective owners.
Features
• Measures Accumulated Battery Charge
• 3.6V to 60V Operating Range for
Multicell Applications
• 14-Bit ADC Measures Voltage,
Current and Temperature
• 1% Charge, Voltage, Current Accuracy
• I2C/SMBus Interface
• Configurable Alert Output/Charge
Complete Input
• Quiescent Current <150µA
• 8-Pin 3mm x 3mm DFN Package
www.linear.com/product/LTC2944
1-800-4-LINEAR
Battery Monitors
Part Number
LTC2941
LTC2941-1
LTC2942
LTC2942-1
LTC2943
LTC2943-1
LTC2944
LTC4150
Package
Measures:
Q V I T
2.7V to 5.5V
2.7V to 5.5V
2.7V to 5.5V
2.7V to 5.5V
3.6V to 20V
3.6V to 20V
3.6V to 60V
2.7V to 8.5V
2mm x 3mm DFN-6
2mm x 3mm DFN-6
2mm x 3mm DFN-6
2mm x 3mm DFN-6
3mm x 3mm DFN-8
3mm x 3mm DFN-8
3mm x 3mm DFN-8
MSOP-10
1A
1A
1A
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Operating
Range
Internal Sense
Resistor
High Voltage Battery Monitor
LTC2944
3.6V to
60V
CHARGE
CURRENT
VOLTAGE
TEMP
1 9 5 4 Ah
Find your local sales office: www.linear.com/contact
The LTC®2944 measures battery current, charge, voltage and internal temperature via an I2C interface. A precision
coulomb counter integrates current to determine charge. Features include programmable limit thresholds and alerts.
The LTC2944 provides useful measurements for any battery chemistry and capacity.
Measure Charge, Voltage, Current and Temperature with 1% Accuracy
, LT, LTC, LTM, Linear Technology, the Linear logo, and
µModule are registered trademarks of Analog Devices, Inc. All
other trademarks are the property of their respective owners.
Features
• Measures Accumulated Battery Charge
• 3.6V to 60V Operating Range for
Multicell Applications
• 14-Bit ADC Measures Voltage,
Current and Temperature
• 1% Charge, Voltage, Current Accuracy
• I2C/SMBus Interface
• Configurable Alert Output/Charge
Complete Input
• Quiescent Current <150µA
• 8-Pin 3mm x 3mm DFN Package
www.linear.com/product/LTC2944
1-800-4-LINEAR
Battery Monitors
Part Number
LTC2941
LTC2941-1
LTC2942
LTC2942-1
LTC2943
LTC2943-1
LTC2944
LTC4150
Package
Measures:
Q V I T
2.7V to 5.5V
2.7V to 5.5V
2.7V to 5.5V
2.7V to 5.5V
3.6V to 20V
3.6V to 20V
3.6V to 60V
2.7V to 8.5V
2mm x 3mm DFN-6
2mm x 3mm DFN-6
2mm x 3mm DFN-6
2mm x 3mm DFN-6
3mm x 3mm DFN-8
3mm x 3mm DFN-8
3mm x 3mm DFN-8
MSOP-10
1A
1A
1A
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Operating
Range
Internal Sense
Resistor
High Voltage Battery Monitor
LTC2944
3.6V to
60V
CHARGE
CURRENT
VOLTAGE
TEMP
1 9 5 4 Ah
Find your local sales office: www.linear.com/contact
4
FEATURES DESCRIPTION
n
Rail-to-Rail Input Range: 0V to 100V
n
Wide Input Supply Range: 2.7V to 100V
n
Measures Current, Voltage and Power
n
Shunt Regulator for Supplies >100V
n
8-/12-Bit ADCs with Less Than ±0.3% Total Unadjusted Error
n
Four General Purpose Inputs/Outputs Congurable as ADC
Inputs
n
Continuous Scan and Snapshot Modes
n
Stores Minimum and Maximum Measurements
n
Alerts When Alarm Thresholds Exceeded
n
Shutdown Mode with IQ < 50μA
n
Split SDA Pin Eases Opto-Isolation
n
Available in 16-Lead 4mm × 3mm DFN and MSOP Packages
n
Telecom Infrastructure
n
Industrial Equipment
n
Automotive
n
Computer Systems and Servers
The LTC2992 is a rail-to-rail system monitor that measures current,
voltage and power of two supplies. It features an operating range
of 2.7V to 100V and includes a shunt regulator for supplies above
100V. The voltage measurement range of 0V to 100V is independent
of the input supply. Two ADCs simultaneously measure each
supply’s current. A third ADC monitors the input voltages and
four auxiliary external voltages. Each supply’s current and power
is added for total system consumption. Minimum and maximum
values are stored and an overrange alert with programmable
thresholds minimizes the need for software polling. Data is reported
via a standard I2C interface. Shutdown mode reduces current
consumption to 25μA typically.
The LTC2992 I2C interface includes separate data input and output
pins for use with standard or opto-isolated I2C connections. The
LTC2992-1 has an inverted data output for use with inverting opto-
isolator configurations.
APPLICATIONS
LTC2992
Dual Wide Range
Power Monitor
MS PACKAGE
16-LEAD PLASTIC MSOP
LTC2992CMS
LTC2992IMS
TC2992HMS
MS PACKAGE
16-LEAD PLASTIC MSOP
LTC2992CMS-1
LTC2992IMS-1
TC2992HMS-1
DE PACKAGE
16-LEAD (4mm × 3mm) PLASTIC DFN
LTC2992CDE
LTC2992IDE
TC2992HDE
DE PACKAGE
16-LEAD (4mm × 3mm) PLASTIC DFN
LTC2992CDE-1
LTC2992IDE-1
TC2992HDE-1
Power Monitor
ADC Error (GPIO)
12-BIT MODE
TYPICAL
CODE
0
1024
2048
3072
4096
–0.50
–0.25
0
0.25
0.50
ADC ERROR (%)
2992 TA01b
MAX ERROR
16
15
14
13
12
11
10
9
17
1
2
3
4
5
6
7
8
SENSE2–
SENSE2+
GPIO2
GPIO4
GND
SDAO
SDAI
SCL
SENSE1–
SENSE1+
GPIO1
GPIO3
ADR1
ADR0
INTVCC
VDD
TOP VIEW
DE PACKAGE
16-LEAD (4mm × 3mm) PLASTIC DFN
16
15
14
13
12
11
10
9
17
1
2
3
4
5
6
7
8
SENSE2–
SENSE2+
GPIO2
GPIO4
GND
SDAO
SDAI
SCL
SENSE1–
SENSE1+
GPIO1
GPIO3
ADR1
ADR0
INTVCC
VDD
TOP VIEW
DE PACKAGE
16-LEAD (4mm × 3mm) PLASTIC DFN
1
2
3
4
5
6
7
8
SENSE1–
SENSE1+
GPIO1
GPIO3
ADR1
ADR0
INTVCC
VDD
16
15
14
13
12
11
10
9
SENSE2–
SENSE2+
GPIO2
GPIO4
GND
SDAO
SDAI
SCL
TOP VIEW
MS PACKAGE
16-LEAD PLASTIC MSOP
1
2
3
4
5
6
7
8
SENSE1–
SENSE1+
GPIO1
GPIO3
ADR1
ADR0
INTVCC
VDD
16
15
14
13
12
11
10
9
SENSE2–
SENSE2+
GPIO2
GPIO4
GND
SDAO
SDAI
SCL
TOP VIEW
MS PACKAGE
16-LEAD PLASTIC MSOP
Dual Wide Range Power Monitor
V
DD
LTC2992
SDAI
SDAO
SCL
GPIO4
GPIO1
GPIO2
VIN1
3V TO 100V
I
2C
INTERFACE
VIN2
0V TO 100V
0.01Ω
ALERT
2992 TA01a
SENSE2
+
SENSE2
–
SENSE1
+
SENSE1
–
0.01Ω
0.1μF
ADR0
ADR1
GND
INTV
CC
GPIO3
DATAREADY
MEASURED
VOLTAGE 2
MEASURED
VOLTAGE 1
VOUT1
VOUT2
5
FEATURES DESCRIPTION
n
Wide Input Voltage Range: 4V to 36V
n
Two Independent 1.6A/40V Synchronous Bucks
n
I2C Interface for Internal True Color PWM™ Dimming (8192:1),
Analog Dimming and Fault Reporting
n
1000:1 External True Color PWM Dimming and 10:1External
Analog Dimming
n
PMOS Switch Driver for PWM and Output Disconnect
n
±3% Constant Current Regulation
n
Adjustable Frequency: 200kHz to 2MHz
n
Frequency Synchronization with Clock Output
n
Programmable OPENLED Protection with Reporting
n
Short-Circuit Protection with Reporting
n
Programmable Undervoltage Lockout with Hysteresis
n
Internal Compensation
n
Nine Unique Device Addresses for I2C
n
Available in 5mm × 6mm 36-Lead QFN Package
n
General Purpose, Industrial, Medical and
AutomotiveLighting
n
Constant-Current, Constant-Voltage Source
The LT3964 is a dual synchronous step-down DC/DC converter
with I2C interface designed to operate as a constant-current
and constant-voltage source and is ideal for driving LEDs. The
fixed frequency and peak current mode topology result in stable
operation over a wide range of supply and output voltages. The
ground referred voltage FB pin serves as the input for several LED
protection features, and also allows the converter to operate as a
constant-voltage source. The maximum output current is set by an
external resistor, and the output current amplifier has a rail-to-rail
common mode range. LT3964 uses an I2C interface to communicate
with a microcontroller to read LED faults, write PWM and analog
dimming registers and set fault masking. The I2CPWM input
provides LED dimming ratios up to 8192:1. The I2C programmable
CTRL register sets the gain of the external CTRL pin, and maximum
current sense threshold, providing additional analog dimming
capability.
APPLICATIONS
LT3964
Dual 36V Synchronous 1.6A
Buck LED Driver with I2C
UHE PACKAGE
36-LEAD (5mm × 6mm) PLASTIC QFN
LT3964EUHE
LT3964IUHE
LT3964HUHE
Protected by U.S. Patents, including 7199560, 7321203, 7746300.
50W Dual Buck 1A LED Driver
Efficiency, VIN = 34V
LED Driver
I
LED
(mA)
100
200
300
400
500
600
700
800
900
1000
70
75
80
85
90
95
100
EFFICIENCY (%)
IN
3964 TA01b
BOTH CHANNELS ARE ON
11 12 13 14
TOP VIEW
37
PGND
UHE PACKAGE
36-LEAD (5mm × 6mm) PLASTIC QFN
15 16 17 18
36 35 34 33 32 31 30 29
21
22
23
24
25
26
27
28
8
7
6
5
4
3
2
1RT
CTRL1
CTRL2
EN/UVLO
INTVCC
ALERT
PWM1
PWM2
SDA
SCL
ISP1
ISN1
PWMTG1
SGND
FB1
FB2
SGND
PWMTG2
ISN2
ISP2
SYNC/CLKOUT
TSET
VIN1
VIN1
NC
SW1
SW1
BST1
ADDR2
ADDR1
VIN2
VIN2
NC
SW2
SW2
BST2
20
19
9
10
10µH
0.22µF
1M
100mΩ
2.2µF
43.2k
2.2µF
100k
3.92k
499k
165k
100k
2.2µF
27.4k
2.2µF
BST1
LT3964
SW1
V
IN1
ISP1
ISN1
PWMTG1
CTRL1
BST2
SW2
ISP2
ISN2
PWMTG2
GND
EN/UVLO
CTRL2
PWM1
PWM2
PWM1
PWM2
INTVCC
ALERT
V
IN2
GND
T
SET
RT
SCL
SDA
2-WIRE
I2C INTERFACE
ADDR1
ADDR2
SYNC/CLKOUT
2MHz
INTVCC
INTV
CC
INTVCC
FB1
FB2
10µH
0.22µF
1M
100mΩ
2.2µF
43.2k
1A,
8 LEDs
UP TO
26V
1A,
8 LEDs
UP TO
26V
10µF
×2
31V TO 36V
(ENABLED AT 33V,
SHUTDOWN
AT 31V)
3964 TA01a
6
FEATURES DESCRIPTION
n
4.7V to 15V Input Voltage Range
n
0.6V to 1.8V Output Voltage Range
n
25A DC Output Current
n
±1.2% Total DC Output Voltage Error (–40°C to 125°C)
n
High Reliability N + 1 Phase Redundancy Supported
n
Internal or External Control Loop Compensation
n
Differential Remote Sense Amplifier for Precision Regulation
n
Current Mode Control/Fast Transient Response
n
Multiphase Current Sharing Up to 150A
n
Built-In Temperature Monitoring
n
Selectable Pulse-Skipping, Burst Mode
®
Operation
n
Soft-Start/Voltage Tracking
n
Frequency Synchronization
n
Output Overvoltage Protection
n
Output Overcurrent Foldback Protection
n
9mm × 15mm × 3.51mm BGA Package
n
Telecom, Networking and Industrial Equipment
n
Point-of-Load Regulation
The LTM4645 is a 25A output switching mode step-down DC/DC
µModule (power module) regulator. Included in the package are
the switching controller, power FETs, inductor and all supporting
components. Operating over an input voltage range of 4.7V to 15V,
the LTM4645 supports an output voltage range of 0.6V to 1.8V, set
by a single external resistor. Only a few input and output capacitors
are needed.
Its high efficiency design delivers about 86% efficiency from
12V input to 1.0V output with 25A continuous load current. High
switching frequency and a current mode architecture enable a
very fast transient response to line and load changes without
sacrificing stability. The device supports frequency synchronization,
programmable multiphase operation, N+1 phase redundancy, and
output voltage tracking for supply rail sequencing.
Fault protection features include overvoltage and overcurrent
protection. The power module is offered in a space saving 9mm
× 15mm × 3.51mm BGA package. The LTM4645 is available with
SnPb (BGA) or RoHS compliant terminal finish.
APPLICATIONS
LTM4645
25A DC/DC Step-Down
µModule Regulator
µModule Regulators
BGA PACKAGE
77-LEAD (9mm × 15mm × 3.51mm)
LTM4645EY
LTM4645IY
Efficiency vs Output Current at 1V Output
12VIN, 1VOUT, 25A DC/DC µModule Regulator
BGA PACKAGE
77-LEAD (9mm × 15mm × 3.51mm)
1
VIN
DRVCC
VOUT
GND
GND
GND
L
K
J
H
G
F
E
D
C
B
A
2 3 4
GND
PWM CLKOUTTEST1
MODE/PLLIN
PHASMD
INTVCC
FREQ
SGND
TEST3
PGOOD
COMPb
GND GND
SVIN
HIZB
GND
RUN
5 6 7
TOP VIEW
VFB
VOSNS+
COMPa
TEST2
VOSNS–
TEMP–
TEMP+
TRACK/SS
SW
LOAD CURRENT (A)
0
EFFICIENCY (%)
80
4645 TA01b
70
10 20
515 25
90
100
75
60
65
85
95
5V INPUT
12V INPUT
HIZB
VIN
SVIN
FREQ
COMPa
COMPb
TRACK/SS
PINS NOT USED IN THIS CIRCUIT:
CLKOUT, MODE/PLLIN, PGOOD,
PHASMD, PWM, RUN, SW, TEMP+, TEMP–
VOUT
VOSNS+
VFB
VOSNS–
22µF
25V
×2
2.2Ω
4.7µF
6.3V
1µF
0.1µF
VIN
6V TO 15V
43.2k
DRVCC INTVCC
LTM4645
SGND GND
90.9k
4645 TA01a
100µF
6.3V
×4
47pF
VOUT
1V
25A
7
FEATURES DESCRIPTION
µModule Regulators
n
Complete Low EMI Switch Mode Power Supply
n
EN55022 Class B Compliant
n
Wide Input Voltage Range: 3.6V to 58V
n
Up to 4A Output Current
n
24W Output from 12VIN to –24VOUT, PLOSS = 5W,
TA = 60°C, tRISE = 60°C, 200LFM
n
Output Voltage Range: –26.5V ≤ VOUT– ≤ –0.5V
n
Safe Operating Area: VIN + |VOUT–| ≤ 58V
n
±1.67% Total DC Output Voltage Error Over Line, Load and
Temperature (–40°C to 125°C)
n
Parallel and Current Share with Multiple LTM4651s
n
Constant-Frequency Current Mode Control
n
Frequency Synchronization Range: 250kHz to 3MHz
n
Power Good Indicator and Programmable Soft-Start
n
Overcurrent/Overvoltage/Overtemperature Protection
n
15mm × 9mm × 5.01mm BGA Package
n
Avionics, Industrial Control and Test Equipment
n
Video, Imaging and Instrumentation
n
48V Telecom and Network Power Supplies
n
RF Systems
The LTM4651 is an ultralow noise, 58V, 24W DC/DC μModule
inverting topology regulator. It regulates a negative output voltage
(VOUT–) from a positive input supply voltage (VIN), and is designed to
meet the radiated emissions requirements of EN55022. Conducted
emission requirements can be met by adding standard filter
components. Included in the package are the switching controller,
power MOSFETs, inductor, filters and support components.
The LTM4651 can regulate VOUT– to a value between –0.5V and
–26.5V, provided that its input and output voltages adhere to the
safe operating area criteria of the LTM4651: VIN+|VOUT–| ≤ 58V.
A switching frequency range of 250kHz to 3MHz is supported
(400kHz default) and the module can synchronize to an external
clock.
Despite being an inverting topology regulator, no level shift circuitry is
needed to interface to the LTM4651’s RUN, PGOOD or CLKIN pins;
those pins are referenced to GND.
The LTM4651 is offered in a 15mm × 9mm × 5.01mm BGA package
with SnPb or RoHS compliant terminal finish.
APPLICATIONS
LTM4651
EN55022B Compliant 58V, 24W
Inverting-Output DC/DC µModule Regulator
–24V, 2.25A* Ultralow Noise DC/DC µModule Register
Output Current Capability*
BGA PACKAGE
77-PIN (15mm × 9mm × 5.01mm)
LTM4651EY
LTM4651IY
1
A
B
C
D
E
F
G
H
J
K
L
234
TOP VIEW
BGA PACKAGE
77-PIN (15mm × 9mm × 5.01mm)
567
VIN
V
D
PGND
TEMP–
NC
NC
VOUT–
NC
SW
GND
SVIN
VINREG
SVOUT–
fSET
RUN
PGOOD PGDFB
CLKIN
VOUT–
VOUT–
SVOUT–
GNDSNS
EXTVCC
INTVCC
COMPb COMPa
ISETb ISETa
TEMP+
TEMP–
TEMP+
NC
Protected by U.S. Patents, including 5481178, 5705919, 5847554, 6580258.
PINS NOT USED IN
THIS CIRCUIT:
CLKIN, PGOOD,
PGDFB, SW, EXTVCC
TEMP+, TEMP–, NC
ISETaGND ISETb
VIN
SVIN
VD
RUN
INTVCC
VINREG
COMPa
COMPb
fSET
PGND
GNDSNS
SVOUT–
VOUT–
LTM4651 –24VOUT,
UP TO 2.25A
10µF
×2
LOAD
90.9k
481k
4.7μF
4.7μF
VIN
3.6V
TO 34V
4651 TA01a
INPUT VOLTAGE (V)
0
10
20
30
40
50
60
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
OUTPUT CURRENT (A)
4651 TA01b
*Current limit frequency-foldback
activates at load currents higher
than indicated curves. Continuous
output current capability subject to
details of application implementa-
tion.
VOUT– = –0.5V
VOUT– = –3.3V
VOUT– = –5V
VOUT– = –8V
VOUT– = –12V
VOUT– = –15V
VOUT– = –20V
VOUT– = –24V
, LT, LTC, LTM, Linear Technology, the Linear logo, and
µModule are registered trademarks of Analog Devices, Inc. All
other trademarks are the property of their respective owners.
Product Family Key Features & Part Numbers
Ultrathin Buck Regulators 1.8mm Height: LTM®4622, LTM4623
Buck-Boost Regulators LTM4607, LTM8055, LTM8056
Multiple Output Buck Regulators Dual: LTM4616, 4620, 4628, 4630 Triple: LTM4615
Quad: LTM4644 Quint: LTM8001, LTM8008
High Power Buck Regulators Up to 144A: Four in Parallel LTM4630
High Voltage Buck Regulators Up to 60V: LTM8027, LTM8050
Digital Interface Buck Regulators Dual Output: LTM4675, LTM4676, LTM4676A
Isolated Converters Up to 1500VDC: LTM8048, LTM8057, LTM8058
Ultralow Noise EN55022 Class B: LTM4606, LTM8033
LED Drivers Up to 36V LED String: LTM8040, LTM8042, LTM8042A
Battery Chargers Li-Ion, Li-Polymer, SLA, LiFePO4: LTM8061, LTM8062, LTM8062A
µModule Product Family Examples For More Information
www.linear.com/uModulepower
1-800-4-LINEAR
Our quickest, simplest and most integrated DC/DC power solutions are complete systems-in-a-package with integrated inductor,
MOSFET, DC/DC regulator IC and supporting components. With over 100 power solutions available, each µModule product
is qualified with Linear Technology’s stringent electrical, package and thermal reliability tests. Simplify and speed your power
system development with µModule power products. Our µModule products are available in both BGA and LGA packages.
Simple & Done
Over 100 µModule
®
Power Solutions
Complete Power System-in-a-Package
Find your local sales office: www.linear.com/contact
9
FEATURES DESCRIPTION
µModule Regulators
n
Low Noise Silent Switcher Architecture
n
Wide Input Voltage Range: 3.2V to 40V
n
Wide Output Voltage Range: 0.8V to 15V
n
2A Continuous Output Current at 12VIN, 5VOUT, TA=85°C
n
2.5A Peak Current
n
Selectable Switching Frequency: 200kHz to 2.2MHz
n
External Synchronization
n
Congurable as an Inverter
n
6.25mm × 4mm × 2.22mm BGA Package
n
Automotive Battery Regulation
n
Power for Portable Products
n
Distributed Supply Regulation
n
Industrial Supplies
n
Wall Transformer Regulation
The LTM8063 is a 40VIN, 2A continuous, 2.5A peak, step-down
µModule (power module) regulator. Included in the package are
the switching controller, power switches, inductor and all support
components. Operating over an input voltage range of 3.2V to 40V,
the LTM8063 supports an output voltage range of 0.8V to 15V
and a switching frequency range of 200kHz to 2.2MHz, each set
by a single resistor. Only the input and output filter capacitors are
needed to finish the design.
The low profile package enables utilization of unused space on
the bottom of PC boards for high density point of load regulation.
The LTM8063 is packaged in a thermally enhanced, compact
overmolded ball grid array (BGA) package suitable for automated
assembly by standard surface mount equipment. The LTM8063 is
RoHS compliant.
APPLICATIONS
LTM8063
40VIN 2A Silent Switcher
µModule Regulator
5VOUT from 6.5VIN to 40VIN Step-Down Converter
Efficiency vs Load Current
BGA PACKAGE
28-LEAD (6.25mm × 4mm × 2.22mm)
LTM8063EY
LTM8063IY
1µF
22µF
45.3k
27.4k
1.4MHz
LTM8063
VOUT
VOUT
5V
2A
2.5A PEAK
VIN
VIN
6.5V TO 40V
FB
GND
RUN
SYNC
RT
8063 TA01a
PINS NOT USED IN THIS CIRCUIT: TR/SS, PG
12V
IN
24V
IN
36V
IN
LOAD CURRENT (A)
0
0.5
1
1.5
2
2.5
55
65
75
85
95
EFFICIENCY (%)
8063 TA01b
GND
BANK 1
GND
BANK 3 VOUT
BANK 2
VIN
F
G
E
A
B
C
D
21 43
BGA PACKAGE
28-LEAD (6.25mm × 4mm × 2.22mm) BGA PACKAGE
FB
PG SYNC
FB TR/SS
RT
TOP VIEW
GND
RUN
, LT, LTC, LTM, Linear Technology, the Linear logo, and
µModule are registered trademarks of Analog Devices, Inc. All
other trademarks are the property of their respective owners.
Product Family Key Features & Part Numbers
Ultrathin Buck Regulators 1.8mm Height: LTM®4622, LTM4623
Buck-Boost Regulators LTM4607, LTM8055, LTM8056
Multiple Output Buck Regulators Dual: LTM4616, 4620, 4628, 4630 Triple: LTM4615
Quad: LTM4644 Quint: LTM8001, LTM8008
High Power Buck Regulators Up to 144A: Four in Parallel LTM4630
High Voltage Buck Regulators Up to 60V: LTM8027, LTM8050
Digital Interface Buck Regulators Dual Output: LTM4675, LTM4676, LTM4676A
Isolated Converters Up to 1500VDC: LTM8048, LTM8057, LTM8058
Ultralow Noise EN55022 Class B: LTM4606, LTM8033
LED Drivers Up to 36V LED String: LTM8040, LTM8042, LTM8042A
Battery Chargers Li-Ion, Li-Polymer, SLA, LiFePO4: LTM8061, LTM8062, LTM8062A
µModule Product Family Examples For More Information
www.linear.com/uModulepower
1-800-4-LINEAR
Our quickest, simplest and most integrated DC/DC power solutions are complete systems-in-a-package with integrated inductor,
MOSFET, DC/DC regulator IC and supporting components. With over 100 power solutions available, each µModule product
is qualified with Linear Technology’s stringent electrical, package and thermal reliability tests. Simplify and speed your power
system development with µModule power products. Our µModule products are available in both BGA and LGA packages.
Simple & Done
Over 100 µModule
®
Power Solutions
Complete Power System-in-a-Package
Find your local sales office: www.linear.com/contact
10
FEATURES DESCRIPTION
µModule Regulators
n
Complete Step-Down Switch Mode Power Supply
n
Low Noise Silent Switcher Architecture
n
Wide Input Voltage Range: 3.4V to 40V
n
Wide Output Voltage Range: 0.97V to 18V
n
2.5A Continuous Output Current, 3.5A Peak
n
Selectable Switching Frequency: 200kHz to 3MHz
n
External Synchronization
n
Programmable Soft-Start
n
Tiny, Low Prole 6.25mm × 6.25mm × 2.32mm RoHS Compliant
BGA Package
n
Automotive Battery Regulation
n
Power for Portable Products
n
Distributed Supply Regulation
n
Industrial Supplies
n
Wall Transformer Regulation
The LTM8065 is a 40VIN, 3.5A peak, 2.5A continuous step-down
µModule (power module) regulator. Included in the package are
the switching controller, power switches, inductor and all support
components. Operating over an input voltage range of 3.4V to
40V, the LTM8065 supports an output voltage range of 0.97V to
18V and a switching frequency range of 200kHz to 3MHz, each set
by a single resistor. Only the input and output filter capacitors are
needed to finish the design.
The low profile package enables utilization of unused space on
the bottom of PC boards for high density point of load regulation.
The LTM8065 is packaged in a thermally enhanced, compact
overmolded ball grid array (BGA) package suitable for automated
assembly by standard surface mount equipment. The LTM8065 is
RoHS compliant.
APPLICATIONS
LTM8065
40VIN, 2.5A Silent Switcher
µModule Regulator
BGA PACKAGE
36-LEAD (6.25mm × 6.25mm × 2.32mm)
LTM8065EY
LTM8065IY 2.2µF
22µF
60.4k
41.2k
1MHz
LTM8065
VOUT
VOUT
5V
2.5A
3.5A PEAK
VIN
VIN
7V TO 40V
FB
GND
RUN
SYNC
RT
8065 TA01a
PINS NOT USED IN THIS CIRCUIT: TR/SS, PG
AUX
BIAS
LOAD CURRENT (A)
VIN = 12V
0
1
2
3
80
85
90
95
EFFICIENCY (%)
8065 TA01b
GND
BANK 1 GND
BANK 3 VOUT
BANK 2
VIN
F
E
A
B
C
D
21 43 5 6
BGA PACKAGE
36-LEAD (6.25mm × 6.25mm × 2.32mm) BGA PACKAGE
BIAS
FB
PG
SYNCAUX TR/SS
RT
TOP VIEW
GND GND
RUN
Efficiency vs Load Current
5VOUT from 7VIN to 40VIN Step-Down Converter
11
FEATURES DESCRIPTION
Switching Regulators—Monolithic
n
Wide Input Voltage Range: 2.8V to 60V
n
Ultralow Quiescent Current and Low Ripple
BurstMode Operation: IQ = 9µA
n
2A, 60V Power Switch
n
Positive or Negative Output Voltage Programming
with a Single Feedback Pin
n
Programmable Frequency (300kHz to 2MHz)
n
Synchronizable to an External Clock
n
Spread Spectrum Frequency Modulation for Low EMI
n
BIAS Pin for Higher Efciency
n
Programmable Undervoltage Lockout (UVLO)
n
Thermally Enhanced 10-Lead 3mm × 3mm DFN and 16-Lead
MSOP Packages
n
Industrial and Automotive
n
Telecom
n
Medical Diagnostic Equipment
n
Portable Electronics
The LT8362 is a current mode DC/DC converter with a 60V, 2A
switch operating from a 2.8V to 60V input. With a unique single
feedback pin architecture it is capable of boost, SEPIC or inverting
configurations. Burst Mode operation consumes as low as 9µA
quiescent current to maintain high efficiency at very low output
currents, while keeping typical output ripple below 15mV.
An external compensation pin allows optimization of loop bandwidth
over a wide range of input and output voltages and programmable
switching frequencies between 300kHz and 2MHz. A SYNC/MODE
pin allows synchronization to an external clock. It can also be used
to select between burst or pulse-skipping modes of operation with
or without Spread Spectrum Frequency Modulation for low EMI.
For increased efficiency, a BIAS pin can accept a second input to
supply the INTVCC regulator. Additional features include frequency
foldback and programmable soft-start to control inductor current
during start-up.
The LT8362 is available in a thermally enhanced 10-lead 3mm ×
3mm DFN package or a thermally enhanced 16-lead MSOP package
with four pins removed.
APPLICATIONS
LT8362
Low IQ Boost/SEPIC/ Inverting Converter
with 2A, 60V Switch
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
LT8362EDD
LT8362IDD
LT8362HDD
MSE PACKAGE
VARIATION: MSE16(12)
16-LEAD PLASTIC MSOP
LT8362EMSE
LT8362IMSE
LT8362HMSE
TOP VIEW
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
10
9
6
7
8
4
5
3
2
1SW
SYNC/MODE
SS
RT
FBX
EN/UVLO
VIN
INTVCC
BIAS
VC
11
PGND,
GND
8362 TA01a
34.8k
57.6k
150pF
20k
1µF
VIN
SW
EN/UVLO
LT8362
VIN
8V TO 38V
VOUT
48V
200mA AT VIN = 8V
320mA AT VIN = 12V
700mA AT VIN = 24V
6.8μH
1M
SYNC/MODE
FBX
BIAS
SS
GND
VC
4.7µF
4.7µF
RT
INTVCC
10nF
4.7pF
EFFICIENCY
POWER LOSS
V
IN
= 12V
V
IN
= 24V
LOAD CURRENT (A)
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0
10
20
30
40
50
60
70
80
90
100
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
EFFICIENCY (%)
POWER LOSS (W)
8362 TA01b
1
3
5
6
7
8
EN/UVLO
VIN
INTVCC
NC
BIAS
VC
16
14
12
11
10
9
SW1
SW2
SYNC/MODE
SS
RT
FBX
TOP VIEW
17
PGND,
GND
MSE PACKAGE
VARIATION: MSE16 (12)
16-LEAD PLASTIC MSOP
2MHz, 48V Output Boost Converter
Efficiency and Power Loss
12
FEATURES DESCRIPTION
Find your local sales office: www.linear.com/contact
LTC7150S
VIN
3.1V to 20V
VOUT ≥0.6V @ 20A
Info & Free Samples
, LT, LTC, LTM, Linear Technology, the Linear logo, and
µModule are registered trademarks of Analog Devices, Inc. All
other trademarks are the property of their respective owners.
www.linear.com/product/LTC7150S
1-800-4-LINEAR
Selected Monolithic Single & Dual Buck Regulators
Need a high performance, high power point-of-load power supply for your digital IC (FPGA, uP, uC, DSP, GPU, PLD, ASIC)?
The LTC7150S is a 20A, high efficiency monolithic synchronous buck regulator that incorporates Silent Switcher 2 technology,
delivering excellent EMI performance while easing board layout. Its phase-lockable controlled on-time current mode architecture
enables large step-down ratios at high switching frequencies to deliver high power density solutions. PolyPhase operation allows
multiple LTC7150S regulators to run in parallel out-of-phase, reducing the amount of required input and output capacitance.
Its operating supply voltage range is 3.1V to 20V, with an output voltage range of 0.6V to VIN. With an operating frequency
programmable from 400kHz to 3MHz, it can use physically smaller inductor and capacitor sizes, and can be externally synchro-
nized over the same range for noise sensitive applications.
12VIN to 1.2V
OUT, 92% Efficient Monolithic Buck
20VIN & 20AOUT
Silent Switcher
®
2
LTC7150S
LTC7151S*
LT8642S*
LT8652S*
LTC3636
LTC7124
3.1V to 20V
3.1V to 20V
3V to 18V
3V to 18V
3.1V to 20V
3.1V to 17V
20A
15A
10A
8.5A/8.5A
6A/6A
3.5A/3.5A
3MHz
3MHz
3MHz
3MHz
4MHz
4MHz
Yes
Yes
No
Yes
No
No
5 x 6 x 1.3mm BGA
4 x 5 x 0.75mm LQFN
4 x 4 x 0.94mm LQFN
4 x 7 x 0.94mm LQFN
4 x 5 x 0.75mm QFN
3 x 5 x 0.75mm QFN
Part Number Freq (Max) Differential
Remote Sense
SS 2 ^^
SS 2 ^^
SS 2 ^^
SS 2 ^^
No
No
Silent
Switcher PackageVIN RangeIOUT
0.6V to VIN
0.5V to VIN
0.6V to VIN
0.6V to VIN
0.6V to 12V
0.6V to VIN
VOUT Range
* Future product, please contact for more information. ^^ SS 2 = noise-cancelling hot loops and integrated capacitors
12
10
8
6
4
2
0
100
95
90
85
80
75
70
0 4 8 12 16 20
POWER LOSS (W)
EFFICIENCY (%)
IOUT (A)
Efficiency and Power Loss
n
Flexible Power Supply System Capable of Four Regulated
Outputs with VBATT << VOUT
n
Two High Voltage Synchronous Buck Regulators
n
3V to 42V Input Voltage Range
n
Output Currents Up to 2.5A and 1.5A
n
One Low Voltage Synchronous Buck Regulator
n
2.6V to 5.5V Input Voltage Range
n
Output Currents Up to 1.8A
n
One Boost Controller Allows Buck Converters to Regulate
with VBATT << VOUT
n
Selectable Burst Mode Operation Allows Low 28µA IQ with
High Voltage Channels Active
n
Programmable Power-On Reset
n
Individual Channel Power Good Indicators
n
Step-Down Switching Frequency: 250kHz to 2.2MHz
n
Available in 40-Lead QFN (6mm × 6mm) Package
n
Automotive Stop-Start and ColdCrank Ride Through
n
Last-Gasp CPU Power Hold-Up
n
Industrial Controls and Power Supplies
The LT8603 is a highly flexible, quad output regulator combining
two high input voltage capable monolithic step-down switching
regulators, one low input voltage capable monolithic step-
down regulator, and a boost controller to satisfy a wide range of
applications while occupying minimal board space.
With the boost controller configured to supply the chip VIN
supply, the LT8603 produces three precisely regulated outputs
even when the boost input voltage falls significantly below the
regulated output voltages, such as during an automotive cold crank
scenario. Alternatively, with the boost controller driven from one
of the step-down regulator outputs or configured as a SEPIC, the
LT8603 provides four precisely regulated outputs over a wide input
voltagerange.
The LT8603 provides robust regulation by including a cycle-by-cycle
current limit for all step-down regulators, thermal shutdown, and a
boost controller that can tolerate reverse battery connections and
negative transient input voltages down to –42V.
APPLICATIONS
LT8603
42V, Low IQ, Quad Output Triple Monolithic
Buck Converter and Boost Controller
Cold Crank Tolerant Automotive Triple Output Supply
LT8603 Response to a Cold Crank
Automotive Input Waveform
8603 TA01a
OUT4
8V FOR
2V < VBATT
< 8.5V
GND
PORENPOREN
V
BATT
2V TO 42V
(BOOST
START-UP
ABOVE 4.3V)
LT8603
FB4
GATE4
ISN4
PG1-4
BIAS
RST
PG1-4
OUT2
RESET
ISP4PVIN1
VIN
EN/UVLO PVIN2
BST2
OUT3
1.2V, 1.8A
SW3
FB3
OUT2
3.3V,
2.5A – IPVIN3
SW2
FB2
PVIN3
BST1
OUT1
5V, 1.5A
SW1
FB1
TRKSS1-2
CPOR
RT
SYNC
FSEL4B
FSEL4A
INTVCC
INTVCC4
RUN3
2
4
TIME (10ms/DIV)
VOLTAGE
2V/DIV
0V
8603 TA01b
VBATT
V
OUT4
V
OUT1
V
OUT2
V
OUT3
UJ PACKAGE
40-LEAD (6mm × 6mm) PLASTIC QFN
LT8603EUJ
LT8603IUJ
3940 38 37 36 35 34 33 32 31
11 20
12 13 14 15
TOP VIEW
41
GND
UJ PACKAGE
40-LEAD (6mm × 6mm) PLASTIC QFN
16 17 18 19
22
23
24
25
26
27
28
29
9
8
7
6
5
4
3
2
PG1
GND
SW1
BST1
BST2
SW2
SW2
GND
BIAS
PG2
RUN3
RT
INTVCC
FB3
FB1
FB2
FB4
VIN
EN/UVLO
TRKSS1
PG3
POREN
GND
PVIN1
SW3
GND
PVIN3
SYNC
RST
CPOR
PG4
FSEL4A
GND
PVIN2
GATE4
INTV
CC4
FSEL4B
ISN4
ISP4
TRKSS2
21
30
10
1
Switching Regulators—Monolithic
Find your local sales office: www.linear.com/contact
LTC7150S
VIN
3.1V to 20V
VOUT ≥0.6V @ 20A
Info & Free Samples
, LT, LTC, LTM, Linear Technology, the Linear logo, and
µModule are registered trademarks of Analog Devices, Inc. All
other trademarks are the property of their respective owners.
www.linear.com/product/LTC7150S
1-800-4-LINEAR
Selected Monolithic Single & Dual Buck Regulators
Need a high performance, high power point-of-load power supply for your digital IC (FPGA, uP, uC, DSP, GPU, PLD, ASIC)?
The LTC7150S is a 20A, high efficiency monolithic synchronous buck regulator that incorporates Silent Switcher 2 technology,
delivering excellent EMI performance while easing board layout. Its phase-lockable controlled on-time current mode architecture
enables large step-down ratios at high switching frequencies to deliver high power density solutions. PolyPhase operation allows
multiple LTC7150S regulators to run in parallel out-of-phase, reducing the amount of required input and output capacitance.
Its operating supply voltage range is 3.1V to 20V, with an output voltage range of 0.6V to VIN. With an operating frequency
programmable from 400kHz to 3MHz, it can use physically smaller inductor and capacitor sizes, and can be externally synchro-
nized over the same range for noise sensitive applications.
12VIN to 1.2V
OUT, 92% Efficient Monolithic Buck
20VIN & 20AOUT
Silent Switcher
®
2
LTC7150S
LTC7151S*
LT8642S*
LT8652S*
LTC3636
LTC7124
3.1V to 20V
3.1V to 20V
3V to 18V
3V to 18V
3.1V to 20V
3.1V to 17V
20A
15A
10A
8.5A/8.5A
6A/6A
3.5A/3.5A
3MHz
3MHz
3MHz
3MHz
4MHz
4MHz
Yes
Yes
No
Yes
No
No
5 x 6 x 1.3mm BGA
4 x 5 x 0.75mm LQFN
4 x 4 x 0.94mm LQFN
4 x 7 x 0.94mm LQFN
4 x 5 x 0.75mm QFN
3 x 5 x 0.75mm QFN
Part Number Freq (Max) Differential
Remote Sense
SS 2 ^^
SS 2 ^^
SS 2 ^^
SS 2 ^^
No
No
Silent
Switcher PackageVIN RangeIOUT
0.6V to VIN
0.5V to VIN
0.6V to VIN
0.6V to VIN
0.6V to 12V
0.6V to VIN
VOUT Range
* Future product, please contact for more information. ^^ SS 2 = noise-cancelling hot loops and integrated capacitors
12
10
8
6
4
2
0
100
95
90
85
80
75
70
0 4 8 12 16 20
POWER LOSS (W)
EFFICIENCY (%)
IOUT (A)
Efficiency and Power Loss
14
FEATURES DESCRIPTION
Switching Regulators—Monolithic
n
Silent Switcher
2 Architecture:
n
Ultralow EMI on Any PCB
n
Eliminates PCB Layout Sensitivity
n
Internal Bypass Capacitors Reduce Radiated EMI
n
Optional Spread Spectrum Modulation
n
4A DC from Each Channel Simultaneously
n
Up to 6A on Either Channel
n
Ultralow Quiescent Current Burst Mode Operation:
n
6.2μA IQ Regulating 12VIN to 5VOUT1 and 3.3VOUT2
n
Output Ripple <10mVP-P
n
Optional External VC Pin: Fast Transient Response and Current
Sharing (Extra 50µA IQ/Channel)
n
Forced Continuous Mode
n
High Efciency at High Frequency
n
94.6% Efciency at 2A, 5VOUT from 12VIN at 2MHz
n
93.3% Efciency at 4A, 5VOUT from 12VIN at 2MHz
n
Fast Minimum Switch-On Time: 40ns
n
Wide Input Voltage Range: 3.0V to 42V
n
Adjustable and Synchronizable: 300kHz to 3MHz
n
Small 4mm × 6mm 32-Lead LQFN Package
n
General Purpose Step-Down
n
Automotive and Industrial Supplies
The LT8650S is a dual step-down regulator that delivers up to
4A of continuous current from both channels and supports loads
up to 6A from each channel. The LT8650S features the second
generation Silent Switcher architecture to minimize EMI emissions
while delivering high efficiency at high switching frequencies.
This includes integration of bypass capacitors to optimize high
frequency current loops and make it easy to achieve advertised EMI
performance by eliminating layout sensitivity.
The fast, clean, low overshoot switching edges enable high
efficiency operation even at high switching frequencies, leading to
a small overall solution size. Peak current mode control with a 40ns
minimum on-time allows high step down ratios at high switching
frequencies.
Burst Mode operation features a 6.2μA quiescent current resulting
in high efficiency at low output currents, forced continuous mode
allows fixed switching frequency operation over the entire output
load range, and spread spectrum operation can further reduce EMI
emissions. External VC pins allow optimal loop compensation for
fast transient response. The VC pins can also be used for current
sharing and the CLKOUT pin enables synchronizing two LT8650S
chips to generate a 4-phase, 16A supply.
APPLICATIONS
LT8650S
Dual Channel 4A, 42V, Synchronous Step-Down
Silent Switcher 2 with 6.2µA Quiescent Current
Efficiency
5V/4A, 3.3V/4A 2MHz Step-Down Converter
LQFN PACKAGE
32-LEAD (6mm × 4mm × 0.94mm)
LT8650SEV
LT8650SIV
LQFN PACKAGE
32-LEAD (6mm × 4mm × 0.94mm)
TOP VIEW
272829303132
VC1
FB1
SS1
SS2
FB2
VC2
SYNC
PG2
PG1
TEMP
EN2
EN1
161514131211
26
25
24
23
22
20
19
18
17
BIAS
VCC
BST1
SW1
SW1
SW2
SW2
BST2
CLKOUT
1
2
4
5
7
8
10
RT
GND
VIN1
VIN1
VIN2
VIN2
GND
33
GND
34
GND
35
GND
36
GND
37
GND
38
GND
8650s TA01a
VIN2 VIN2
3.7V TO 42V
VOUT2
3.3V
4A
EN/UV2
LT8650S
SW2
FB2
VC2 VCC
SS2
4.7µF
1.0µH
BIAS
VIN1
EN/UV1
SW1
FB1
VC1VCC
SS1
RT
10nF
4.7pF 47µF
×2
1M
316k
VIN1
5.4V TO 42V
VOUT1
5V
4A
4.7µF
10nF
47µF
×2 4.7pF 1M
191k
1.0µH
1µF
15k
fSW = 2MHz
GND SYNCVCC
LOAD CURRENT (A)
0
1
2
3
4
5
6
40
45
50
55
60
65
70
75
80
85
90
95
100
EFFICIENCY (%)
CH1 5V
CH2 3.3V
V
IN1
= V
IN2
= 12V
f
SW
= 2MHz
8650s TA01b
Protected by U.S. Patents, including 8823345.
15
FEATURES DESCRIPTION
Switching Regulators—Controllers
n
4-Switch Current Mode Single Inductor Architecture Allows
VIN Above, Below or Equal to VOUT
n
Wide VIN Range: 4.5V to 150V
n
Wide Output Voltage Range: 1.2V ≤ VOUT ≤ 150V
n
Synchronous Rectification: Up to 99% Efficiency
n
±1% 1.2V Voltage Reference
n
Input or Output Average Current Limit
n
Onboard LDO or External NMOS LDO for DRVCC
n
36V EXTVCC LDO Powers Drivers
n
Programmable 6V to 10V DRVCC Optimizes Efficiency
n
No Top FET Refresh Noise in Boost or Buck Mode
n
VOUT Disconnected from VIN During Shutdown
n
Phase-Lockable Fixed Frequency (50kHz to 600kHz)
n
No Reverse Current During Start-Up
n
Power Good Output Voltage Monitor
n
150V Rated RUN Pin with Accurate Turn-On Threshold
n
Programmable Input Overvoltage Lockout
n
Thermally Enhanced FE38 TSSOP Package Modied for High
Voltage Operation
n
Industrial, Automotive, Medical, Military, Avionics
The LTC3779 is a high performance buck-boost switching regulator
controller that operates from input voltages above, below or equal to
the output voltage. The constant frequency current mode architecture
allows a phase-lockable frequency of up to 600kHz, while an input/
output constant current loop provides support for battery charging.
With a wide 4.5V to 150V input and output range and seamless
transfers between operating regions, the LTC3779 is ideal for
automotive, telecom and battery-powered systems.
The LTC3779 features a precision 1.2V reference and power good
output indicator. The MODE pin can select between pulse-skipping
mode or forced continuous mode of operation. Pulse-skipping
mode offers high efficiency at light load while forced continuous
mode operates at a constant frequency for noise sensitive
applications. The PLLIN pin allows the IC to be synchronized to an
external clock. The SS pin ramps the output voltage during start-up.
Current foldback limits MOSFET heat dissipation during short-circuit
conditions.
APPLICATIONS
LTC3779
150V VIN and VOUT Synchronous
4-Switch Buck-Boost Controller
FE PACKAGE
VARIATION: FE38(31)
38-LEAD PLASTIC TSSOP
LTC3779EFE
LTC3779IFE
LTC3779HFE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
TOP VIEW
FE PACKAGE
VARIATION: FE38(31)
38-LEAD PLASTIC TSSOP
38
37
36
34
32
30
28
26
24
22
21
20
BG1
VINOV
DRVSET
SGND
EXTVCC
NDRV
DRVCC
V5
SS
VFB
SENSEP
SENSEN
ITH
SGND
MODE
PLLIN
FREQ
PGOOD
BG2
SW1
TG1
BOOST1
VIN
VINSNS
VOUTSNS
IAVGSNSN
IAVGSNSP
RUN
BOOST2
TG2
SW2
39
PGND
Efficiency and Power Loss vs Input Voltage
V
OUT
= 48V
I
OUT
= 10A
EFFICIENCY
POWER LOSS
VIN VOLTAGE (V)
0
12
24
36
48
60
72
84
96
108
120
90
92
94
96
98
100
0
6
12
18
24
30
EFFICIENCY (%)
POWER LOSS (W)
3779 TA01b
4.7µF
4mΩ
4mΩ
30µF
475k
15µH
0.22µF
0.22µF
12.1k
3779 TA01a
10k
100pF
10nF
2.2µF
0.1µF
56.2k
FREQ
IAVGSNSN
IAVGSNSP
ITH
RUN
SENSEN
SENSEP
SS
VFB
VINOV
VINSNS
VOUTSNS
BOOST1
BOOST2
DRVCC
NDRV
PGND
SGND
SW1
SW2
V5
VIN
TG1
BG1
BG2
TG2
LTC3779
100Ω
100Ω
220pF
1k
1k
1.21k
133k
10µF
10k
5Ω
0.1µF
5µF
56µF
VIN
20V TO
120V
20µF
VOUT
48V
10A
100Ω
100Ω
16
FEATURES DESCRIPTION
Switching Regulators—Controllers
n
Phase Extender for High Phase Count Voltage Rails
n
Operates with Power Blocks, DrMOS or External Gate
Drivers and MOSFETs
n
Accurate Phase-to-Phase Current Sharing
n
Sub-Milliohm DCR Current Sensing
n
Phase-Lockable Fixed Frequency 250kHz to 1MHz
n
Immediate Response to Master IC's Fault
n
Up to 12-Phase Operation
n
Wide VIN Range: 4.5 to 38V
n
VOUT Range: Up to 3.5V (LOWDCR Pin High)
Up to 5.5V (LOWDCR Pin Low)
n
Proprietary Current Mode Control Loop
n
Programmable CCM/DCM Operation
n
Programmable Phase Shift Control
n
24-Lead (4mm × 4mm) QFN Package
n
High Current Distributed Power Systems
n
Telecom, Datacom and Storage Systems
n
Intelligent Energy Efcient Power Regulation
The LTC3874-1 is a dual PolyPhase current mode synchronous
step-down slave controller. It enables high current, multiphase
applications when paired with a companion master controller by
extending the phase count. Compatible master controllers include
the LTC3884-1, LTC3774, LTC3875, LTC3877 and LTC3866. The
LTC3874-1 employs a unique architecture that enhances the signal-
to-noise ratio of the current sense signal, allowing the use of sub-
milliohm DC resistance power inductors to maximize efficiency while
reducing switching jitter. Its peak current mode architecture allows
for accurate phase-to-phase current sharing even for dynamic
loads.
Effectively working with a master controller, the LTC3874-1
supports all the programmable features as well as fault protection.
APPLICATIONS
LTC3874-1
PolyPhase Step-Down Synchronous Slave
Controller with Sub-Milliohm DCR Sensing
High Efficiency, 4-Phase 1.8V/120A Step-Down Supply
4-Phase Efficiency and Power Loss
vs Output Current, Sub-Milliohm DCR
vs Traditional DCR
UF PACKAGE
24-LEAD (4mm × 4mm) PLASTIC QFN
LTC3874EUF-1
LTC3874IUF-1
V
IN
= 12V
V
OUT
= 1.8V
fSW = 425kHz
CCM
EFFICIENCY
POWER LOSS
0.29mΩ
1.5mΩ
0.29mΩ
1.5mΩ
LOAD CURRENT (A)
0
10
20
30
40
50
60
70
80
90
100
110
120
70
75
80
85
90
95
100
2
5
8
11
14
17
20
EFFICIENCY (%)
POWER LOSS (W)
38741 TA01b
24 23 22 21 20 19
789
TOP VIEW
UF PACKAGE
24-LEAD (4mm × 4mm) PLASTIC QFN
25
GND
10 11 12
6
5
4
3
2
1
13
14
15
16
17
18
ISENSE0+
ISENSE0–
RUN0
RUN1
ISENSE1–
ISENSE1+
VCC0
VIN
INTVCC
EXTVCC
VCC1
PWM1
MODE0
ITH0
LOWDCR
FAULT0
FAULT1
PWM0
MODE1
ITH1
FREQ
ILIM
SYNC
PHASMD
PWM0 PWM1
LTC3874-1
INTVCC
0.22µF
VCC0
VCC1
PHASMD
LDWDCR
ILIM
FREQ
GND
RUN0
SYNC
RUN1
FAULT0
FAULT1
RUN0
649Ω
(0.29mΩ DCR)
0.215µH
(0.29mΩ DCR)
0.215µH
FAULT0
FAULT1
RUN1
SYNC
REFER TO LTC3884-1 DATA SHEET
FOR MASTER SETUP
PIN NOT USED IN THIS CIRCUIT: EXTVCC
ITH0
ITH1
VSENSE0+
1.8V
100µF
×3
100µF
×3
470µF
×2
470µF
×2
LTC3884-1
ISENSE0+
ISENSE0–ISENSE1+
ISENSE1–
ITH0
ITH1
VSENSE1+
VIN
7V TO 14V
VOUT
1.8V
120A
VIN
PGOOD0
PGOOD1
MODE0
MODE1
38741 TA01a
100k
DrMOS DrMOS
+0.22µF
4.7µF
+
649Ω
Protected by U.S. Patents, including 5481178, 5705919, 5929620, 6144194, 6177787, 6580258, 5408150.
17
FEATURES DESCRIPTION
Switching Regulators—Controllers
94% Efficiency 24W (16V, 1.5A) 2MHz Buck-Boost LED Driver
Efficiency vs VIN
n
4-Switch Single Inductor Architecture Allows VIN Above,
Below or Equal to VOUT
n
Up to 95% Efficiency at 2MHz
n
Proprietary Peak-Buck Peak-Boost Current Mode
n
Wide VIN Range: 4V to 60V
n
Wide VOUT Range: 0V to 60V (51V LED)
n
±3% LED Current Accuracy
n
2000:1 External and 128:1 Internal PWM Dimming
n
High Side PMOS PWM Switch Driver
n
No Top MOSFET Refresh Noise in Buck or Boost
n
Adjustable and Synchronizable: 600kHz to 2MHz
n
Flicker-Free Spread Spectrum for Low EMI
n
Open and Short LED Protection with Fault Reporting
n
Available in 28-Lead TSSOP with Exposed Pad and 28-Lead
QFN (4mm × 5mm)
n
Automotive Head Lamps/Running Lamps
n
High Frequency LED Lighting
The LT8391A is a synchronous 4-switch buck-boost LED controller
that regulates LED current from input voltage above, below or
equal to the output voltage. The proprietary peak-buck peak-boost
current mode control scheme allows adjustable and synchronizable
600kHz to 2MHz fixed frequency operation, or internal 25% triangle
spread spectrum operation for low EMI. With 4V to 60V input, 0V to
60V output, and seamless low noise transitions between operation
regions, the LT8391A is ideal for LED driver and battery charger
applications in automotive, industrial and battery-powered systems.
The LT8391A provides both internal (up to 128:1) and external (up to
2000:1) LED current PWM dimming with a high side PMOS switch.
Two CTRL pins provide flexible 20:1 analog dimming with ±3% LED
current accuracy at 100mV full scale. Fault protection is provided to
detect an open or short LED condition, during which the LT8391A
retries, latches off or keeps running.
APPLICATIONS
LT8391A
60V 2MHz Synchronous 4-Switch
Buck-Boost LED Driver Controller
UFD PACKAGE
28-LEAD (4mm × 5mm) PLASTIC QFN
LT8391AEUFD
LT8391AIUFD
LT8391AHUFD
FE PACKAGE
28-LEAD PLASTIC TSSOP
LT8391AEFE
LT8391AIFE
LT8391AHFE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
FE PACKAGE
28-LEAD PLASTIC TSSOP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
BG1
BST1
SW1
TG1
LSP
LSN
VIN
INTVCC
EN/UVLO
RP
PWM
VREF
CTRL1
ISP
BG2
BST2
SW2
TG2
VOUT
PWMTG
SYNC/SPRD
RT
VC
FB
SS
FAULT
CTRL2
ISN
29
GND
165k
22nF
4.7µF
0.1µF
22µF
383k
4.7µF
100k
0.47µF
59.0k
3.3nF
4.7k
1M
48.7k
10µF
100k
90.9k
0.1µF
1µF
1µF
2.2µH
6mΩ
56mΩ
300k
113k
EN/UVLO
V
REF
CTRL1
FAULT
BG2
BST2
TG2
INTV
CC
FB
V
OUT
ISP
ISN
SYNC/SPRD
V
IN
6V TO 32V CONTINUOUS
4V TO 56V TRANSIENT
2MHz
63V
100V
×2
25V
×2
FAULT
LSP
LSN
SW1
SW2
BST1
TG1
BG1
V
IN
LT8391A
SS
V
C
RT
GND
SSFM OFF
SSFM ON
INTV
CC
INTV
CC
INTV
CC
PWMTG
16V
1.5A
LEDs
PWM
RP
CTRL2
ANALOG DIM
PWM DIM
PWM SETTING
488Hz
EXT
INT
8391a TA01a
9 10
TOP VIEW
UFD PACKAGE
28-LEAD (4mm × 5mm) PLASTIC QFN
11 12 13
28 27 26 25 24
14
23
6
5
4
3
2
1
TG1
LSP
LSN
VIN
INTVCC
EN/UVLO
RP
PWM
TG2
VOUT
PWMTG
SYNC/SPRD
RT
VC
FB
SS
SW1
BST1
BG1
BG2
BST2
SW2
VREF
CTRL1
ISP
ISN
CTRL2
FAULT
7
17
18
19
20
21
22
16
815
29
GND
INPUT VOLTAGE (V)
0
5
10
15
20
25
30
35
40
45
60
65
70
75
80
85
90
95
100
EFFICIENCY (%)
8391a TA01b
18
FEATURES DESCRIPTION
Switching Regulators—Controllers
n
Easily Configurable as a Synchronous Buck, Boost, SEPIC,
ZETA or Nonsynchronous Buck-Boost Converter
n
Wide Input Range: 4.5V to 42V (VIN Can Operate
to 0V, when EXTVCC > 4.5V)
n
Automatic Low Noise Burst Mode Operation
n
Low IQ in Burst Mode Operation (15μA Operating)
n
Input Voltage Regulation for High Impedance Source
n
100% Duty Cycle in Dropout (Buck Mode)
n
2A Gate Drivers (BG and TG)
n
Adjustable Soft-Start with One Capacitor
n
Frequency Programmable from 100kHz to 750kHz
n
Can Be Synchronized to External Clock
n
Available in 20-Lead TSSOP and 20-Lead 3mm × 4mm QFN
Packages
n
General Purpose DC/DC
Conversion
n
Automotive Systems
n
Industrial Supplies
n
Solar Panel Power
Converter
The LT8711 is a multitopology current mode PWM controller that
can easily be configured as a synchronous buck, boost, SEPIC,
ZETA or as a nonsynchronous buck-boost converter. Its dual gate
drive voltage inputs optimize gate driver efficiency.
The 15µA no-load quiescent current with the output voltage in
regulation extends operating run time in battery powered systems.
Low ripple Burst Mode operation enables high efficiency at very
light loads while maintaining low output voltage ripple. The LT8711's
fixed switching frequency can be set from 100kHz to 750kHz or can
be synchronized to an external clock.
The additional features include 100% duty cycle capability when
in buck mode, a topology selection pin and adjustable soft-start.
LT8711 is available in the 20-lead TSSOP and 20-lead 3mm×4mm
QFN packages.
APPLICATIONS
LT8711
Micropower Synchronous Multitopology
Controller with 42V Input Capability
FE PACKAGE
20-LEAD PLASTIC TSSOP
LT8711EFE
LT8711IFE
FE PACKAGE
20-LEAD PLASTIC TSSOP
1
2
3
4
5
6
7
8
9
10
TOP VIEW
20
19
18
17
16
15
14
13
12
11
EN/FBIN
FB
VC
SS
OPMODE
ISP
ISN
INTVEE
BIAS
TG
RT
SYNC
NC
CSP
CSN
EXTVCC
VIN
INTVCC
NC
BG
21
GND
UDC PACKAGE
20-LEAD (3mm × 4mm) PLASTIC QFN
LT8711EUDC
LT8711IUDC
20 19 18 17
7 8
TOP VIEW
21
GND
UDC PACKAGE
20-LEAD (3mm × 4mm) PLASTIC QFN
9 10
6
5
4
3
2
1
11
12
13
14
15
16
VC
SS
OPMODE
ISP
ISN
INTVEE
CSP
CSN
EXTVCC
VIN
INTVCC
NC
FB
EN/FBIN
RT
SYNC
BIAS
TG
NC
BG
BIAS
INTVEE
TG
BG
CSP
CSN
2.2µF
2.2µF
100pF
60.4k
110k
330nF
100pF
2.2nF
ISN
ISP
GND
EN/FBIN
EXTVCC
OPMODE
INTVCC
RT
SYNC
SS
VC
1M
4mΩ
69.8k
100µF ×2
16V, X7R
VOUT
12V,
3.5A (VIN >16V)
2.5A (9V < VIN < 16V)
1.5A (VIN < 9V)
10µF ×6
50V, X7R
VIN
5V TO
40V
LT8711
FB
VIN
VOUT
M1
D1
L1
4.7µH D2
M2
4mΩ
8711 TA01a
400kHz 5V to 40V Input/12V Output Nonsynchronous Buck-Boost
LOAD CURRENT (A)
0.001
0.01
0.1
1
4
0
10
20
30
40
50
60
70
80
90
100
EFFICIENCY (%)
8711 TA01b
VIN = 5V
VIN = 12V
VIN = 24V
VIN = 36V
Efficiency vs Load Current
Our No-Opto isolated flyback devices need no opto-coupler or LT1431 for regulation. The devices sense the reflected isolated
output voltage from the primary-side waveform, resulting in better than ±1% load and line regulation. This simplifies the design,
enables a smaller solution size and only requires one component crossing the isolation barrier. Several off-the-shelf transformers
are shown in the data sheets, making it easy to complete the design.
No-Opto Isolated Flyback Converters
•
•
No Opto or
Reference
VOUT
SOT-23 SO-SE
GND
SW
RFB
VIN
VIN: 2.7V to 100V
LT830X
Switch
Inside
No-Opto Monolithic Devices (Internal Switch)
No-Opto Controller Devices (External Switch)
Part Number VIN Range (V) Max POUT (W) Power Switch Rating Package
LT8300 6-100 2 0.23A/150V SOT-23
LT8303 5.5-100 5 0.5A/150V SOT-23
LT8301 2.7- 42 6 1.2A/65V SOT-23
LT8302 2.8-42 18 3.6A/65V SO-8E
LT8304/LT8304-1 3-100 24 2A/150V SO-8E
LT8315 18-560 15 0.3A/630V TSSOP-20 (16)
Part Number VIN Range Max POUT (W) Description Package
LT3748 5VDC-100VDC 80-100 No-Opto Flyback Controller MSOP-16 (12)
LT8309 4.5VDC-40VDC 80-100 Flyback Synchronous Rectifier Driver SOT-23
LT3798 20-400VDC/90-264VAC 80-100 No-Opto Flyback Controller with PFC MSOP-16E
All registered trademarks and trademarks are the property of their respective owners.
Our No-Opto isolated flyback devices need no opto-coupler or LT1431 for regulation. The devices sense the reflected isolated
output voltage from the primary-side waveform, resulting in better than ±1% load and line regulation. This simplifies the design,
enables a smaller solution size and only requires one component crossing the isolation barrier. Several off-the-shelf transformers
are shown in the data sheets, making it easy to complete the design.
No-Opto Isolated Flyback Converters
•
•
No Opto or
Reference
VOUT
SOT-23 SO-SE
GND
SW
RFB
VIN
VIN: 2.7V to 100V
LT830X
Switch
Inside
No-Opto Monolithic Devices (Internal Switch)
No-Opto Controller Devices (External Switch)
Part Number VIN Range (V) Max POUT (W) Power Switch Rating Package
LT8300 6-100 2 0.23A/150V SOT-23
LT8303 5.5-100 5 0.5A/150V SOT-23
LT8301 2.7- 42 6 1.2A/65V SOT-23
LT8302 2.8-42 18 3.6A/65V SO-8E
LT8304/LT8304-1 3-100 24 2A/150V SO-8E
LT8315 18-560 15 0.3A/630V TSSOP-20 (16)
Part Number VIN Range Max POUT (W) Description Package
LT3748 5VDC-100VDC 80-100 No-Opto Flyback Controller MSOP-16 (12)
LT8309 4.5VDC-40VDC 80-100 Flyback Synchronous Rectifier Driver SOT-23
LT3798 20-400VDC/90-264VAC 80-100 No-Opto Flyback Controller with PFC MSOP-16E
All registered trademarks and trademarks are the property of their respective owners.
LT8303 Telecom/Datacom Isolated Schematic
Output Load and
Line Regulation
Features
n
Input Voltage Ranging from 2.7V to 400V
n
No Opto-Coupler Required
n
Primary-Side VOUT Sensing
n
Only One Part Crossing the Isolation Barrier
n
Internal Loop Compensation for Monolithic Required Devices
n
Compact Packages
n
Off-the-Shelf Transformers from Wurth, Sumida
and Pulse Engineering
Applications
n
Telecom/Datacom
n
Industrial Controls
n
Automotive
n
Factory Automation
n
Heavy Equipment
n
Medical
n
Robotics and Aviation
n
Housekeeping Supplies
1.25cm
3cm
T1
6:1
150µH 4.2µH
4.7µF
VIN
6V TO 80V
VOUT+
5V
VOUT–
LT8303
RFB
SWEN/UVLO
VIN
GND
316k
2.5mA TO 0.33A (VIN = 12V)
2.5mA TO 0.52A (VIN = 24V)
2.5mA TO 0.73A (VIN = 48V)
2.5mA TO 0.84A (VIN = 72V)
•
•
100µF
V
IN
= 12V
V
IN
= 24V
V
IN
= 48V
V
IN
= 72V
LOAD CURRENT (mA)
0
100
200
300
400
500
600
700
800
900
4.7
4.8
4.9
5.0
5.1
5.2
5.3
OUTPUT VOLTAGE (V)
V
IN
= 12V
V
IN
= 24V
V
IN
= 48V
V
IN
= 72V
LOAD CURRENT (mA)
0
100
200
300
400
500
600
700
800
900
40
50
60
70
80
90
100
EFFICIENCY (%)
Efficiency vs Load Current
LT8303 Demo Board Photo
SOT-23
1016
www.linear.com/830X n 1-800-454-6327
Description
400mA boost converter with MPP control and 250mV start-up
300mA buck-boost converter and power manager with MPPC
Ultralow voltage converter and primary battery life extender
Ultralow voltage boost converter and system manager
Auto-polarity version of LTC3108
Energy harvesting DC/DC converter with battery life extender
Piezoelectric energy harvesting power supply
Power tracking 2A solar battery charger
Nanoamp operating current shunt Li-Ion battery charger
Energy Source
Part Number
LTC®3105
LTC3106
LTC3107
LTC3108
LTC3109
LTC3330/31
LTC3588
LT®3652/HV
LTC4070/71
Practical Ambient Energy Harvesting for WSNs
Single Nanopower ICs Manage Multiple Input Sources
All registered trademarks and trademarks are the property of their respective owners.
LT8303 Telecom/Datacom Isolated Schematic
Output Load and
Line Regulation
Features
n
Input Voltage Ranging from 2.7V to 400V
n
No Opto-Coupler Required
n
Primary-Side VOUT Sensing
n
Only One Part Crossing the Isolation Barrier
n
Internal Loop Compensation for Monolithic Required Devices
n
Compact Packages
n
Off-the-Shelf Transformers from Wurth, Sumida
and Pulse Engineering
Applications
n
Telecom/Datacom
n
Industrial Controls
n
Automotive
n
Factory Automation
n
Heavy Equipment
n
Medical
n
Robotics and Aviation
n
Housekeeping Supplies
1.25cm
3cm
T1
6:1
150µH 4.2µH
4.7µF
VIN
6V TO 80V
VOUT+
5V
VOUT–
LT8303
RFB
SWEN/UVLO
VIN
GND
316k
2.5mA TO 0.33A (VIN = 12V)
2.5mA TO 0.52A (VIN = 24V)
2.5mA TO 0.73A (VIN = 48V)
2.5mA TO 0.84A (VIN = 72V)
•
•
100µF
V
IN
= 12V
V
IN
= 24V
V
IN
= 48V
V
IN
= 72V
LOAD CURRENT (mA)
0
100
200
300
400
500
600
700
800
900
4.7
4.8
4.9
5.0
5.1
5.2
5.3
OUTPUT VOLTAGE (V)
V
IN
= 12V
V
IN
= 24V
V
IN
= 48V
V
IN
= 72V
LOAD CURRENT (mA)
0
100
200
300
400
500
600
700
800
900
40
50
60
70
80
90
100
EFFICIENCY (%)
Efficiency vs Load Current
LT8303 Demo Board Photo
SOT-23
1016
www.linear.com/830X n 1-800-454-6327
Description
400mA boost converter with MPP control and 250mV start-up
300mA buck-boost converter and power manager with MPPC
Ultralow voltage converter and primary battery life extender
Ultralow voltage boost converter and system manager
Auto-polarity version of LTC3108
Energy harvesting DC/DC converter with battery life extender
Piezoelectric energy harvesting power supply
Power tracking 2A solar battery charger
Nanoamp operating current shunt Li-Ion battery charger
Energy Source
Part Number
LTC®3105
LTC3106
LTC3107
LTC3108
LTC3109
LTC3330/31
LTC3588
LT®3652/HV
LTC4070/71
Practical Ambient Energy Harvesting for WSNs
Single Nanopower ICs Manage Multiple Input Sources
All registered trademarks and trademarks are the property of their respective owners.
We offer a wide range of ultralow power products targeted for Energy Harvesting applications. Power management products that convert
energy from Vibration (Piezo), PhotoVoltaic (Solar) and Thermal (TEC, TEG, Thermopiles, Thermocouples) sources provide high efficiency
conversion to regulated voltages and charge batteries and/or super capacitor storage elements. These Energy Harvesting ICs automatically
manage ambient and battery energy to dramatically extend the run time of a primary battery. Boost converters that operate from as little as
20mV or battery chargers with Maximum Power Point capability expand the possibilities for a wide variety of industrial automation and control,
wireless sensor, transportation, automotive and building management applications.
Ultralow quiescent current linear regulators, op amps, comparators, voltage supervisors, analog-to-digital converters, digital-to-ana log
converters and micropower voltage references provide additional fundamental building blocks required for autonomous systems.
Energy Harvesting
Part
Number Description Output Power
Level
Number
of
Outputs Energy
Source Packages Topology IQ
VIN MIN
(V)
VIN MAX
(V)
LTC3330 Nanopower Buck-Boost DC/DC
with Energy Harvesting Battery
Life Extender
0.1mW to
50mW
2 Vibration, Solar
(AC or DC)
5mm × 5mm
QFN-32
Full Bridge
Rectifier,
Buck
750nA 3.0V(EH)
1.8V(VBATT)
19V(EH)
5V(VBATT)
LTC3331 Nanopower Buck-Boost DC/DC
with Energy Harvesting
Battery Charger
0.1mW to
50mW
1 Vibration, Solar
(AC or DC)
5mm × 5mm
QFN-32
Full Bridge
Rectifier,
Buck
950nA 3.0V 19V
LTC3107 Ultralow Voltage Energy
Harvester and Primary
Battery Life Extender
0.01mW to
5mW
2 Thermal 3mm × 3mm
DFN-10
Boost 80nA 20mV 500mV
LTC3106 300mA Ultralow IQ Step-Up
Converter and Power
Manager with MPPC
0.1mW to
160mW
2 Solar 3mm × 4mm
QFN-20,
TSSOP-20E
Buck-
Boost
1.5µA 330mV 5.5V
Energy Harvesting ICs
LTC4071 Li-Ion/Polymer Shunt Battery
Charger System with Low
Battery Disconnect
0.1mW to
250mW
1 − DFN-8,
MSOP-8
Shunt
Battery
Charger
550nA None
LTC4070 Li-Ion/Polymer Shunt Battery
Charger System
0.1mW to
250mW
1 − DFN-8,
MSOP-8E
Shunt
Battery
Charger
450nA None
LTC3588-1/
LTC3588-2/
LTC3588-3
Piezoelectric Energy
Harvesting Power Supply
0.1mW to
50mW
1 Piezoelectric MS-10,
DFN-10
Buck 450nA 14 20
LTC3388-1/
LTC3388-3
20V, High Efficiency Nano
Step-Down Regulator
0.1mW to
250mW
1 All DFN-10,
MS-10
Buck 400nA 2.7 20
LTC3526L 550mA 1MHz Synchronous
Step-Up DC/DC Converters
in 2mm × 2mm DFN
0.1mW to
650mW
1 Solar DFN-6 Boost 9µA 0.5 5
LTC3109 Auto-Polarity, Ultralow
Voltage Step-Up Converter
and Power Manager
0.1mW to
50mW
3 Thermoelectric QFN-20,
SSOP-20
Boost 200nA 0.02 0.5
LTC3108/
LTC3108-1
Ultralow Voltage
Step-Up Converter and
Power Manager
0.1mW to
50mW
3 Thermoelectric DFN-12,
SSOP-16
Boost 200nA 0.02 0.5
LTC3105 400mA Step-Up DC/DC
Converter with Maximum
Power Point Control and
250mV Start-Up
0.1mW to
1100mW
1 Solar DFN-10,
MS-12
Boost 24µA 0.2 5
LT3652HV Power Tracking
2A Battery Charger
1W to 30W 1 Solar DFN-12,
MS-12
Buck 19µA 4.95 34
LT3652 Power Tracking 2A Battery
Charger for Solar Power
1W to 30W 1 Solar DFN-12,
MS-12
Battery
Charger
19µA 4.95 32
Energy Harvesting ICs with Battery Life Extenders
0417 REV C
www.linear.com/energyharvesting n 1-800-454-6327
Design Note
165k
22nF
0.1µF
100V
×2
0.1µF
22µF
383k
4.7µF
100k
0.47µF
59.0k
2.2nF
10k
110k
10k
0.1µF
124k
75k
0.1µF
1µF
1µF
L1
1µH
M3
M4
M1
M2
1µF
10Ω
10Ω
22µF
22µF
D1
D2
5mΩ
R1
10mΩ
R2
EN/UVLO
V
REF
CTRL
PGOOD
BG2
BST2
TG2
INTV
CC
LOADEN
FB
V
OUT
ISP
ISN
SYNC/SPRD
TEST
2MHz
63V
16V
×2
ISMON
PGOOD
25V
V
OUT
12V
4A
LSP
LSN
SW1
SW2
BST1
TG1
BG1
V
IN
LT83 90A
LOADTG
ISMON
SS
V
C
RT
GND
SSFM OFF
SSFM ON
25V
×2
INTV
CC
INTV
CC
INTV
CC
dn567 F01
VIN
6V TO 28V
(CONTINUOUS)
4V TO 60V
(TRANSIENT)
4.7µF
100V
×2
L1: WURTH 74437336010 1µH
M1, M2: INFINEON BSZ065NO6LS5
M3, M4: INFINEON BSZ031NE2LS5
D1, D2: NEXPERIA BAT46WJ
R1: SUSUMU KRL3216D-M-R005-F-T5
60V 2MHz Buck-Boost Controllers Regulate High Power Voltage
and Current with High Efficiency and Low EMI
Keith Szolusha
Synchronous buck-boost controllers are versatile and
highly efficient. They can produce high power as both a
boost and a buck with a single inductor, keeping power
supply design simple. Normally, a buck-boost controller
in a high power application is operated at a standard or
low switching frequency, this maximizes efficiency and
avoids complications related to shoot-through and switch
blanking time, which can arise in synchronous rectification
at high frequencies. Nevertheless, a high frequency 2MHz
buck-boost controller with a smaller inductor ensures that
the EMI content resides above the AM frequency band.
The LT8390A and LT8391A buck-boost controllers are
unique in that they operate at 2MHz. The high switching
speed enables use of a small inductor for a compact
solution size, even in high power applications.
Unlike monolithic converters, which save space with power
switches inside the IC package, controllers can drive
external power switches withmuch higher peak currents,
such as 10A. Such high peak currents would burn up the
small IC packages of typical integrated converters, but
external 3mm × 3mm synchronous MOSFETs can handle
this power. The MOSFETs can be arranged in tight quarters
with hot-loop capacitors for very low EMI. The unique
peak switch current sense amplifier architecture places
the sense resistor next to the power inductor, outside the
critical input and output hot loops, also reducing EMI.
2MHz, 95% Efficiency, 12V, 4A Buck-Boost
The 2MHz, 12V, 4A buck-boost regulator in Figure1 boasts
efficiency to 95%. This relatively compact design uses
3mm × 3mm MOSFETs and a single high power inductor.
The temperature rise for this converter is low, even at 48W.
At 12V input, no component rises more than 45°C above
room temperature. At 7V input, the hottest component
rises less than 55°C with a standard 4-layer PCB and no
heat sink or airflow. This converter handles short input
transients down to 4V at 4A load, or runs continuously
at 4V input with 2A of load (~25W).
Figure 1. 2MHz 12V, 4A Buck-Boost Voltage Regulator with High Efficiency
10/17/567
All registered trademarks and trademarks are the property of their respective owners. Design Note 567
CONTINUOUS OPERATION WITH
HIGHEST COMPONENT TEMPERATURE
BELOW 90°C (TA = 25°C)
INPUT VOLTAGE (V )
0
5
10
15
20
25
30
35
40
50
60
70
80
90
100
EFFICIENCY (%)
dn567 F03
IOUT = 2A
IOUT = 4A
165k
22nF
4.7µF
0.1µF
22µF
383k
4.7µF
100k
0.47µF
113k
90.9k
59.0k
3.3nF
4.7k
1M
54.9k
10µF
100k
0.1µF
1µF
1µF
L1
2.2µH
M3
M4
M1
M2
D1
D2
6mΩ
R1
56mΩ
M5
D3
300k
488Hz
FB2
0.1µF
FB1
4.7µF
0.1µF
10Ω
D5
10Ω
D4
EN/UVLO
V
REF
CTRL1
FAULT
BG2
BST2
TG2
INTV
CC
FB
V
OUT
ISP
ISN
SYNC/SPRD
VIN
6V TO 40V
(CONTINUOUS)
4V TO 60V
(TRANSIENT)
2MHz
63V
100V
×2
+
0.1µF
×2
25V
×2
+
0.1µF
×2
FAULT
LSP
LSN
SW1
SW2
BST1
TG1
BG1
V
IN
LT83 91A
SS
V
C
RT
GND
SSFM OFF
SSFM ON
INTV
CC
INTV
CC
INTV
CC
PWMTG
PWM
RP
CTRL2
ANALOG DIM
PWM DIM
100V
×2
16V
1.5A
LEDs
INPUT EMI FILTER
OUTPUT EMI
FILTER
dn567 F02
5.1Ω
5.1Ω
INTERNAL PWM
L1: COILCRAFT XAL5030-222MEB
M1, M2: NEXPERIA BUK9M42-60E
M3, M4: INFINEON IPZ40N04S5L-7R4
M5: NEXPERIA PMV50EPEA
D1, D2: NEXPERIA BAT46WJ
D3: NEXPERIA PMEG3010EB
D4, D5: NEXPERIA PMEG2010AEB
FB1: 2
× PARALLEL TDK MPZ2012S221ATD25
FB2: 2
× PARALLEL TDK MPZ2012S102ATD25
R1: SUSUMU KRL3216D-C-R006-F
Figure 2. Low EMI 16V, 1.5A Automotive Buck-Boost LED Driver Passes CISPR 25 Class 5 EMI
The LT8390A’s high switching frequency (600kHz to 2MHz)
distinguishes it from the field of 4-switch controllers. It also
has a variety of notable features like its lower frequency
cousin, the LT8390. It has a PGOOD flag, short-circuit
protection, and a flexible current-limiting sense resistor for
output or inrush current restrictions. Its spread spectrum
frequency modulation (SSFM) for low EMI makes it ideal
for automotive applications.
2MHz Low EMI Automotive Buck-Boost LED Driver
The LT8391A is a 2MHz LED driver counterpart of the
LT8390A. The main difference is that LT8391A includes
LED driver PWM dimming features and open LED fault
protection. The output sense resistor controls current
through a string of LEDs whose voltage may lie within the
input voltage range, such as the 9V to 16V car battery.
It can run down to 4V cold crank and can withstand up
to 60V input transients. LT8391A provides up to 2000:1
PWM dimming ratio at 120Hz and it can use its internal
PWM dimming generator (no external clock required) for
up to 128:1 accurate dimming.
The 2MHz LT8391A LED driver shown in Figure 1 is
optimized for automotive headlights. It uses AEC-Q100
components and meets CISPR 25 Class 5 radiated EMI
standards. SSFM reduces EMI, and also runs flicker-free
simultaneously with PWM dimming.
This compact design features a small inductor and
especially small input and output EMI filters. It can
run down to 4V and up to 60V. The four synchronous
MOSFETs shown can be replaced with two dual MOSFETs
for reduced component count when needed. It reaches
93% efficiency. The FAULT flag reports short-circuit and
open LED conditions, which are handled with ease.
Conclusion
The LT8390A and LT8391A 2MHz 60V buck-boost
controllers can regulate high power voltage and current
in compact spaces. The low EMI architecture and SSFM
feature make these ideal for low EMI applications.
Figure 3. LT8390A Efficiency of Figure 1
© ANALOG DEVICES, INC. 2017
DN567 LT/AP 1017 71K • PRINTED IN THE USA
Data Sheet Download
For applications help, call (408) 432-1900
www.linear.com/LT8390A
Cool Running, 144W, 4 × 40A µModule POL Regulator
Introduction
The LTM
®
4636 is a 40A-capable µModule
®
regulator
featuring 3D packaging technology, or component-on-
package (CoP) to keep it cool—see Figure 1. The body
of the device is an overmolded 16mm × 16mm×1.91mm
BGA package with an inductor stacked on top to expose
it to cooling airflow. The total package height is 7.16 mm.
In addition to dissipating heat from the top through the
exposed inductor, the LTM4636 efficiently disperses heat
to the PCB via 144 BGA solder balls dedicated to GND, VIN
and VOUT—where high current flows.
A single LTM4636 is rated for 40A loads; two parallel
converters can support 80A; four support 160A. Upscaling
a power supply by paralleling LTM4636s is easy: simply
copy and paste the single-regulator footprint, as shown
in Figure 1.
The current mode architecture of the LTM4636 enables
precision current sharing among the 40A blocks. Precise
current sharing, in turn, produces a power supply that
spreads the heat evenly between devices. Figure 2 shows
that all devices in the 4-µModule 160A regulator operate
within 1°C of each other, ensuring that no individual device
is overloaded or overheated. This greatly simplifies heat
mitigation.
Figure 3 shows the complete 160A design. Note that no clock
device is required for the LTM4636s to operate out-of-phase
to each other—clocking and phase control is included.
Multiphase operation reduces input and output ripple
current, reducing the number of required input and output
capacitors. Here, the four LTM4636s run 90° out-of-phase.
Conclusion
Choosing a POL regulator for a densely populated system
requires scrutiny beyond voltage and amperage ratings of
the device. Evaluation of package thermal characteristics
is essential, as it determines the cost of cooling, the cost
of the PCB and final product size.
10/17/569
All registered trademarks and trademarks are the property of their respective owners.
Figure 1. 3D Packaging of the LTM4636 Puts One of the Hottest
Components, the Inductor, on Top, Where Significant Surface Area Is
Exposed to Airflow. It Is Easy to Lay Out Parallel LTM4636s to Scale
Power Capability—Simply Duplicate the Layout of One Channel and
Multiply. The Clean Layout Here Shows Four Channels at 40A Each.
Design Note 569
Design Note
Afshin Odabaee and Yan Liang
Figure 2. Precision Current Sharing Among Four LTM4636s Running
in Parallel, Resulting in Only 40°C Rise in Temperature for 160A
Application.
DN529 F01
VIN = 12V, VOUT = 0.9V, IOUT = 160A
Airflow = 400LFM
Efficiency = 88%
DN529 F02
+
COMPA
COMPB
TK/SS
RUNC
RUNP
HIZREG
PHMODE
FREQ
MODE/PLLIN
CLKOUT
TMON
PWM
SW
VOUT
TEMP+TEMP–SNSP1 SNSP2 SGND
VIN
34.8k
22µF
VOLTAGE OUT
TEMP MONITOR
22µF
16V
22µF
16V
22µF
16V
22µF
16V
150µF
35V
7V TO 14V
12V
12V
12V
INTVCC2
RUNC
RUNP
CLK2
CLK1
COMP
TK/SS
OPTIONAL TEMP MONITOR
FOR TELEMETRY READBACK ICs
INTVCC
INTV
CC2
5V PV
CC2
U2
LTM4636
PVCC
PGND
VFB
VOUTS1–
VFB POWER GND
PWM2 TP
470µF
6.3V
+
470µF
6.3V
100µF
6.3V
×4
GND_SNS
2.2Ω, 0805 2200pF
2200pF
VOUT
+
COMPA
COMPB
TK/SS
RUNC
RUNP
HIZREG
TMON
PWM
SW
VOUT
TEMP+TEMP–SNSP1 SNSP2 SGND
VIN
34.8k
4.99k
5V
PVCC1
22µF
VOLTAGE OUT
TEMP MONITOR
CSS
0.47µF
0.47µF INTVCC1
RUNC
RUNP
CLK1
COMP
TK/SS
OPTIONAL TEMP MONITOR
FOR TELEMETRY READBACK ICs
INTVCC
INTVCC1 5V PVCC1
U1
LTM4636
PVCC
PGND
VFB
VFB
PWM1 TP
470µF
6.3V
RFB
2.5k
+470µF
6.3V
100µF
6.3V
×4
VOUTS1–
VOUTS1+
2.2Ω, 0805
0.9V
AT
160A
+
COMPA
COMPB
TK/SS
RUNC
RUNP
HIZREG
PHMODE
FREQ
MODE/PLLIN
CLKOUT
TMON
PWM
SW
VOUT
TEMP+TEMP–SNSP1 SNSP2 SGND
VIN
34.8k
22µF
GND_SNS
VOLTAGE OUT
TEMP MONITOR
INTVCC3
RUNC
RUNP
CLK3
CLK2
TK/SS
COMP
OPTIONAL TEMP MONITOR
FOR TELEMETRY READBACK ICs
PINS NOT USED IN CIRCUIT U2:
PGOOD, TEST1, TEST2,
TEST3, TEST4, VOUTS1, GMON
PINS NOT USED IN CIRCUIT U1:
PGOOD, TEST1, TEST2,
TEST3, TEST4, GMON
PINS NOT USED IN CIRCUIT U3:
PGOOD, TEST1, TEST2,
TEST3, TEST4, VOUTS1, GMON
PINS NOT USED IN CIRCUIT U4:
PGOOD, TEST1, TEST2,
TEST3, TEST4, VOUTS1, GMON
INTVCC
INTVCC3 5V PVCC3
U3
LTM4636
PVCC
PGND
VFB VFB
PWM3 TP
470µF
6.3V
+470µF
6.3V
100µF
6.3V
×4
GND_SNS
2.2Ω, 0805 2200pF
+
COMPA
COMPB
TK/SS
RUNC
RUNP
HIZREG
PHMODE
FREQ
MODE/PLLIN
TMON
PWM
SW
VOUT
TEMP+TEMP–SNSP1 SNSP2 SGND
VIN
34.8k
22µF
VOLTAGE OUT
TEMP MONITOR
INTVCC4
RUNC
RUNP
CLK3
COMP
TK/SS
OPTIONAL TEMP MONITOR
FOR TELEMETRY READBACK ICs
INTVCC
INTVCC4 5V PVCC4
U4
LTM4636
PVCC
PGND
VFB
VOUTS1–
VFB
PWM4 TP
470µF
6.3V
+470µF
6.3V
100µF
6.3V
×4
GND_SNS
2.2Ω, 0805
2200pF
100pF
VOUTS1–
+
22µF
16V
22µF
16V
22µF
16V
22µF
16V
22µF
16V
22µF
16V
22µF
16V
22µF
16V
22µF
16V
22µF
16V
22µF
16V
22µF
16V
PHMODE
FREQ
MODE/PLLIN
CLKOUT
SGND
SGND
SGND
SGND
SGND
SGND
SGND
SGND
SGND
SGND
SGND
SGND
SGND
SGND
SGND
DN569 F03
© ANALOG DEVICES, INC. 2017
DN569 LT/AP 1017 305K • PRINTED IN THE USA
Data Sheet Download
www.linear.com/LTM4636
For applications help, call (408) 432-1900
Figure 3. 140W Regulator Features Four LTM4636s Running in Parallel with Precision Current Sharing and High
Efficiency 12V Input to 0.9V Output at 160A
More Info Features
, LT, LTC, LTM, Linear Technology, the Linear logo,and µModule
are registered trademarks of Analog Devices, Inc. All other trademarks
are the property of their respective owners.
www.linear.com/product/LTC7820
1-800-4-LINEAR
• VIN Range: 6V to 72V, 80V abs max
•Voltage Divider (2:1)/Doubler (1:2)/
Inverter (1:-1)
•High Power Density: Up to 4000W/in
3
•Capable of 500W+
•Soft Switching – Low EMI
•Overload, OV/UV Protection
•Fault Protection/Programmable Timer
•Operating Frequency: 100kHz to 1MHz
•4mm x 5mm QFN-28 Package
Efficiency vs Load Current
OUTPUT LOAD CURRENT (A)
EFFICIENCY (%)
100
99
98
97
96
95
94
93
92
0 2 4 6 8 10 12 14 16 18 20
48V to 24V
The LTC7820 brings a new level of performance and simplicity to fixed ratio non-isolated bus converters by eliminating the power
inductor, providing a 50% reduction in circuit size compared to alternative solutions. It drives external MOSFETs in either a voltage
divider (2:1), doubler (1:2) or inverter (1:-1) configuration with up to 99% efficiency and a power density of up to 4000W/in3.
Multiple LTC7820s can be cascaded for higher conversion ratios. Its open loop fixed duty cycle is ideal for non-isolated intermediate
bus applications commonly found in power distribution, datacom, telecom, computing and industrial systems.
500W
Inductorless Bus Converter
99% Efficient Step-Down, Step-Up or Invert
Find your local sales office: www.linear.com/contact
28mm
6mm
28mm
Top Bottom Side
No Airflow
No Heat Sink
© 2017 Analog Devices, Inc. • MC 1217 7.5K • Printed in U.S.A