Linear Regulators
InfoCard 10
Linear Technology Corporation • 1630 McCarthy Blvd. • Milpitas, CA 95035-7417 • (408) 432-1900 • www.linear-tech.com • Literature Only: 1-800-4-LINEAR
Rev H 1299
, LTC and LT are registered trademarks of Linear Technology Corporation.
LINEAR REGULATORS
Low Dropout
w/Remote Sense
LT1761 (0.1A)††
LT1762 (0.15A)†
LT1020 (0.125A)
LT1120 (0.125A)
LT1120A (0.125A)
LT1121 (0.150A)
LT1521 (0.3A)**
LT1579 (0.3A)†
LT1763 (0.5A)
LT1129 (0.700A)*, **
LT1117 (0.8A)*, **
LT1086 (1.5A)*
LT1085 (3A)*
LT1528 (3A)*
LT1529 (3A)*
LT1587 (3A)*
LT1764 (3A)*
LT1585 (4.6A)*
LT1084 (5A)
LT1585A (5A)
LT1580 (7A)
LT1584 (7A)
LT1083 (7.5A)
LT1581 (10A)
LT117A/317A (1.5A)
LT138A/338A (5A)
LT1083 (10A)
LM117/317 (1.5A)
LM150/350 (3A)
LM138/338 (5V)
LT1087 (5A)
LT123A/323A (3A)
LM123/323 (3A)
LT1003 (5A)
LT1005 (5V, 1A)
LT1035 (5V, 3A)
LT1036 (12V, 3A)
LT137A/337A (1.5A)
LT1033 (3A)
UltraFast is a trademark of Linear Technology Corporation.
LM137/337 (1.5A)
Adjustable Fixed 1.5V
* Available in surface mount DD package
** Available in surface mount SOT223 package
† Available in surface mount SSOP or MSOP package
††
Available in SOT-23
Bold denotes a new product
LT1761-3 (0.1A)††
LT1762-3.3 (0.15A)†
LT1121-3.3 (0.15A)**
LT1521-3.3 (0.3A)**,
†
LT1763-3.3 (0.5A)
LT1129-3.3 (0.7A)*, **
LT1117-3.3 (0.8A)**
LT1086-3.3 (1.5A)*
LT1764-3.3 (3A)*
LT1085-3.3 (3A)*
LT1529-3.3 (3A)
LT1587-3.3 (3A)*
LT1585-3.3 (4.6A)*
LT1084-3.3 (5A)
LT1585A-3.3 (5A)
LT1584-3.3 (7A)
LT1761-5 (0.1A)
††
LT1762-5 (0.15A)
†
LT1121-5 (0.15A)**
LT1521-5 (0.3A)**,
†
LT1763-5 (0.5A)
LT1129-5 (0.7A)*, **
LT1117-5 (0.8A)**
LT1118-5 (0.8A/–0.4A)
LT1086-5 (1.5A)
LT1085-5 (3A)
LT1529-5 (3A)*
LT1084-5 (5A)
LT1083-5 (7.5A)
LT1123 (PNP Driver)**
LT1086-12 (1.5A)
LT1085-12 (3A)
LT1084-12 (5A)
LT1083-12 (7.5A)
LT1521 (300mA, 12µA)
LT1121 (150mA, 30µA)
LT1020 (125mA, 40µA)
LT1120 (125mA, 40µA)
LT1579 (300mA, 50µA)
LT1129 (800mA, 50µA)
LT1118 (800mA, 600µA)
LT1761 (100mA, 20µA)
LT1762 (150mA, 25µA)
LT1763 (500mA, 30µA)
LT1086-3.6 (1.5A)*
LT1085-3.6 (3A)*
LT1587-3.6 (3A)
LT1585-3.6 (4A)*
LT1584-3.6 (7A)
LT1761-2.8 (0.1A)††
LT1117-2.85 (0.8A)
LT1118-2.85 (0.8A/–0.4A)
LT1086-2.85 (1.5A)
LT1587-1.5 (3A)
LT1585-1.5 (4.6A)
LT1585A-1.5 (5A)
Fixed 1.8V
LT1761-1.8 (0.1A)††
LT1764-1.8 (3A)*
Fixed 2.0V
LT1761-2 (0.1A)††
Fixed 3.6V
Fixed 5V
LT1579 (0.3A)
LT1579-3 (0.3A)
LT1579-3.3 (0.3A)
LT1579-5 (0.3A)
Dual Input
Fixed 12V
LT1761-2.5 (0.1A)††
LT1762-2.5 (0.15A)†
LT1118 (0.8A/–0.4A)
LT1763-2.5 (0.5A)
LT1764-2.5 (3A)*
LT1580-2.5(7A)
LT1581-2.5 (10A)
Fixed 2.5V
LT1587-3.45 (3A)*
LT1585-3.45 (4A)*
LT1584-3.45 (7A)
Fixed 3.45V
LT1761-3 (0.1A)††
LT1762-3 (0.15A)†
LT1763-3 (0.5A)
LT1521-3 (0.3A)**,
†
Fixed 3.0V
LT1585-3.38 (4A)*
LT1584-3.38 (7A)
Fixed 3.38V
Fixed 2.8V Fixed 3.3V
Adjustable Fixed 5V
LT1575
LT1575-1.5
LT1575-2.8
LT1575-3.3
LT1575-3.5
LT1575-5
LT1573
LT1573-2.5
LT1573-2.8
LT1573-3.3
Single Controllers
LT1577-Adj/Adj
LT1577-3.3/Adj
LT1577-3.3/2.8
Dual Controllers
Logic Controlled
LT1175 (500mA)
LT1185 (3A)
Adjustable
LT1175-5 (500mA)
Fixed –5V
4% V
REF
1% V
REF
4% V
REF
1% V
REF
Adjustable
Positive Low Dropout
Positive UltraFast
TM
Transient Response
Low Dropout, High Current
Positive Standard
Negative Low Dropout
Negative Standard
Positive Micropower
Key: Part Number (Output Current, Quiescent Current), New products in bold
Linear Regulators
InfoCard 10
2
PART DROPOUT I
Q
OUTPUT REF DATABOOK
I
OUT
NUMBER VOLTAGE V
IN
MAX (SUPPLY)* VOLTAGES (V)
††
SHUTDOWN REFERENCE NOTES
100mA LT1761 0.3V 20V 20µA Adj, 1.8, 2, 3, 3.3, 5 1.22 New SOT-23, MSOP-8, Very Low Noise, Protected from
Reverse Battery or Current
125mA LT1020 0.4V 36V 40µA Adjustable 2.50 90:4-39 SO, Comparator & Reference, Class B Outputs
LT1120 0.4V 36V 40µA Adjustable 2.50 94:4-107 S8, Comparator & Reference, Logic Shutdown
150mA LT1121 0.42V 30V 30µA Adj, 3.3, 5 3.750 94:4-114 SOT-223, S8, Self-Protection
LT1762 0.3V 20V 25µA Adj, 2.5, 3, 3.3, 5 1.25 New MSOP-8, Very Low Noise, Self-Protected
300mA LT1521 0.5V 20V 12µA Adj, 3, 3.3, 5 3.750 95:4-79 MSOP, SOT-223, S8, Stable with Small Output Cap
LT1579 0.4V 20V 50µA Adj, 3, 3.3, 5 1.500 99:4-118 S8, S16, SSOP; Dual Input Smooth Switching
500mA LT1086 0.95V 25V 5mA* Adjustable 1.250 94:4-72 Low Dropout
LT1763 0.3V 20V 30µA Adj, 2.5, 3, 3.3, 5 1.22 New SO-8, Very Low Noise, Self-Protected
800mA LT1129 0.4V 30V 50µA Adj, 3.3, 5 3.750 94:4-125 DD, SOT-223, S8, Self-Protection
LT1117 1.1V 15V 10mA* Adj, 2.85, 3.3, 5 1.250 94:4-85 DD, SOT-223;
LT1118 1V 15V 600µA 2.5, 2.85, 5 — 95:4-64 Can Also Sink 400mA, SOT-223, DD
For Active Terminal of SCSI Lines
1A LT1005 2V 20V 4mA 5 — 90:4-17 Logic Controlled, Dual Output
1.5A LT1086 1.3V 25V 5mA* Adj, 2.85, 3.3, 3.6, 5, 12 1.250 94:4-72 Also DD Pkg, 3 Terminals, 0.015% Line Regulation
3A LT1764
†††
0.34V 20V 1mA Adj, 1.8, 2.5, 3.3 1.21 New DD, TO-220 Packages, Fast Transient Response
LT1035 2.2V 20V 5mA 5V/3A, 5V/75mA — 90:4-57 Logic Controlled, Dual Output
LT1036 2.4V 30V 5.5mA 12V/3A, 5V/75mA — 90:4-69 Logic Controlled, Dual Output
LT1085 1.3V 25V 5mA* Adj, 3.3, 3.6, 5, 12 1.250 94:4-48 Also DD; Handles Surge Currents to 100A
LT1587 1.1V 7V 13mA Adj, 1.5, 3.3, 3.45, 3.6 1.250 95:4-112 Fast Transient Response, DD, TO-220
LT1528 0.6V 15V 400µA Adj, 3.3 3.300 95:4-91 Fast Transient Response, Shutdown, DD, TO-220
LT1529 0.5V 15V 50µA Adj, 3.3, 5 3.750 95:4-101 Shutdown, DD, TO-220
4A LT1585 1.1V 7V 13mA 3.38, 3.45, 3.6 1.250 96:4-65 Fast Transient Response, DD, TO-220
4.6A LT1585 1.1V 7V 13mA Adj, 1.5, 3.3 1.250 96:4-65 Fast Transient Response, DD, TO-220
5A LT1585A 1.1V 7V 13mA Adj, 1.5, 3.3 1.250 96:4-65 For Low Voltage Microprocessors
LT1003 2.5V 20V 20mA 5 — 90:4-9 5A Version of 323
LT1084 1.3V 25V 5mA* Adj, 3.3, 5, 12 1.250 94:4-48 Pin Compatible with Std. 3-Terminal Regulators
LT1087 1.3V 25V 5mA* Adjustable 1.250 92:4-56 LT1084 with Kelvin-Sense Inputs
7A LT1584 1.1V 7V 13mA Adj, 3.3, 3.38, 3.45, 3.6 1.250 95:4-112 Fast Transient Response, Shutdown, DD, TO-220
LT1580 0.54V 6V 10mA Adj, 2.5 1.250 96:4-54 Also DD Package, Remote Sense, Fast Transient
7.5A LT1083 1.3V 25V 5mA* Adj, 3.3, 3.6, 5, 12 1.250 94:4-48 0.015% Line Regulation, 0.01% Load Regulation
10A LT1038 3V 35V * Adjustable 1.25 90:4-77 Improved std., Guaranteed Tolerance, Regulation
LT1581 0.43V 6V 10mA Adj, 2.5 1.250 97:4-57 Fast Transient Response, Remote Sense
Positive Regulators
✝LT1123 ✝30V 700µA 5 — 92:4-75 SOT-223, TO92, 1% Output Tolerance
✝LT1573 ✝10V 3.5mA Adj, 2.5, 2.8, 3.3 1.265 95:4-385 Also S8, Fast Transient Response
✝LT1575 ✝22V 19mA Adj, 1.5, 2.8, 3.3, 5 1.210 97:4-42 Drives Low Cost N-Channel MOSFETs
✝LT1577 ✝22V 19mA Adj, 2.8, 3.3 — 97:4-42 No Need for Tantalum or Electrolytics
* The values given are for fixed output versions. All adjustable versions can be configured so that quiescent current flows into the load, for increased efficiency.
†
Maximum output current and dropout voltage are dependent upon pass element power transistor chosen.
††
Reference voltage for adjustable regulators.
†††
New product.
Discrete Pass Element Drivers and Regulators - Very Low Dropout
500mA LT337AH 3V 40V * Adjustable –1.25 Guaranteed Tolerance and Regulation
800mA LT1175 0.45V 20V 65µA Adj, 5 –3.8 95:4-68 DD, S8, SOT-223, Precision DC Characteristics
1.5A LT337A 3V 40V * Adjustable –1.250
TO-220 and TO-3 Packages, Guaranteed Regulation
3A LT1033 3V 35V * Adjustable –1.250 90:4-49 Guaranteed Tolerance and Regulation
LT1185 0.8V 35V 3.5mA Adjustable –2.37 92:4-86 Programmable Current Limit, Remote Sense
Negative Regulators
Linear Regulators
InfoCard 10
3
DROPOUT EXTERNAL DATABOOK
I
OUT
(mA) PART NUMBER VOLTAGE COMPONENTS* REFERENCE FEATURES
100 LT1761 0.3V 2C, c New Very Low Noise, SOT-23, MSOP-8
125 LT1120 0.4V 2C, c 94:4-107 Remote Sense, Shutdown, Low Battery, SO-8
150 LT1762 0.3V 2C, c New Very Low Noise, MSOP-8
150 LT1121 0.4V 2C 94:4-114 Shutdown, S0-8, MSOP-8, SOT-223
300 LT1521 0.5V 2c 94:5-79 MSOP, SO-8, SOT-223, Stable with Small Output Cap
500 LT1763 0.3V 2C, c New Very Low Noise, SO-8
700 LT1129 0.4V 2c 94:4-125 Shutdown, SO-8, SOT-223, DD, TO-220
800 LT1117 1.1V 2C 94:4-85 SOT-223, DD, SO-8
LT1118 1V 2C 95:4-64 Can Also Sink 400mA, SOT-223, DD
1.5A LT1086 1.3V 2C 94:4-72 DD, TO-220, 0.015% Line Regulation
3A LT1764 0.34V 2C New Fast Transient Response, DD, TO-220
LT1529 0.5V 2C 95:4-101 Shutdown, DD, TO-220
LT1528 0.6V 2C 95:4-91 Fast Transient Response, Shutdown, DD, TO-220
LT1587 1.1V 2C 95:4-112 Fast Transient Response, DD, TO-220
4.6A LT1585 1.1V 2C 96:4-65 Fast Transient Response, DD, TO-220
5A LT1585A 1.1V 2C 96:4-65 Fast Transient Response, DD, TO-220
7A LT1584 1.1V 2C 95:4-112 Fast Transient Response, DD, TO-220
LT1580 0.5V 2C 96:4-54 Remote Sense, Fast Transient Response, DD, T
10A LT1581 1V 2C 97:4-57 Remote Sense, Fast Transient Response, T
Linear Regulators for 5V Input to 3V or 3.3V Output
Easy 5V to V
CC
Linear Regulators for Desktop Microprocessors
I
OUT
1.5V 1.8V 2.5V 3.3V 3.38V 3.45V 3.6V
1.5A LT1086 LT1086 LT1086 LT1086-3.3 LT1086 LT1086 LT1086-3.6
3A LT1764 LT1764-1.8 LT1764-2.5 LT1764-3.3 LT1764 LT1764 LT1764
LT1587-1.5 LT1764-1.8 LT1580-2.5 LT1587-3.3 LT1528 LT1587-3.45 LT1587-3.6
LT1587 LT1528 LT1528 LT1528
4A LT1585-1.5 LT1585 LT1580-2.5 LT1585-3.3 LT1585-3.38 LT1585-3.45 LT1585-3.6
4.6A LT1585-1.5 LT1585 LT1580-2.5 LT1585-3.3 LT1585-3.38 LT1585-3.45 LT1585-3.6
5A LT1585A-1.5 LT1585A LT1580-2.5 LT1585A-3.3 — — —
7A LT1083 LT1083 LT1580-2.5 LT1584-3.3 LT1584-3.38 LT1584-3.45 LT1584-3.6
LT1584 LT1580 LT1580
7.5A LT1581 LT1581 LT1581-2.5 LT1083 LT1083 LT1083 LT1083
10A LT1581 LT1581 LT1581-2.5 LT1581 LT1581 LT1581 LT1581
5V or 3.3V V
CC
for µP
Low Dropout Regulator
5V V
CC
for µP
*C is a tantalum or other low ESR capacitor. c is a ceramic capacitor.
** Price shown is unit price (lowest cost package version) when purchased in quantities of 1000.
Bold denotes new product.
See also switching regulators for this application.
Linear Regulators
InfoCard 10
Linear Technology Corporation • 1630 McCarthy Blvd. • Milpitas, CA 95035-7417 • (408) 432-1900 • www.linear-tech.com • Literature Only: 1-800-4-LINEAR
ic10h ©1992 LT/TP 1299 4K
LT1761, LT1762, LT1763 100mA, 150mA and 500mA,
Low Noise, LDO Micropower Regulators
■5-Lead SOT-23 Package (LT1761)
■Low Noise: 20µV
RMS
(10Hz to 100kHz)
■Low Quiescent Current: 20µA to 30µA
■Wide Input Voltage Range: 1.8V to 20V
■Low Dropout Voltage: 300mV
■Very Low Shutdown Current: < 1µA
■No Protection Diodes Needed
■Fixed Output Voltages: 2.5V, 3V, 3.3V, 5V; 1.8V, 2V and 2.8V (LT1761)
■Adjustable Output from 1.22V to 20V
■Stable with 3.3µF Output Capacitor
■Stable with Aluminum, Tantalum or
Ceramic Capacitors
■Reverse Battery Protection
■No Reverse Current
■Overcurrent and Overtemperature Protected
■8-Lead SO Package (LT1763)
■8-Lead MSOP Package (LT1762)
■Optimized for Fast Transient
Response
■Output Current: 3A
■Dropout Voltage: 340mV
■1mA Quiescent Current
■No Protection Diodes Needed
■Controlled Quiescent Current
in Dropout
■Fixed Output Voltages:
1.8V, 2.5V, 3.3V
■Adjustable Output from
1.21V to 20V
■<1µA Quiescent Current in Shutdown
■Stable with 10µF Output Capacitor
■Stable with Ceramic Capacitors
■Reverse-Battery Protection
■No Reverse Current
■Thermal Limiting
FREQUENCY (Hz)
10k
1418_02a.EPS
10
1
0.1
0.01 10 100 1k 100k
OUTPUT VOLTAGE NOISE (µV/√Hz)
COMPETITOR 1
COMPETITOR 2
COMPETITOR 3
FREQUENCY (Hz)
10k
1418_02a.EPS
10
1
0.1
0.01 10 100 1k 100k
OUTPUT VOLTAGE NOISE (µV/√Hz)
LT1761
LT1761-3.3
LT1761-5
IN
SHDN
0.01µF
10µF
1763 TA01
OUT
SENSE
V
IN
3.7V TO
20V
BYP
GND
LT1763-3.3
3.3V AT 500mA
20µV
RMS
NOISE
1µF
+
IN
SHDN
10µF
1764 TA01
OUT
VIN > 3V
SENSE
GND
LT1764-2.5
2.5V
3A
10µF
++
LOAD CURRENT (A)
0 0.5
DROPOUT VOLTAGE (mV)
1.0 2.01.5 2.5 3.0
1764 TA02
400
350
300
250
200
150
100
50
0
3.3V Low Noise Regulator
Competing Devices’ Noise
Spectral Density
LT1761 Noise Spectral Density
LT1764 Series 3A, Low Dropout, Fast Transient Response Regulators
Dropout Voltage
3.3V to 2.5V Regulator
SOT-23
