LT3022IMSE-1.5 - Linear Technology Corporation

LT3022/LT3022-1.2

LT3022-1.5/LT3022-1.8

3022fb

TYPICAL APPLICATION

FEATURES DESCRIPTION

1A, 0.9V to 10V,

Very Low Dropout

Linear Regulator

The LT

3022 is a very low dropout voltage (VLDO™) linear

regulator that operates from single input supplies down to

0.9V. The device supplies 1A output current with 145mV

typical dropout voltage. The LT3022 is ideal for low input

voltage to low output voltage applications, providing

comparable electrical efﬁciency to a switching regulator.

The regulator optimizes stability and transient response

with low ESR ceramic output capacitors as small as 10µF.

Other LT3022 features include 0.05% typical line regulation

and 0.05% typical load regulation. In shutdown, quiescent

current typically drops to 7.5µA. Internal protection circuitry

includes reverse-battery protection, current limiting, ther-

mal limiting with hysteresis and reverse-current protection.

The LT3022 is available as an adjustable device with

an output voltage range down to the 200mV reference.

Three ﬁxed output voltages, 1.2V, 1.5V and 1.8V are also

offered. The LT3022 regulator is available in the thermally

enhanced low proﬁle (0.75mm) 16-lead (5mm × 3mm)

DFN and MSOP packages.

1.2V to 0.9V, 1A VLDO Regulator

APPLICATIONS

n VIN Range: 0.9V to 10V

n Dropout Voltage: 145mV Typical

n Output Current: 1A

n Adjustable Output (VREF = VOUT(MIN) = 200mV)

n Fixed Output Voltages: 1.2V, 1.5V, 1.8V

n Stable with Low ESR, Ceramic Output Capacitors

(10µF Minimum)

n 0.05% Typical Load Regulation from 1mA to 1A

n Quiescent Current: 400µA Typical

n 7.5µA Typical Quiescent Current in Shutdown

n Current Limit Protection

n Reverse-Battery Protection with No Reverse Current

n Thermal Limiting with Hysteresis

n 16-Lead (5mm × 3mm) DFN and MSOP Packages

n High Efﬁciency Linear Regulators

n Battery-Powered Systems

n Logic Supplies

n Post Regulator for Switching Supplies

n Wireless Modems

n FPGA Core Supplies

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. VLDO is a trademark of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

10µF

VIN

1.2V

VOUT

0.9V

LT3022

SHDN

698Ω

200Ω

OUT

ADJ

GND

10µF

3022 TA01a

Minimum Input Voltage

TEMPERATURE (°C)

–50

MINIMUM INPUT VOLTAGE (V)

0.3

0.9

1.0

1.1

050 75

3022 TA01b

0.1

0.7

0.5

0.2

0.8

0.6

0.4

–25 25 100 125

IL = 1A

LT3022/LT3022-1.2

LT3022-1.5/LT3022-1.8

3022fb

ABSOLUTE MAXIMUM RATINGS

IN Pin Voltage ........................................................ ±10V

OUT Pin Voltage ..................................................... ±10V

Input-to-Output Differential Voltage ....................... ±10V

ADJ/SENSE Pin Voltage ......................................... ±10V

SHDN Pin Voltage .................................................. ±10V

Output Short-Circuit Duration ......................... Indeﬁnite

(Note 1)

Operating Junction Temperature Range

E-, I-Grades (Notes 2, 3) ................... –40°C to 125°C

Storage Temperature Range ................. –65°C to 150°C

Lead Temperature (Soldering, 10 sec)

MSOP Package ................................................ 300°C

GND

PGND

SHDN

OUT

ADJ

AGND

TOP VIEW

DHC PACKAGE

16-LEAD (5mm × 3mm) PLASTIC DFN

TJMAX = 125°C, qJA = 38°C/W*, qJC = 4°C/W

EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB

*SEE THE APPLICATIONS INFORMATION SECTION

OUT

ADJ/SENSE*

AGND

PGND

SHDN

TOP VIEW

MSE PACKAGE

16-LEAD PLASTIC MSOP

GND

TJMAX = 125°C, qJA = 38°C/W**, qJC = 5°C/W TO 10°C/W

EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB

*PIN 5: ADJ FOR LT3022

SENSE FOR LT3022-1.2/LT3022-1.5/LT3022-1.8

**SEE THE APPLICATIONS INFORMATION SECTION

PIN CONFIGURATION

LT3022/LT3022-1.2

LT3022-1.5/LT3022-1.8

3022fb

ORDER INFORMATION

LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE

LT3022EDHC#PBF LT3022EDHC#TRPBF 3022 16-Lead (5mm × 3mm) Plastic DFN –40°C to 125°C

LT3022IDHC#PBF LT3022IDHC#TRPBF 3022 16-Lead (5mm × 3mm) Plastic DFN –40°C to 125°C

LT3022EMSE#PBF LT3022EMSE#TRPBF 3022 16-Lead Plastic MSOP –40°C to 125°C

LT3022IMSE#PBF LT3022IMSE#TRPBF 3022 16-Lead Plastic MSOP –40°C to 125°C

LT3022EMSE-1.2#PBF LT3022EMSE-1.2#TRPBF 302212 16-Lead Plastic MSOP –40°C to 125°C

LT3022IMSE-1.2#PBF LT3022IMSE-1.2#TRPBF 302212 16-Lead Plastic MSOP –40°C to 125°C

LT3022EMSE-1.5#PBF LT3022EMSE-1.5#TRPBF 302215 16-Lead Plastic MSOP –40°C to 125°C

LT3022IMSE-1.5#PBF LT3022IMSE-1.5#TRPBF 302215 16-Lead Plastic MSOP –40°C to 125°C

LT3022EMSE-1.8#PBF LT3022EMSE-1.8#TRPBF 302218 16-Lead Plastic MSOP –40°C to 125°C

LT3022IMSE-1.8#PBF LT3022IMSE-1.8#TRPBF 302218 16-Lead Plastic MSOP –40°C to 125°C

LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE

LT3022EDHC LT3022EDHC#TR 3022 16-Lead (5mm × 3mm) Plastic DFN –40°C to 125°C

LT3022IDHC LT3022IDHC#TR 3022 16-Lead (5mm × 3mm) Plastic DFN –40°C to 125°C

LT3022EMSE LT3022EMSE#TR 3022 16-Lead Plastic MSOP –40°C to 125°C

LT3022IMSE LT3022IMSE#TR 3022 16-Lead Plastic MSOP –40°C to 125°C

LT3022EMSE-1.2 LT3022EMSE-1.2#TR 302212 16-Lead Plastic MSOP –40°C to 125°C

LT3022IMSE-1.2 LT3022IMSE-1.2#TR 302212 16-Lead Plastic MSOP –40°C to 125°C

LT3022EMSE-1.5 LT3022EMSE-1.5#TR 302215 16-Lead Plastic MSOP –40°C to 125°C

LT3022IMSE-1.5 LT3022IMSE-1.5#TR 302215 16-Lead Plastic MSOP –40°C to 125°C

LT3022EMSE-1.8 LT3022EMSE-1.8#TR 302218 16-Lead Plastic MSOP –40°C to 125°C

LT3022IMSE-1.8 LT3022IMSE-1.8#TR 302218 16-Lead Plastic MSOP –40°C to 125°C

Consult LTC Marketing for parts speciﬁed with wider operating temperature ranges. *The temperature grade is identiﬁed by a label on the shipping container.

For more information on lead free part marking, go to: http://www.linear.com/leadfree/

For more information on tape and reel speciﬁcations, go to: http://www.linear.com/tapeandreel/

LT3022/LT3022-1.2

LT3022-1.5/LT3022-1.8

3022fb

ELECTRICAL CHARACTERISTICS

The l denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C.

PARAMETER CONDITIONS MIN TYP MAX UNITS

Minimum Input Voltage (Notes 4, 6) ILOAD = 1A, TA > 0°C

ILOAD = 1A, TA ≤ 0°C

0.9

1.05

1.10

ADJ Pin Voltage (Notes 5, 6) VIN = 1.5V, ILOAD = 1mA

1.15V < VIN < 10V, 1mA < ILOAD < 1A

196

194

200

204

206

Regulated Output Voltage (Note 5) LT3022-1.2 VIN = 1.5V, ILOAD = 1mA

1.5V < VIN < 10V, 1mA < ILOAD <1A

1.176

1.164

1.200

1.224

1.236

LT3022-1.5 VIN = 1.8V, ILOAD = 1mA

1.8V < VIN < 10V, 1mA < ILOAD <1A

1.470

1.455

1.500

1.530

1.545

LT3022-1.8 VIN = 2.1V, ILOAD = 1mA

2.1V < VIN < 10V, 1mA < ILOAD <1A

1.764

1.746

1.800

1.836

1.854

Line Regulation (Note 7) LT3022 ∆VIN = 1.15V to 10V, ILOAD = 1mA

LT3022-1.2 ∆VIN = 1.5V to 10V, ILOAD = 1mA

LT3022-1.5 ∆VIN = 1.8V to 10V, ILOAD = 1mA

LT3022-1.8 ∆VIN = 2.1V to 10V, ILOAD = 1mA

–1.5

–9

–11

–13.5

–0.1

0.6

0.8

0.5

3.5

Load Regulation (Note 7) LT3022 VIN = 1.15V, ∆ILOAD = 1mA to 1A

–0.5

–1.0

0.1 0.5

1.0

LT3022-1.2 VIN = 1.5V, ∆ILOAD = 1mA to 1A

–3

–6

0.6 3

LT3022-1.5 VIN = 1.8V, ∆ILOAD = 1mA to 1A

–3.8

–7.5

1 3.8

7.5

LT3022-1.8 VIN = 2.1V, ∆ILOAD = 1mA to 1A

–4.5

–9

1.2 4.5

Dropout Voltage (Notes 8, 9) ILOAD = 10mA

45 75

135

ILOAD = 100mA

55 90

175

ILOAD = 500mA

110 150

235

ILOAD = 1A

145 185

285

GND Pin Current, VIN = VOUT(NOMINAL) + 0.4V

(Notes 9, 10)

ILOAD = 0mA

ILOAD = 1mA

ILOAD = 100mA

ILOAD = 500mA

ILOAD = 1A

400

1.2

3.4

8.3

3.5

8.5

µA

Output Voltage Noise COUT = 10µF, ILOAD = 1A, BW = 10Hz to 100kHz,

VOUT = 1.2V

165 µVRMS

ADJ Pin Bias Current (Notes 7, 11) VADJ = 0.2V, VIN = 1.5V 30 100 nA

Shutdown Threshold VOUT = Off to On

VOUT = On to Off

0.25

0.64

0.9 V

SHDN Pin Current (Note 12) VSHDN = 0V, VIN = 10V

VSHDN = 10V, VIN = 10V

±1

9.5

µA

Quiescent Current in Shutdown VIN = 6V, VSHDN = 0V 7.5 15 µA

LT3022/LT3022-1.2

LT3022-1.5/LT3022-1.8

3022fb

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LT3022 regulator is tested and speciﬁed under pulse load

conditions such that TJ ≈ TA. The LT3022 is 100% tested at TA = 25°C.

Performance of the LT3022E over the full –40°C and 125°C operating

junction temperature range is assured by design, characterization and

correlation with statistical process controls. The LT3022I regulators are

guaranteed over the full –40°C to 125°C operating junction temperature

range. High junction temperatures degrade operating lifetime. Operating

lifetime is derated at junction temperatures greater than 125°C.

Note 3: This IC includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

temperature will exceed 125°C when overtemperature protection is active.

Continuous operation above the speciﬁed maximum operating junction

temperature may impair device reliability.

Note 4: Minimum input voltage is the voltage required by the LT3022 to

regulate the output voltage and supply the rated 1A output current. This

speciﬁcation is tested at VOUT = 0.2V. For higher output voltages, the

minimum input voltage required for regulation equals the regulated output

voltage VOUT plus the dropout voltage or 1.1V, whichever is greater.

Note 5: Maximum junction temperature limits operating conditions. The

regulated output voltage speciﬁcation does not apply for all possible

combinations of input voltage and output current. Limit the output current

range if operating at maximum input voltage. Limit the input-to-output

voltage differential range if operating at maximum output current.

Note 6: The LT3022 typically supplies 1A output current with a 0.9V input

supply. The guaranteed minimum input voltage for 1A output current is

1.10V, especially if cold temperature operation is required.

Note 7: The LT3022 is tested and speciﬁed for these conditions with ADJ

tied to OUT. Speciﬁcations for ﬁxed output voltage devices are referred to

the output voltage.

Note 8: Dropout voltage is the minimum input to output voltage differential

needed to maintain regulation at a speciﬁed output current. In dropout the

output voltage equals: (VIN – VDROPOUT).

Note 9: The LT3022 is tested and speciﬁed for these conditions with

an external resistor divider (3.92k and 19.6k) setting VOUT to 1.2V. The

external resistor divider adds 50µA of load current.

Note 10: GND pin current is tested with VIN = VOUT(NOMINAL) + 0.4V and a

current source load. GND pin current increases in dropout. See GND pin

current curves in the Typical Performance Characteristics section.

Note 11: Adjust pin bias current ﬂows out of the ADJ pin.

Note 12: Shutdown pin current ﬂows into the SHDN pin.

Note 13: The LT3022 is tested and speciﬁed for this condition with an

external resistor divider (3.92k and 5.9k) setting VOUT to 0.5V. The external

resistor divider adds 50µA of load current. The speciﬁcation refers to

the change in the 0.2V reference voltage, not the 0.5V output voltage.

Speciﬁcations for ﬁxed output voltage devices are referred to the output

voltage.

Note 14: Input reverse leakage current ﬂows out of the IN pin.

Note 15: Reverse output current is tested with IN grounded and OUT

forced to the rated output voltage. This current ﬂows into the OUT pin and

out of the GND pin.

Note 16: Reverse current is higher for the case of (rated_output)

< VOUT < VIN, because the no-load recovery circuitry is active in this region

and is trying to restore the output voltage to its nominal value.

PARAMETER CONDITIONS MIN TYP MAX UNITS

Ripple Rejection (Note 13) LT3022 VIN – VOUT = 1V, VRIPPLE = 0.5VP-P

fRIPPLE = 120Hz, ILOAD = 1A

55 70 dB

LT3022-1.2 VIN – VOUT = 1V, VRIPPLE = 0.5VP-P

fRIPPLE = 120Hz, ILOAD = 1A

51 66 dB

LT3022-1.5 VIN – VOUT = 1V, VRIPPLE = 0.5VP-P

fRIPPLE = 120Hz, ILOAD = 1A

51 66 dB

LT3022-1.8 VIN – VOUT = 1V, VRIPPLE = 0.5VP-P

fRIPPLE = 120Hz, ILOAD = 1A

51 66 dB

Current Limit (Note 9) VIN = 10V, VOUT = 0V

VIN = VOUT(NOMINAL) + 0.5V, ∆VOUT ≤ –5%

1.1

2.6

1.7

Input Reverse Leakage Current (Note 14) VIN = –10V, VOUT = 0V 4 40 µA

Reverse Output Current (Notes 15, 16) LT3022 VOUT = 1.2V, VIN = 0V

LT3022-1.2 VOUT = 1.2V, VIN = 0V

LT3022-1.5 VOUT = 1.5V, VIN = 0V

LT3022-1.8 VOUT = 1.8V, VIN = 0V

0.1

µA

Minimum Required Output Current VIN = 1.6V, VOUT = 1.2V l1 mA

ELECTRICAL CHARACTERISTICS

The l denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C.

LT3022/LT3022-1.2

LT3022-1.5/LT3022-1.8

3022fb

TYPICAL PERFORMANCE CHARACTERISTICS

Minimum Input Voltage ADJ Pin Voltage

Dropout Voltage Guaranteed Dropout Voltage Dropout Voltage

OUTPUT CURRENT (mA)

DROPOUT VOLTAGE (mV)

180

240

300

800

3022 G01

120

150

210

270

0200100 400300 600 700 900

500 1000

TJ = 125°C

VOUT = 1.2V

TJ = –40°C

TJ = 25°C

OUTPUT CURRENT (mA)

GUARANTEED DROPOUT VOLTAGE (mV)

180

240

300

800

3022 G02

120

150

210

270

0200100 400300 600 700 900

500 1000

TJ = 125°C

TJ = 25°C

= TEST POINTS

TEMPERATURE (°C)

–50

DROPOUT VOLTAGE (mV)

120

150

300

210

050 75

3022 G03

240

270

180

–25 25 100 125

VOUT = 1.2V

IL = 1A

IL = 500mA

IL = 100mA

IL = 10mA

TEMPERATURE (°C)

–50

MINIMUM INPUT VOLTAGE (V)

0.3

0.9

1.0

1.1

050 75

3022 G04

0.1

0.7

0.5

0.2

0.8

0.6

0.4

–25 25 100 125

IL = 1A

TEMPERATURE (°C)

–50

ADJ PIN VOLTAGE (mV)

202

204

206

25 75

3022 G05

200

198

–25 0 50 100 125

196

194

IL = 1mA

TEMPERATURE (°C)

–50

OUTPUT VOLTAGE (V)

1.212

1.224

1.236

050 75

3022 G05a

1.176

1.188

1.200

1.164

–25 25 100 125

IL = 1mA

TEMPERATURE (°C)

–50

OUTPUT VOLTAGE (V)

1.515

1.530

1.545

050 75

3022 G05b

1.470

1.485

1.500

1.455

–25 25 100 125

IL = 1mA

TEMPERATURE (°C)

–50

OUTPUT VOLTAGE (V)

1.818

1.836

1.854

050 75

3022 G05c

1.764

1.782

1.800

1.746

–25 25 100 125

IL = 1mA

Output Voltage

Output Voltage Output Voltage

LT3022/LT3022-1.2

LT3022-1.5/LT3022-1.8

3022fb

TYPICAL PERFORMANCE CHARACTERISTICS

Quiescent Current Quiescent Current GND Pin Current

GND Pin Current GND Pin Current

ADJ Pin Bias Current Quiescent Current Quiescent Current

TEMPERATURE (°C)

–50

ADJ PIN BIAS CURRENT (nA)

100

050 75

3022 G06

–25 25 100 125

TEMPERATURE (°C)

–50

QUIESCENT CURRENT (µA)

100

300

400

500

1000

700

050 75

3022 G07

200

800

900

600

–25 25 100 125

VIN = 6V

VOUT = 1.2V

IL = 0

VSHDN = VIN

VSHDN = 0V

INPUT VOLTAGE (V)

QUIESCENT CURRENT (mA)

3.0

4.0

5.0

3022 G08

2.0

1.0

2.5

3.5

4.5

1.5

0.5

021 43 6 7 9

510

VSHDN = VIN

VSHDN = 0V

VOUT = 1.2V

IL = 0

TJ = 25°C

INPUT VOLTAGE (V)

QUIESCENT CURRENT (mA)

3.0

4.0

5.0

3022 G09

2.0

1.0

2.5

3.5

4.5

1.5

0.5

021 43 6 7 9

510

VSHDN = VIN

VSHDN = 0V

VOUT = 1.5V

IL = 0

TJ = 25°C

INPUT VOLTAGE (V)

QUIESCENT CURRENT (mA)

3.0

4.0

5.0

3022 G10

2.0

1.0

2.5

3.5

4.5

1.5

0.5

021 43 6 7 9

510

VSHDN = VIN

VSHDN = 0V

VOUT = 1.8V

IL = 0

TJ = 25°C

INPUT VOLTAGE (V)

GND PIN CURRENT (mA)

3022 G11

2 4 6 1071 3 5 9

RL = 1.2Ω

IL = 1A

RL = 2.4Ω

IL = 500mA RL = 120Ω

IL = 10mA

RL = 12Ω

IL = 100mA

RL = 1.2k

IL = 1mA

VOUT = 1.2V

TJ = 25°C

INPUT VOLTAGE (V)

GND PIN CURRENT (mA)

3022 G12

2 4 6 1071 3 5 9

RL = 1.5Ω

IL = 1A

RL = 3Ω

IL = 500mA RL = 150Ω

IL = 10mA

RL = 15Ω

IL = 100mA

VOUT = 1.5V

TJ = 25°C

RL = 1.5k

IL = 1mA

INPUT VOLTAGE (V)

GND PIN CURRENT (mA)

3022 G13

2 4 6 1071 3 5 9

RL = 1.8Ω

IL = 1A

RL = 3.6Ω

IL = 500mA

RL = 18Ω

IL = 100mA

VOUT = 1.8V

TJ = 25°C

RL = 180Ω

IL = 10mA

RL = 1.8k

IL = 1mA

LT3022/LT3022-1.2

LT3022-1.5/LT3022-1.8

3022fb

TYPICAL PERFORMANCE CHARACTERISTICS

SHDN Pin Input Current Current Limit Reverse Input Leakage Current

Reverse Input Leakage Current Reverse Output Current Input Ripple Rejection

GND Pin Current vs ILOAD SHDN Pin Threshold SHDN Pin Input Current

LOAD CURRENT (mA)

GND PIN CURRENT (mA)

0800

3022 G14

200 400 600 1000700100 300 500 900

VIN = 1.6V

VOUT = 1.2V

VSHDN = 10V

TJ = 25°C

TEMPERATURE (°C)

–50

SHDN PIN THRESHOLD (V)

0.1

0.3

0.4

0.5

1.0

0.7

050 75

3022 G15

0.2

0.8

0.9

0.6

–25 25 100 125

IL = 1mA

SHDN PIN VOLTAGE (V)

SHDN PIN INPUT CURRENT (µA)

3.0

4.0

5.0

3022 G16

2.0

1.0

2.5

3.5

4.5

1.5

0.5

021 43 6 7 9

510

TJ = 25°C

TEMPERATURE (°C)

–50

SHDN PIN INPUT CURRENT (µA)

25 75

3022 G17

–25 0 50 100 125

VIN = 10V

VSHDN = 10V

TEMPERATURE (°C)

–50

CURRENT LIMIT (A)

0.3

0.9

1.2

1.5

3.0

2.1

050 75

3022 G18

0.6

2.4

2.7

1.8

–25 25 100 125

VOUT = 0V

VIN = 10V

VIN = 1.7V

INPUT VOLTAGE (V)

INPUT CURRENT (µA)

–8

–4

–8

3022 G19

–12

–16

–10

–6

–2

–14

–18

–20 –2–1 –4–3 –6 –7 –9

–5 –10

VOUT = 0V

VSHDN = 10V

TJ = 25°C

TEMPERATURE (°C)

–50

–20

INPUT CURRENT (µA)

–18

–14

–12

–10

–6

050 75

3022 G20

–16

–4

–2

–8

–25 25 100 125

VIN = –10V

VOUT = 0V

VSHDN = 10V

TEMPERATURE (°C)

–50

REVERSE OUTPUT CURRENT (µA)

100

120

25 75

3022 G21

–25 0 50 100 125

VIN = 0V

VOUT = 1.2V

IOUT FLOWS INTO OUT PIN

IIN FLOWS OUT OF IN PIN

IOUT

IIN

FREQUENCY (Hz)

10 100

INPUT RIPPLE REJECTION (dB)

1k 10k 100k 1M 10M

3022 G22

100

COUT = 47µF

COUT = 10µF

VIN = 1.5V + 50mVRMS RIPPLE

VOUT = 0.5V

IL = 1A

TJ = 25°C

LT3022/LT3022-1.2

LT3022-1.5/LT3022-1.8

3022fb

TYPICAL PERFORMANCE CHARACTERISTICS

No-Load Recovery Threshold No-Load Recovery Threshold Output Noise Spectral Density

RMS Output Noise vs Load

Current (10Hz to 100kHz) Start-Up from Shutdown Transient Response

Input Ripple Rejection Line Regulation Load Regulation

TEMPERATURE (°C)

–50

INPUT RIPPLE REJECTION (dB)

100

050 75

3022 G23

–25 25 100 125

VIN = 1.5V + 0.5VP-P RIPPLE AT 120Hz

VOUT = 0.5V

COUT = 10µF

IL = 1A

TEMPERATURE (°C)

–50

–1.5

LINE REGULATION (mV)

–1.3

–0.9

–0.7

–0.5

0.5

–0.1

050 75

3022 G24

–1.1

0.1

0.3

–0.3

–25 25 100 125

∆VIN = 1.15V TO 10V

VOUT = 0.2V

IL = 1mA

TEMPERATURE (°C)

–50

–1.0

LOAD REGULATION (mV)

–0.8

–0.4

–0.2

1.0

0.4

050 75

3022 G25

–0.6

0.6

0.8

0.2

–25 25 100 125

VIN = 1.15V

VOUT = 0.5V

∆IL = 1mA TO 1A

LOAD REGULATION NUMBER REFERS

TO CHANGE IN THE 200mV REFERENCE

VOLTAGE

OUTPUT OVERSHOOT (%)

OUTPUT SINK CURRENT (mA)

30 TJ = 25°C

5 10 15 20

3022 G26

TEMPERATURE (°C)

–50

OUTPUT OVERSHOOT (%)

25 75

3022 G27

–25 0 50 100 125

IOUT(SINK) = 5mA

IOUT(SINK) = 1mA

FREQUENCY (Hz)

0.1

OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz)

10 1k 10k 1M100k

3022 G28

0.001

0.01

100

10 VOUT = 1.2V

IL = 1A

TJ = 25°C

COUT = 47µF

COUT = 10µF

LOAD CURRENT (mA)

0.01

OUTPUT NOISE (µVRMS)

100

120

140

160

0.1 1 10 100 1000

3022 G29

180

200 VOUT = 1.2V

COUT = 10µF

TJ = 25°C

VOUT

0.5V/DIV

50µs/DIV 3022 G30

RL = 1.2Ω

VIN = 1.5V

VOUT = 1.2V

COUT = 10µF

VSHDN

1V/DIV

VOUT

50mV/DIV

50µs/DIV 3022 G31

VIN = 1.5V

VOUT = 1.2V

IOUT = 100mA to 1A

COUT = 22µF

tRISE = tFALL = 100ns

IOUT

500mA/DIV

LT3022/LT3022-1.2

LT3022-1.5/LT3022-1.8

3022fb

PIN FUNCTIONS

NC (Pins 1, 2, 8, 15, 16): No Connect Pins. These pins

have no connection to internal circuitry. These pins may

be ﬂoated, tied to VIN or tied to GND for improved thermal

performance.

OUT (Pins 3, 4): These pins supply power to the load.

Use a minimum output capacitor of 10µF to prevent

oscillations. Large load transient applications require larger

output capacitors to limit peak voltage transients. See the

Applications Information section for more information on

output capacitance and reverse-output characteristics. The

LT3022 requires a 1mA minimum load current to ensure

proper regulation and stability.

SENSE (Pin 5, Fixed Voltage Device Only): This pin is

the sense point for the internal resistor divider. It should

be tied directly to the OUT pins for best results.

ADJ (Pin 5): This pin is the error ampliﬁer inverting

terminal. Its 30nA typical input bias current ﬂows out of

the pin (see curve of ADJ Pin Bias Current vs Temperature

in the Typical Performance Characteristics). The ADJ pin

reference voltage is 200mV (referred to AGND).

AGND (Pins 6, 7): Analog Ground. Tie these pins directly

to PGND (Pins 10, 11) and the exposed backside GND

(Pin 17). Connect the bottom of the external resistor

divider, setting output voltage, directly to AGND for

optimum regulation.

SHDN (Pin 9): Pulling the SHDN pin low puts the LT3022

into a low power state and turns the output off. Drive the

SHDN pin with either logic or an open-collector/drain device

with a pull-up resistor. The resistor supplies the pull-up

current to the open collector/drain logic, normally several

microamperes, and the SHDN pin current, typically 3µA.

If unused, connect the SHDN pin to VIN. The LT3022 does

not function if the SHDN pin is not connected.

PGND (Pins 10, 11): Power Ground. The majority of

ground pin current ﬂows out of PGND. Tie these pins

directly to AGND (Pins 6, 7) and the exposed backside

GND (Pin 17).

IN (Pins 12, 13,14): These pins supply power to the device.

The LT3022 requires a bypass capacitor at IN if located

more than six inches from the main input ﬁlter capacitor.

Include a bypass capacitor in battery-powered circuits

as a battery’s output impedance rises with frequency. A

minimum bypass capacitor of 10µF sufﬁces. The LT3022

withstands reverse voltages on the IN pin with respect to

ground and the OUT pin. In the case of a reversed input,

which occurs if a battery is plugged in backwards, the

LT3022 behaves as if a diode is in series with its input.

No reverse current ﬂows into the LT3022 and no reverse

voltage appears at the load. The device protects itself and

the load.

GND (Pin 17): Exposed Pad. Tie this pin directly to AGND

(Pins 6, 7), PGND (Pins 10, 11) and the PCB ground.

This pin provides enhanced thermal performance with

its connection to the PCB ground. See the Applications

Information section for thermal considerations and

calculating junction temperature.

LT3022/LT3022-1.2

LT3022-1.5/LT3022-1.8

3022fb

BLOCK DIAGRAM

–

ERROR

AMP

NO-LOAD

RECOVERY

200mV

BIAS CURRENT

AND

REFERENCE

GENERATOR

213mV

IDEAL

DIODE

THERMAL

SHUTDOWN

SHDN

CURRENT

GAIN

12, 13, 14

3, 4

25k

PGND

10, 11

OUT

6, 7

AGND

3022 BD

ADJ 5

SENSE

FIXED

VOUT

1.2V

1.5V

1.8V

3.92k

19.6k

25.5k

31.4k

NOTE:

FOR LT3022 ADJ PIN (5) IS

CONNECTED TO THE ADJ PIN,

R1 AND R2 ARE EXTERNAL.

FOR LT3022-1.X PIN (5) IS

CONNECTED TO THE SENSE PIN,

R1 AND R2 ARE INTERNAL.

TIE PGND, AGND AND THE EXPOSED

PAD TOGETHER.

LT3022/LT3022-1.2

LT3022-1.5/LT3022-1.8

3022fb

APPLICATIONS INFORMATION

The LT3022 very low dropout linear regulator is capable of

0.9V input supply operation. It supplies 1A output current

and dropout voltage is typically 145mV. Quiescent current

is typically 400µA and drops to 7.5µA in shutdown. The

LT3022 incorporates several protection features, making

it ideal for use in battery-powered systems. The device

protects itself against reverse-input and reverse-output

voltages. If the output is held up by a backup battery when

the input is pulled to ground in a battery backup application,

the LT3022 behaves as if a diode is in series with its output,

preventing reverse current ﬂow. In dual supply applications

where the regulator load is returned to a negative supply,

pulling the output below ground by as much as 10V does

not affect start-up or normal operation.

Adjustable Operation

The LT3022’s output voltage range is 0.2V to 9.5V. Figure 1

shows that the external resistor ratio sets output voltage.

The device regulates the output to maintain ADJ at 200mV

referred to ground. R1’s current equals 200mV/R1. R2’s

current is R1’s current minus the ADJ pin bias current.

The 30nA ADJ pin bias current ﬂows out of the pin. Use

Figure 1’s formula to calculate output voltage. Given the

LT3022’s 1mA minimum load current requirement, Linear

Technology recommends choosing resistor divider values

to satisfy this requirement. A 200Ω R1 value sets a 1mA

resistor divider current. In shutdown, the output is off and

the divider current is zero. Curves of ADJ Pin Voltage vs

Temperature and ADJ Pin Bias Current vs Temperature appear

in the Typical Performance Characteristics section.

Speciﬁcations for output voltages greater than 200mV

are proportional to the ratio of desired output voltage to

200mV (VOUT/200mV). For example, load regulation for

an output current change of 1mA to 1A is typically 100µV

at VADJ = 200mV. At VOUT = 1.5V, load regulation is:

200 100 750

.•

mV µV µV=

Table 1 shows 1% resistor divider values for some common

output voltages with a resistor divider current equaling or

about 1mA.

Table 1

VOUT (V) R1 (Ω) R2 (Ω)

0.9 200 698

1.0 187 750

1.2 200 1000

1.5 200 1300

1.8 187 1500

2.5 187 2150

3.3 200 3090

VOUT: 200mV • (1 + R2/R1) – (IADJ • R2)

VADJ: 200mV

IADJ: 30nA AT 25°C

OUTPUT RANGE: 0.2V TO 9.5V

VIN

VOUT

LT3022

SHDN

OUT

ADJ

GND

3022 F01

Figure 1. Adjustable Operation

Output Capacitance and Transient Response

The LT3022’s design is stable with a wide range of output

capacitors, but is optimized for low ESR ceramic capacitors.

The output capacitor’s ESR affects stability, most notably

with small value capacitors. Use a minimum output

capacitor of 10µF with an ESR of less than 0.1Ω to prevent

oscillations. The LT3022 is a low voltage device and output

load transient response is a function of output capacitance.

Larger values of output capacitance decrease the peak

deviations and provide improved transient response for

large load current changes.

Ceramic capacitors require extra consideration. Manufac-

turers make ceramic capacitors with a variety of dielectrics;

each with a different behavior across temperature and

applied voltage. The most common dielectrics are Z5U,

Y5V, X5R and X7R. Z5U and Y5V dielectrics provide

high C-V products in a small package at low cost, but

exhibit strong voltage and temperature coefﬁcients. X5R

and X7R dielectrics yield highly stable characteristics

LT3022/LT3022-1.2

LT3022-1.5/LT3022-1.8

3022fb

APPLICATIONS INFORMATION

DC BIAS VOLTAGE (V)

CHANGE IN VALUE (%)

3022 F02

–20

–40

–60

–80

–100 04810

2 6 12 14

X5R

Y5V

BOTH CAPACITORS ARE 16V,

1210 CASE SIZE, 10µF

TEMPERATURE (°C)

–50

–20

–40

–60

–80

–100 25 75

3022 F03

–25 0 50 100 125

Y5V

CHANGE IN VALUE (%)

X5R

BOTH CAPACITORS ARE 16V,

1210 CASE SIZE, 10µF

Figure 3. Ceramic Capacitor Temperature Characteristics

Figure 2. Ceramic Capacitor DC Bias Characteristics

and are more suitable for use as the output capacitor at

fractionally increased cost. X5R and X7R dielectrics both

exhibit excellent voltage coefﬁcient characteristics. X7R

works over a larger temperature range and exhibits better

temperature stability whereas X5R is less expensive and

is available in higher values. Figures 2 and 3 show voltage

coefﬁcient and temperature coefﬁcient comparisons

between Y5V and X5R material.

Voltage and temperature coefﬁcients are not the only

sources of problems. Some ceramic capacitors have a

piezoelectric response. A piezoelectric device generates

voltage across its terminals due to mechanical stress,

similar to the way a piezoelectric accelerometer or

microphone works. For a ceramic capacitor, the stress can

be induced by vibrations in the system or thermal transients.

The resulting voltages produced can cause appreciable

amounts of noise. A ceramic capacitor produced Figure 4’s

trace in response to light tapping from a pencil. Similar

vibration induced behavior can masquerade as increased

output voltage noise.

1mV/DIV

1ms/DIV 3022 F04

VOUT = 1.3V

COUT = 10µF

ILOAD = 0

Figure 4. Noise Resulting from Tapping on a Ceramic Capacitor

No-Load/Light-Load Recovery

A possible transient load step that occurs is where the

output current changes from its maximum level to zero

current or a very small load current. The output voltage

responds by overshooting until the regulator lowers the

amount of current it delivers to the new level. The regulator

loop response time and the amount of output capacitance

control the amount of overshoot. Once the regulator has

decreased its output current, the current provided by

the resistor divider (which sets VOUT) is the only current

remaining to discharge the output capacitor from the level

to which it overshot. The amount of time it takes for the

output voltage to recover easily extends to milliseconds

with minimum divider current and many microfarads of

output capacitance.

LT3022/LT3022-1.2

LT3022-1.5/LT3022-1.8

3022fb

APPLICATIONS INFORMATION

To eliminate this problem, the LT3022 incorporates a

no-load or light load recovery circuit. This circuit is a

voltage-controlled current sink that signiﬁcantly improves

the light load transient response time by discharging the

output capacitor quickly and then turning off. The current

sink turns on when the output voltage exceeds 6.5% of

the nominal output voltage. The current sink level is then

proportional to the overdrive above the threshold up to a

maximum of about 24mA. Consult the curve in the Typical

Performance Characteristics for the No-Load Recovery

Threshold.

If external circuitry forces the output above the no-load

recovery circuit’s threshold, the current sink turns on in

an attempt to restore the output voltage to nominal. The

current sink remains on until the external circuitry releases

the output. However, if the external circuitry pulls the output

voltage above the input voltage or the input falls below the

output, the LT3022 turns the current sink off and shuts

down the bias current/reference generator circuitry.

Thermal Considerations

The LT3022’s maximum rated junction temperature of

125°C limits its power handling capability. Two components

comprise the power dissipation of the device:

1. Output current multiplied by the input-to-output voltage

differential:

(ILOAD) • (VIN – VOUT) and

2. GND pin current multiplied by the input voltage:

(IGND) • (VIN)

GND pin current is found by examining the GND pin current

curves in the Typical Performance Characteristics. Power

dissipation equals the sum of the two components listed.

The LT3022’s internal thermal limiting (with hysteresis)

protects the device during overload conditions. For normal

continuous conditions, do not exceed the maximum

junction temperature rating of 125°C. Carefully consider

all sources of thermal resistance from junction to ambient

including other heat sources mounted in proximity to the

LT3022.

The underside of the LT3022 DHC and MSE packages has

exposed metal from the lead frame to the die attachment.

Heat transfers directly from the die junction to the

printed circuit board metal, allowing maximum junction

temperature control. The dual-in-line pin arrangement

allows metal to extend beyond the ends of the package

on the topside (component side) of a PCB. Connect this

metal to GND on the PCB. The multiple IN and OUT pins

of the LT3022 also assist in spreading heat to the PCB.

Copper board stiffeners and plated throughholes can also

be used to spread the heat generated by power devices.

The following tables list thermal resistance as a function

of copper area in a ﬁxed board size. All measurements are

taken in still air on a 4-layer FR-4 board with 1oz solid

internal planes, and 2oz external trace planes with a total

board thickness of 1.6mm. For more information on thermal

resistance and high thermal conductivity test boards,

refer to JEDEC standard JESD51, notably JESD51-12 and

JESD51-7. Achieving low thermal resistance necessitates

attention to detail and careful PCB layout.

Table 2. Measured Thermal Resistance for DHC Package

COPPER AREA

BOARD AREA

THERMAL RESISTANCE

(JUNCTION-TO-AMBIENT)TOPSIDE* BACKSIDE

2500mm22500mm22500mm235°C/W

1000mm22500mm22500mm237°C/W

225mm2 2500mm22500mm238°C/W

100mm22500mm22500mm240°C/W

*Device is mounted on topside

Table 3. Measured Thermal Resistance for MSE Package

COPPER AREA

BOARD AREA

THERMAL RESISTANCE

(JUNCTION-TO-AMBIENT)TOPSIDE* BACKSIDE

2500mm22500mm22500mm235°C/W

1000mm22500mm22500mm237°C/W

225mm2 2500mm22500mm238°C/W

100mm22500mm22500mm240°C/W

*Device is mounted on topside.

LT3022/LT3022-1.2

LT3022-1.5/LT3022-1.8

3022fb

APPLICATIONS INFORMATION

Calculating Junction Temperature

Example: Given an output voltage of 1.5V, an input voltage

range of 1.7V to 1.9V, an output load current range of 1mA

to 1A and a maximum ambient temperature of 85°C, what

is the maximum junction temperature for an application

using the DHC package?

The power dissipated by the device equals:

ILOAD(MAX) • (VIN(MAX) – VOUT) + IGND • (VIN(MAX))

where:

ILOAD(MAX) = 1A

VIN(MAX) = 1.9V

IGND at (ILOAD = 1A, VIN = 1.9V) = 18mA

so:

P = 1A • (1.9V – 1.5V) + 18mA • (1.9V) = 0.434W

The thermal resistance is about 38°C/W depending on

the copper area. So the junction temperature rise above

ambient is approximately equal to:

0.434W • (38°C/W) = 16.5°C

The maximum junction temperature equals the maximum

junction temperature rise above ambient plus the maximum

ambient temperature or:

TJMAX = 85°C + 16.5°C = 101.5°C

Protection Features

The LT3022 incorporates several protection features

that make it ideal for use in battery-powered circuits. In

addition to the normal protection features associated with

monolithic regulators, such as current limiting and thermal

limiting, the device also protects against reverse-input

voltages, reverse-output voltages and reverse output-to-

input voltages.

Current limit protection and thermal overload protection

protect the device against current overload conditions at its

output. For normal operation, do not exceed 125°C junction

temperature. The typical thermal shutdown temperature

is 165°C and the thermal shutdown circuit incorporates

about 7°C of hysteresis.

The IN pins withstand reverse voltages of 10V. The LT3022

limits current ﬂow to less than 1µA and no negative voltage

appears at OUT . The device protects both itself and the

load against batteries that are plugged in backwards.

The LT3022 incurs no damage if OUT is pulled below

ground. If IN is left open-circuited or grounded, OUT can

be pulled below ground by 10V. No current ﬂows from

the pass transistor connected to OUT. However, current

ﬂows in (but is limited by) the resistor divider that sets the

output voltage. Current ﬂows from the bottom resistor in

the divider and from the ADJ pin’s internal clamp through

the top resistor in the divider to the external circuitry pulling

OUT below ground. If IN is powered by a voltage source,

OUT sources current equal to its current limit capability

and the LT3022 protects itself by thermal limiting. In this

case, grounding SHDN turns off the LT3022 and stops

OUT from sourcing current.

The LT3022 incurs no damage if the ADJ pin is pulled

above or below ground by 10V. If IN is left open-circuited

or grounded and ADJ is pulled above ground, ADJ acts

like a 25k resistor in series with two diodes. ADJ acts like

a 25k resistor if pulled below ground. If IN is powered by a

voltage source and ADJ is pulled below its reference voltage,

the LT3022 attempts to source its current limit capability

at OUT. The output voltage increases to VIN – VDROPOUT

with VDROPOUT set by whatever load current the LT3022

supports. This condition can potentially damage external

circuitry powered by the LT3022 if the output voltage

increases to an unregulated high voltage. If IN is powered

by a voltage source and ADJ is pulled above its reference

voltage, two situations can occur. If ADJ is pulled slightly

above its reference voltage, the LT3022 turns off the pass

transistor, no output current is sourced and the output

voltage decreases to either the voltage at ADJ or less. If

ADJ is pulled above its no-load recovery threshold, the

no-load recovery circuitry turns on and attempts to sink

current. OUT is actively pulled low and the output voltage

clamps at a Schottky diode above ground. Please note that

the behavior described above applies to the LT3022 only. If

a resistor divider is connected under the same conditions,

there will be additional V/R current.

LT3022/LT3022-1.2

LT3022-1.5/LT3022-1.8

3022fb

APPLICATIONS INFORMATION

In circuits where a backup battery is required, several

different input/output conditions can occur. The output

voltage may be held up while the input is either pulled to

ground, pulled to some intermediate voltage or is left open

circuit. In the case where the input is grounded, there is

less than 1µA of reverse output current. If the LT3022 IN

pin is forced below the OUT pin or the OUT pin is pulled

above the IN pin, input current drops to less than 10µA

typically. This occurs if the LT3022 input is connected to

a discharged (low voltage) battery and either a backup

battery or a second regulator circuit holds up the output.

The state of the SHDN pin has no effect on the reverse

output current if OUT is pulled above IN.

Input Capacitance and Stability

The LT3022 design is stable with a minimum of 10µF

capacitor placed at the IN pin. Very low ESR ceramic

capacitors may be used. However, in cases where long

wires connect the power supply to the LT3022’s input and

ground, use of low value input capacitors combined with

an output load current of greater than 20mA may result

in instability. The resonant LC tank circuit formed by the

wire inductance and the input capacitor is the cause and

not a result of LT3022 instability.

The self-inductance, or isolated inductance, of a wire

is directly proportional to its length. However, the wire

diameter has less inﬂuence on its self inductance. For

example, the self-inductance of a 2-AWG isolated wire

with a diameter of 0.26" is about half the inductance of a

30-AWG wire with a diameter of 0.01". One foot of 30-AWG

wire has 465nH of self-inductance.

Several methods exist to reduce a wire’s self-inductance.

One method divides the current ﬂowing towards the

LT3022 between two parallel conductors. In this case,

placing the wires further apart reduces the inductance;

up to a 50% reduction when placed only a few inches

apart. Splitting the wires connects two equal inductors

in parallel. However, when placed in close proximity to

each other, mutual inductance adds to the overall self

inductance of the wires. The most effective technique to

reducing overall inductance is to place the forward and

return current conductors (the input wire and the ground

wire) in close proximity. Two 30-AWG wires separated by

0.02" reduce the overall self-inductance to about one-ﬁfth

of a single wire.

If a battery, mounted in close proximity, powers the LT3022,

a 10µF input capacitor sufﬁces for stability. However,

if a distantly located supply powers the LT3022, use a

larger value input capacitor. Use a rough guideline of 1µF

(in addition to the 10µF minimum) per 8 inches of wire

length. The minimum input capacitance needed to stabilize

the application also varies with power supply output

impedance variations. Placing additional capacitance on

the LT3022’s output also helps. However, this requires

an order of magnitude more capacitance in comparison

with additional LT3022 input bypassing. Series resistance

between the supply and the LT3022 input also helps stabilize

the application; as little as 0.1Ω to 0.5Ω sufﬁces. This

impedance dampens the LC tank circuit at the expense of

dropout voltage. A better alternative is to use higher ESR

tantalum or electrolytic capacitors at the LT3022 input in

place of ceramic capacitors.

LT3022/LT3022-1.2

LT3022-1.5/LT3022-1.8

3022fb

PACKAGE DESCRIPTION

DHC Package

16-Lead Plastic DFN (5mm × 3mm)

(Reference LTC DWG # 05-08-1706)

3.00 ±0.10

(2 SIDES)

5.00 ±0.10

(2 SIDES)

NOTE:

1. DRAWING PROPOSED TO BE MADE VARIATION OF VERSION (WJED-1) IN JEDEC

PACKAGE OUTLINE MO-229

2. DRAWING NOT TO SCALE

3. ALL DIMENSIONS ARE IN MILLIMETERS

4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE

MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE

5. EXPOSED PAD SHALL BE SOLDER PLATED

6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE

TOP AND BOTTOM OF PACKAGE

0.40 ± 0.10

BOTTOM VIEW—EXPOSED PAD

1.65 ± 0.10

(2 SIDES)

0.75 ±0.05

R = 0.115

TYP

R = 0.20

TYP

4.40 ±0.10

(2 SIDES)

169

PIN 1

TOP MARK

(SEE NOTE 6)

0.200 REF

0.00 – 0.05

(DHC16) DFN 1103

0.25 ± 0.05

PIN 1

NOTCH

0.50 BSC

4.40 ±0.05

(2 SIDES)

RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS

1.65 ±0.05

(2 SIDES)2.20 ±0.05

0.50 BSC

0.65 ±0.05

3.50 ±0.05

PACKAGE

OUTLINE

0.25 ± 0.05

LT3022/LT3022-1.2

LT3022-1.5/LT3022-1.8

3022fb

PACKAGE DESCRIPTION

MSOP (MSE16) 0911 REV E

0.53 ± 0.152

(.021 ± .006)

SEATING

PLANE

0.18

(.007)

1.10

(.043)

MAX

0.17 –0.27

(.007 – .011)

TYP

0.86

(.034)

REF

0.50

(.0197)

BSC

16151413121110

12345678

NOTE:

1. DIMENSIONS IN MILLIMETER/(INCH)

2. DRAWING NOT TO SCALE

3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.

MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE

4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.

INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE

5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX

6. EXPOSED PAD DIMENSION DOES INCLUDE MOLD FLASH. MOLD FLASH ON E-PAD SHALL

NOT EXCEED 0.254mm (.010") PER SIDE.

0.254

(.010) 0° – 6° TYP

DETAIL “A”

GAUGE PLANE

5.23

(.206)

MIN

3.20 – 3.45

(.126 – .136)

0.889 ± 0.127

(.035 ± .005)

RECOMMENDED SOLDER PAD LAYOUT

0.305 ± 0.038

(.0120 ± .0015)

TYP

0.50

(.0197)

BSC

BOTTOM VIEW OF

EXPOSED PAD OPTION

2.845 ± 0.102

(.112 ± .004)

2.845 ± 0.102

(.112 ± .004)

4.039 ± 0.102

(.159 ± .004)

(NOTE 3)

1.651 ± 0.102

(.065 ± .004)

1.651 ± 0.102

(.065 ± .004)

0.1016 ± 0.0508

(.004 ± .002)

3.00 ± 0.102

(.118 ± .004)

(NOTE 4)

0.280 ± 0.076

(.011 ± .003)

REF

4.90 ± 0.152

(.193 ± .006)

DETAIL “B”

CORNER TAIL IS PART OF

THE LEADFRAME FEATURE.

FOR REFERENCE ONLY

NO MEASUREMENT PURPOSE

0.12 REF

0.35

REF

MSE Package

16-Lead Plastic MSOP, Exposed Die Pad

(Reference LTC DWG # 05-08-1667 Rev E)

LT3022/LT3022-1.2

LT3022-1.5/LT3022-1.8

3022fb

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-

tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

REVISION HISTORY

REV DATE DESCRIPTION PAGE NUMBER

A 9/10 Added -1.2, -1.5, and -1.8 ﬁxed voltage options 1 to 6, 10, 20

B 02/12 Revised Max value for Input Reverse Leakage Current

Updated the 16-lead MSE package

LT3022/LT3022-1.2

LT3022-1.5/LT3022-1.8

3022fb

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com

LINEAR TECHNOLOGY CORPORATION 2010

LT 0212 REV B • PRINTED IN USA

RELATED PARTS

PART NUMBER DESCRIPTION COMMENTS

LT3020 100mA, Low Voltage VLDO Linear Regulator VIN: 0.9V to 10V, VOUT

: 0.2V to 9.5V, VDO = 0.15V, IQ = 120µA,

Noise: <250µVRMS, Stable with 2.2µF Ceramic Capacitors, DFN-8,

MS8 Packages

LT3021 500mA, Low Voltage, VLDO Linear Regulator VIN: 0.9V to 10V, Dropout Voltage: 160mV Typical, Adjustable Output

(VREF = VOUT(MIN) = 200mV), Fixed Output Voltages: 1.2V, 1.5V, 1.8V, Stable

with Low ESR, Ceramic Output Capacitors, 16-Pin DFN (5mm × 5mm) and

8-Lead SO Packages

LTC

3025 300mA Micropower VLDO Linear Regulator VIN = 0.9V to 5.5V, Dropout Voltage: 45mV, Low Noise 80µVRMS,

Low IQ: 54µA, 2mm × 2mm 6-Lead DFN Package

LTC3025-1/LTC3025-2/

LTC3025-3/LTC3025-4

500mA Micropower VLDO Linear Regulator in

2mm × 2mm DFN

VIN = 0.9V to 5.5V, Dropout Voltage: 75mV, Low Noise 80µVRMS,

Low IQ: 54µA, Fixed Output: 1.2V (LTC3025-2), 1.5V (LTC3025-3),

1.8V (LTC3025-4); Adjustable Output Range: 0.4V to 3.6V (LTC3025-1),

2mm × 2mm 6-Lead DFN Package

LTC3026 1.5A, Low Input Voltage VLDO Linear Regulator VIN: 1.14V to 3.5V (Boost Enabled), 1.14V to 5.5V (with External 5V),

VDO = 0.1V, IQ = 950µA, Stable with 10µF Ceramic Capacitors, 10-Lead

eMSOP and DFN-10 Packages

LT3029 Dual 500mA/500mA, Low Dropout, Low Noise,

Micropower Linear Regulator

Output Current: 500mA per Channel, Low Dropout Voltage: 300mV Low

Noise: 20µVRMS (10Hz to 100kHz), Low Quiescent Current: 55µA per Channel,

Wide Input Voltage Range: 1.8V to 20V (Common or Independent Input

Supply), Adjustable Output: 1.215V Reference, Very Low Quiescent Current

in Shutdown: <1µA per Channel Stable with 3.3µF Minimum Output Capacitor,

Stable with Ceramic, Tantalum or Aluminum Electrolytic Capacitors, Reverse-

Battery, and Reverse Output-to-Input Protection, Thermally Enhanced 16-Lead

eMSOP and 16-Lead (4mm × 3mm) DFN Packages

LTC3035 300mA VLDO Linear Regulator with Charge

Pump Bias Generator

VIN = 1.7V to 5.5V, VOUT : 0.4V to 3.6V, Dropout Voltage: 45mV, IQ: 100µA,

3mm × 2mm DFN-8

LT3080/LT3080-1 1.1A, Parallelable, Low Noise, Low Dropout

Linear Regulator

300mV Dropout Voltage (2-Supply Operation), Low Noise: 40µVRMS,

VIN: 1.2V to 36V, VOUT

: 0V to 35.7V, Current-Based Reference with 1-Resistor

VOUT Set; Directly Parallelable (No Op Amp Required), Stable with Ceramic

Capacitors, TO-220, SOT-223, eMSOP-8 and 3mm × 3mm DFN-8 Packages;

LT3080-1 Has Integrated Internal Ballast Resistor

LT3085 500mA, Parallelable, Low Noise, Low Dropout

Linear Regulator

275mV Dropout Voltage (2-Supply Operation), Low Noise: 40µVRMS,

VIN: 1.2V to 36V, VOUT

: 0V to 35.7V, Current-Based Reference with 1-Resistor

VOUT Set; Directly Parallelable (No Op Amp Required), Stable with Ceramic

Capacitors, eMSOP-8 and 2mm × 3mm DFN-6 packages

TYPICAL APPLICATION

1.5V to 1.2V, 1A VLDO Regulator

10µF

VIN

1.5V

VOUT

1.2V

LT3022-1.2

SHDN

OUT

SENSE

GND

10µF

RLD

1.2K*

3022 TA02

*RLD: OPTIONAL (TO SATISFY 1mA MINIMUM LOAD CURRENT REQUIREMENT)