LTC3621/LTC3621-2

20

Rev. D

For more information www.analog.com



ANALOG DEVICES, INC. 2013-2021

03/21

www.analog.com

RELATED PARTS

TYPICAL APPLICATION

PART NUMBER DESCRIPTION

COMMENTS

LTC3646/

LTC3646-1

40V, 1A (IOUT), 3MHz Synchronous Step-Down

DC/DC Converter

95% Efficiency, VIN: 4V to 40V, VOUT(MIN) = 0.6V, IQ = 140µA, ISD < 8µA,

3mm × 4mm DFN-14, MSOP-16E Packages

LTC3600

1.5A, 15V, 4MHz Synchronous Rail-to-Rail Single

Resistor Step-Down Regulator

95% Efficiency, VIN: 4V to 15V, VOUT(MIN) = 0V, IQ = 700µA, ISD < 1µA,

3mm × 3mm DFN-12, MSOP-12E Packages

LTC3601

15V, 1.5A (IOUT) 4MHz Synchronous Step-Down

DC/DC Converter

95% Efficiency, VIN: 4.5V to 15V, VOUT(MIN) = 0.6V, IQ = 300µA, ISD < 1µA,

4mm × 4mm QFN-20, MSOP-16E Packages

LTC3603

15V, 2.5A (IOUT) 3MHz Synchronous Step-Down

DC/DC Converter

95% Efficiency, VIN: 4.5V to 15V, VOUT(MIN) = 0.6V, IQ = 75µA, ISD < 1µA,

4mm × 4mm QFN-20, MSOP-16E Packages

LTC3633/

LTC3633A

15V/20V, Dual 3A (IOUT) 4MHz Synchronous Step-Down

DC/DC Converter

95% Efficiency, VIN: 3.6V to 15V/20V, VOUT(MIN) = 0.6V, IQ = 500µA, ISD < 15µA,

4mm × 5mm QFN-28, TSSOP-28E Packages. A Version Up to 20VIN

LTC3605/

LTC3605A

15V/20V, 5A (IOUT) 4MHz Synchronous Step-Down

DC/DC Converter

95% Efficiency, VIN: 4V to 15V/20V, VOUT(MIN) = 0.6V, IQ = 2mA, ISD < 15µA,

4mm × 4mm QFN-24 Package. A Version Up to 20VIN

LTC3604

15V, 2.5A (IOUT) 4MHz Synchronous Step-Down

DC/DC Converter

95% Efficiency, VIN: 3.6V to 15V, VOUT(MIN) = 0.6V, IQ = 300µA, ISD < 14µA,

3mm × 3mm QFN-16, MSOP-16E Packages

LTC1877

600mA (IOUT) 550kHz Synchronous Step-Down

DC/DC Converter

VIN: 2.7V to 10V, VOUT(MIN) = 0.8V, IO = 10µA, ISD < 1µA, MSOP-8 Package

LT8610/LT8611 42V, 2.5A (IOUT) Synchronous Step-Down

DC/DC Converter

96% Efficiency, VIN: 3.4V to 42V, VOUT(MIN) = 0.97V, IQ = 2.5µA, ISD < 1µA,

MSOP-16E Package

R3

187k

CFB

22pF

C1

1µF

COUT

22µF

3621 TA02

L1

3.3µH

VOUT

5V

R4

25.5k

VIN

RUN

SW

VIN

12V

LTC3621-2

GND

FB

MODE/SYNC

INTVCC

CIN

10µF

3621 TA02

5VOUT with 400mA Burst Mode Operation, 2.25MHz

1.2VOUT, Forced Continuous Mode, 1MHz

1.2VOUT, Synchronized to 600kHz, Forced Continuous Mode

CFB

22pF

C1

1µF

COUT

22µF

1.2V

2.7V TO 17V

3621 TA03

L1

3.3µH

R5

604k

1V

VIN

RUN

SW

LTC3621

GND

FB

MODE/SYNC

INTVCC

CIN

10µF

R1

604k

V

VOUT

VIN

CFB

22pF

C1

1µF

COUT

22µF

1.2V

2.7V TO 17V

3621 TA04

L1

4.7µH

R5

604k

600kHz CLK

VIN

RUN

SW

LTC3621

GND

FB

MODE/SYNC

INTVCC

CIN

10µF

R1

604k

V

VOUT

VIN