LTC3631 Datasheet, PDF(22/22 Page) Linear Technology – High Effi ciency, High Voltage 100mA Synchronous Step-Down Converter

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LTC3631 Datasheet, PDF (22/22 Pages) Linear Technology – High Effi ciency, High Voltage 100mA Synchronous Step-Down Converter

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LTC3631

TYPICAL APPLICATION

5V, 100mA Regulator for Automotive Applications

VBATT

4.5V TO 45V

AND SURVIVES

TRANSIENTS

UP TO 60V

CIN

2.2Î¼F

VIN

LTC3631

RUN

VFB

ISET

HYST

GND

100Î¼H

470k

88.7k

3631 TA06a

COUT

10Î¼F

VOUT*

100mA

CIN: TDK C3225X7R2A225M

COUT: KEMET C1210C106K4RAC

L1: COILTRONICS DRA73-101-R

*VOUT = VBATT FOR VBATT < 5V

RELATED PARTS

PART NUMBER DESCRIPTION

COMMENTS

LTC3632

50V, 20mA Synchronous Micropower Step-Down DC/DC Converter

LTC3642

45V, 50mA Synchronous Micropower Step-Down DC/DC Converter

LTC1474

18V, 250mA (IOUT), High Efï¬ciency Step-Down DC/DC Converter

LT1934/LT1934-1 36V, 250mA (IOUT), Micropower Step-Down DC/DC Converter with

Burst Mode Operation

VIN: 4.5V to 50V (60VMAX), VOUT(MIN) = 0.8V, IQ = 12Î¼A,

ISD = 3Î¼A, 3mm Ã 3mm DFN, MS8E

VIN: 4.5V to 45V (60VMAX), VOUT(MIN) = 0.8V, IQ = 12Î¼A,

ISD = 3Î¼A, 3mm Ã 3mm DFN8, MS8E

VIN: 3V to 18V, VOUT(MIN) = 1.2V, IQ = 10Î¼A, ISD = 6Î¼A, MS8E

VIN: 3.2V to 34V, VOUT(MIN) = 1.25V, IQ = 12Î¼A, ISD < 1Î¼A,

ThinSOTâ¢ Package

LT1939

25V, 2A, 2.5MHz High Efï¬ciency DC/DC Converter and LDO

Controller

VIN: 3.6V to 25V, VOUT(MIN) = 0.8V, IQ = 2.5mA, ISD < 10Î¼A,

3mm Ã 3mm DFN10

LT1976/LT1977 60V, 1.2A (IOUT), 200kHz/500kHz, High Efï¬ciency Step-Down DC/DC VIN: 3.3V to 60V, VOUT(MIN) = 1.2V, IQ = 100Î¼A, ISD < 1Î¼A,

Converter with Burst Mode Operation

TSSOP16E

LT3437

60V, 400mA (IOUT), Micropower Step-Down DC/DC Converter with VIN: 3.3V to 60V, VOUT(MIN) = 1.25V, IQ = 100Î¼A, ISD < 1Î¼A,

Burst Mode Operation

3mm Ã 3mm DFN10, TSSOP16E

LT3470

40V, 250mA (IOUT), High Efï¬ciency Step-Down DC/DC Converter

with Burst Mode Operation

VIN: 4V to 40V, VOUT(MIN) = 1.2V, IQ = 26Î¼A, ISD < 1Î¼A,

2mm Ã 3mm DFN8, ThinSOT

LT3685

36V with Transient Protection to 60V, 2A (IOUT), 2.4MHz, High

Efï¬ciency Step-Down DC/DC Converter

VIN: 3.6V to 38V, VOUT(MIN) = 0.78V, IQ = 70Î¼A, ISD < 1Î¼A,

3mm Ã 3mm DFN10, MSOP10E

22 Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

3631fb

LT 0510 REV B â¢ PRINTED IN USA