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LT3474/LT3474-1

3474fd

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

LT 1008 REV D • PRINTED IN USA

RELATED PARTS

TYPICAL APPLICATION

PART NUMBER

DESCRIPTION

COMMENTS

LT1618

Constant Current, 1.4MHz, 1.5A Boost Converter

VIN: 1.6V to 18V, VOUT(MAX) = 36V, IQ = 1.8mA, ISD = <1μA,

MS10 Package

LT1766

60V, 1.2A (IOUT), 200kHz, High Efﬁciency Step-Down DC/DC Converter

VIN: 5.5V to 60V, VOUT(MAX) = 1.20V, IQ = 2.5mA, ISD = 25μA,

TSSOP16/E Packages

LT1956

60V, 1.2A (IOUT), 500kHz, High Efﬁciency Step-Down DC/DC Converter

VIN: 5.5V to 60V, VOUT(MAX) = 1.20V, IQ = 2.5mA, ISD = 25μA,

TSSOP16/E Packages

LT1961

1.5A (ISW), 1.25MHz, High Efﬁciency Step-Up DC/DC Converter

VIN: 3V to 25V, VOUT(MAX) = 35V, IQ = 0.9mA, ISD = 6μA,

MS8E Package

LT1976/LT1977

60V, 1.2A (IOUT), 200kHz/500kHz, High Efﬁciency Step-Down

DC/DC Converters with BurstMode® Operation

VIN: 3.3V to 60V, VOUT(MAX) = 1.20V, IQ = 100μA, ISD = <1μA,

TSSOP16E Package

LT3430/LT3431

60V, 2.5A (IOUT), 200kHz, High Efﬁciency Step-Down DC/DC Converters VIN: 5.5V to 60V, VOUT(MAX) = 1.20V, IQ = 2.5μA,

ISD = <25μA, TSSOP16/E Packages

LT3433

60V, 400mA (IOUT), 200kHz, High Efﬁciency Step-Up/Step-Down

DC/DC Converters with Burst Mode Operation

VIN: 4V to 60V, VOUT: 3.3V to 20V, IQ = 100μA,

ISD = <1μA, TSSOP16E Package

LT3434/LT3435

60V, 2.5A (IOUT), 200kHz/500kHz, High Efﬁciency Step-Down

DC/DC Converters with Burst Mode Operation

VIN: 3.3V to 60V, VOUT(MAX) = 1.20V, IQ = 100μA, ISD = <1μA,

TSSOP16E Package

LTC3453

1MHz, 800mA Synchronous Buck-Boost High Power LED Driver

VIN: 2.7V to 5.5V, VOUT(MAX) = 5.5V, IQ = 2.5mA, ISD = <6μA,

QFN Package

LT3467/LT3467A 1.1A (ISW), 1.3MHz/2.1MHz, High Efﬁciency Step-Up DC/DC Converters

with Integrated Soft-Start

VIN: 2.4V to 16V, VOUT(MAX) = 40V, IQ = 1.2mA, ISD = <1μA,

ThinSOT™ Package

LT3477

3A, 42V, 3MHz Step-Up Regulator with Dual Rail to Rail Current Sense VIN: 2.5V to 2.5V, VOUT(MAX) = 40V, IQ = 5mA, ISD = <1μA,

QFN, TSSOP16E Packages

LT3479

3A, Full Featured DC/DC Converter with Soft-Start and Inrush

Current Protection

VIN: 2.5V to 24V, VOUT(MAX) = 40V, IQ = 6.5mA, ISD = <1μA,

DFN and TSSOP Packages

Burst Mode is a registered trademark of Linear Technology Corporation.

ThinSOT is a trademark of Linear Technology Corporation.

VIN

BIAS

OUT

LED

PWM

LT3474-1

0.1μF

VIN

21V TO

36V

2.2μF

25V

10k

100k

1A LED

CURRENT

fSW = 500kHz

12V TO 18V

LED VOLTAGE

0.22μF

16V

47μH

3474 TA02a

80.6k

SHDN

REF

BOOST

VADJ

GND

2.2μF

50V

D1: MBRM 140

D2: 7.5V Zener Diode

D3: 22V Zener Diode

Q1: MMBT3904

C1 TO C3: X5R OR X7R

Step-Down 1A LED Driver with Four Series Connected LED Output

MBR0540 Datasheet(PDF) 20 Page - Linear Technology

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