LT1945 datasheet(8/8 Pages) LINER

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LT1945

1945f

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

©LINEAR TECHNOLOGY CORPORATION 2001

LT/TP 0802 2K • PRINTED IN USA

RELATED PARTS

PART NUMBER

DESCRIPTION

COMMENTS

LT1613

550mA ISW, 1.4MHz, High Efficiency Step-Up DC/DC Converter VIN = 0.9V to 10V, VOUT = 34V, IQ = 3mA, ISD = <1µA,

ThinSOT Package

LT1615/LT1615-1

300mA ISW, Constant Off-Time, High Efficiency

VIN = 1.2V to 15V, VOUT = 34V, IQ = 20µA, ISD = <1µA,

Step-Up DC/DC Converter

ThinSOT Package

LT1940

Dual Output 1.4A (IOUT), Constant 1.1MHz, High Efficiency

VIN = 3V to 25V, VOUT = 1.2V, IQ = 2.5mA, ISD = <1µA,

Step-Down DC/DC Converter

TSSOP-16E Package

LT1944

Dual Output 350mA ISW, Constant Off-Time, High Efficiency

VIN = 1.2V to 15V, VOUT = 34V, IQ = 20µA, ISD = <1µA, MS Package

Step-Up DC/DC Converter

LT1944-1

Dual Output 150mA ISW, Constant Off-Time, High Efficiency

VIN = 1.2V to 15V, VOUT = 34V, IQ = 20µA, ISD = <1µA, MS Package

Step-Up DC/DC Converter

LT1949/LT1949-1

550mA ISW, 600kHz/1.1MHz, High Efficiency

VIN = 1.5V to 12V, VOUT = 28V, IQ = 4.5mA, ISD = <25µA,

Step-Up DC/DC Converter

S8, MS8 Packages

LTC3400/LTC3400B 600mA ISW, 1.2MHz, Synchronous Step-Up DC/DC Converter

VIN = 0.85V to 5V, VOUT = 5V, IQ = 19µA/300µA, ISD = <1µA,

ThinSOT Package

LTC3401

1A ISW, 3MHz, Synchronous Step-Up DC/DC Converter

VIN = 0.5V to 5V, VOUT = 6V, IQ = 38µA, ISD = <1µA, MS Package

LTC3402

2A ISW, 3MHz, Synchronous Step-Up DC/DC Converter

VIN = 0.5V to 5V, VOUT = 6V, IQ = 38µA, ISD = <1µA, MS Package

LTC3423

1A ISW, 3MHz, Low VOUT, Synchronous Step-Up

VIN = 0.5V to 5V, VOUT = 6V, IQ = 38µA, ISD = <1µA, MS Package

DC/DC Converter

LTC3424

2A ISW, 3MHz, Low VOUT, Synchronous Step-Up

VIN = 0.5V to 5V, VOUT = 6V, IQ = 38µA, ISD = <1µA, MS Package

DC/DC Converter

Dual Output (

±32V) Converter

VIN

SW1

FB2

LT1945

µH

SHDN2

24.9k

604k

µF

–32V

5mA

VIN

2.7V

TO 5V

1945 TA02

GND

PGND

810

SW2

4.7pF

4.7

µF

NFB1

SHDN1

µH

80.6k

µF

100pF

C1: TAIYO YUDEN JMK212BJ475

C2, C3: TAIYO YUDEN GMK316BJ105

C4: TAIYO YUDEN UMK212BJ104

D1, D2, D3: ZETEX ZHCS400

L1, L2: MURATA LQH3C100

32V

5mA

0.1

µF

(408)573-4150

(631)543-7100

(814)237-1431

TYPICAL APPLICATIO

LOAD CURRENT (mA)

0.1

110

1945 TA02a

+32V OUTPUT

–32V OUTPUT

Efficiency at VIN = 3.6V

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