LT3973IMSE-3.3-TRPBF 查看數據表（PDF） - Linear Technology

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LT3973IMSE-3.3-TRPBF

42V, 750mA Step-Down Regulator with 2.5µA Quiescent Current and Integrated Diodes

Linear Technology 

LT3973/LT3973-3.3/LT3973-5

TYPICAL APPLICATION

1.21V Step-Down Converter

VIN

4.2V TO 25V

C1

4.7µF

OFF ON

340k

VIN BOOST

LT3973

EN/UVLO SW

BD

FB

PG

OUT

RT

GND

f = 400kHz

C3

0.47µF

L1

10µH

VOUT

1.21V

750mA

C2

47µF

3973 TA10

RELATED PARTS

PART NUMBER

LT3970/LT3970-

3.3/LT3970-5

LT3990

LT3971

LT3991

LT3682

DESCRIPTION

40V, 350mA, 2.2MHz High Efficiency Micropower Step-Down DC/DC

Converter with IQ = 2.5µA

62V, 350mA, 2.2MHz High Efficiency Micropower Step-Down DC/DC

Converter with IQ = 2.5µA

38V, 1.2A, 2.2MHz High Efficiency Micropower Step-Down DC/DC

Converter with IQ = 2.8µA

55V, 1.2A, 2.2MHz High Efficiency Micropower Step-Down DC/DC

Converter with IQ = 2.8µA

36V, 60VMAX, 1A, 2.2MHz High Efficiency Micropower Step-Down

DC/DC Converter

COMMENTS

VIN = 4.2V to 40V, VOUT(MIN) = 1.21V, IQ = 2.5µA, ISD < 1µA,

3mm × 2mm DFN-10, MSOP-10

VIN = 4.2V to 62V, VOUT(MIN) = 1.21V, IQ = 2.5µA, ISD < 1µA,

3mm × 3mm DFN-16, MSOP-16E

VIN = 4.3V to 38V, VOUT(MIN) = 1.2V, IQ = 2.8µA, ISD < 1µA,

3mm × 3mm DFN-10, MSOPE-10

VIN = 4.3V to 55V, VOUT(MIN) = 1.2V, IQ = 2.8µA, ISD < 1µA,

3mm × 3mm DFN-10, MSOPE-10

VIN = 3.6V to 36V, VOUT(MIN) = 0.8V, IQ = 75µA, ISD < 1µA,

3mm × 3mm DFN-12

24 Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 950F3o5r -m7o4r1e7information www.linear.com/LT3973

(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com/LT3973

3973fb

LT 0315 REV B • PRINTED IN USA

 LINEAR TECHNOLOGY CORPORATION 2011

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