LT3640 查看數據表（PDF） - Linear Technology

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LT3640

Dual Monolithic Buck Regulator with Power-On Reset and Watchdog Timer

Linear Technology 

LT3640

Typical Application

VIN

4V TO 35V

4.7µF

2MHz 3.3V/0.8A and 0.8V/1.2A Buck Regulators

0.22µF

EN/UVLO

VIN

SYNC

WDE

SW BST SW1

DA

FB1

EN2

3.3µH

80.6k

49.9k

PGOOD

LT3640

RST1

RST2

WDO

WDI

CWDT CPOR

RT GND

1.5nF

1.5nF

32.4k

VIN2

SW2

FB2

SS2 SS1

1nF

1nF

0.47µH

16.5k

49.9k

3640 TA05

VOUT1

3.3V/0.8A

22µF

VOUT2

0.8V/1.2A

22µF

Related Parts

PART NUMBER DESCRIPTION

LT3689

36V, 60V Transient Protection, 800mA, 2.2MHz High Efficiency

MicroPower Step-Down DC/DC Converter with POR Reset and

Watchdog Timer

LT3686

37V, 55VMAX, 1.2A, 2.5MHz High Efficiency Step-Down DC/DC

Converter

LT3682

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

Step-Down DC/DC Converter

LT3971

38V, 1.2A (IOUT), 2MHz, High Efficiency Step-Down DC/DC

Converter with Only 2.8µA of Quiescent Current

LT3991

55V, 1.2A (IOUT), 2MHz, High Efficiency Step-Down DC/DC

Converter with Only 2.8µA of Quiescent Current

COMMENTS

VIN: 3.6V to 36V, Transient to 60V, VOUT(MIN) = 0.8V, IQ = 75µA,

ISD < 1µA, 3mm × 3mm QFN-16 Package

VIN: 3.6V to 37V, Transient to 55V, VOUT(MIN) = 1.21V, IQ = 1.1mA,

ISD < 1µA, 3mm × 3mm DFN-10 Package

VIN: 3.6V to 36V, VOUT(MIN) = 0.8V, IQ = 75µA, ISD < 1µA, 3mm × 3mm

DFN-12 Package

VIN: 4.2V to 38V, VOUT(MIN) = 1.2V, IQ = 2.8µA, ISD < 1µA, 3mm × 3mm

DFN-10, MSOP-10E Packages

VIN: 4.2V to 55V, VOUT(MIN) = 1.2V, IQ = 2.8µA, ISD < 1µA, 3mm × 3mm

DFN-10, MSOP-10E Packages

24 Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

3640f

LT 0510 • PRINTED IN USA

 LINEAR TECHNOLOGY CORPORATION 2010

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