LT3640I 데이터 시트보기 (PDF) - Linear Technology

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LT3640I

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

Linear Technology 

Block Diagram

2µA

EN/

UVLO 100k

5.5V

+

ENABLE

–A4

LT3640

CIN

VIN

–

+A3

RQ

S

DRIVER

BST

Q1

SW

DBST

CBST

SS1

R2

VOUT1

FB1

R1

VREF

1.265V

2µA

+ gm1

+–

VC1

3

RAMP

GENERATOR

OSCILLATOR

+

–

–+

A8

3

A1

A2

A5

2µA

SS2

R4

VOUT2

FB2

R3

PGOOD

+ gm2

+–

+

VC2 –A7

+

50mV –

–+

A9

VREF

600mV

S

RQ

LOGIC

CIRCUIT

A6

2µA

CPOR

POR TIMER

RST1 RST2

2µA

WATCHDOG

TIMER

WDE WDI WDO

SW1

DA

L1

D1

VOUT1

COUT1

RT

SYNC

SW2

VIN2

CIN2

L2 VOUT2

COUT2

EN2

CWDT

3640 BD

3640f



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