SC1189(2004) 데이터 시트보기 (PDF) - Semtech Corporation

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SC1189
(Rev.:2004)

Programmable Synchronous DC/DC Converter, Dual LDO Controller

Semtech Corporation 

POWER MANAGEMENT

Block Diagram

SC1189

VID3

VID2

VID1

VID0

VID25MV

VOSENSE

PWRGD

LDOEN

LDOS1

GATE1

VCC

CS- CS+

EN

REF

ERROR

AMP

70mV

CURRENT

LIMIT

+

-

D/A

+

-

-

+

+

-

OPEN

COLLECTORS

+

-

OSCILLATOR

AGND

R

Q

S

2.5V FET

CONTROLLER

REF

1.25V FET

CONTROLLER

BSTH

LEVEL SHIFT AND

HIGH SIDE DRIVE

DH

PGNDH

SHOOT-THRU

CONTROL

SYNCHRONOUS

MOSFET DRIVE

BSTL

DL

PGNDL

LDOV

GATE2 LDOS2

AGND

 2004 Semtech Corp.

5

www.semtech.com

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