SC4620(2007) Просмотр технического описания (PDF) - Semtech Corporation

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Компоненты Описание

производитель

SC4620
(Rev.:2007)

Low Input Voltage, High Effciency, 2.5A Integrated FET Synchronous Step down DC/DC Regulator

Semtech Corporation 

POWER MANAGEMENT

Block Diagram

VCC

BANDGAP

BANDGAP

THERMAL

SHUTDOWN

UVLO

AGND

VREF

SS

FB

COMP

SYNC/EN

FFSB

SOFT

START

SD

OSC

CLOCK

ERROR

OPAMP

PWM

BLOCK

PWM

LOGIC

1.1VREF

0.9VREF

SC4620

ASYNCHRONOUS

START UP

0.5V +

-

SHOOT-

THRU

PROTECTION

TOP GATE

PVIN1

PVIN2

HIGH SIDE DRIVER

AND LOGIC

ISET

I = F(R_ISET)

OVER

CURRENT

PROTECT

BOTTOM

GATE

LOW SIDE DRIVER

AND LOGIC

PH1

PH2

PH3

PGND1

PGND2

PGOOD

 2007 Semtech Corp.

10

www.semtech.com

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