RT7257C 데이터 시트보기 (PDF) - Richtek Technology

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RT7257C

3A, 18V, 340kHz Synchronous Step-Down Converter

Richtek Technology 

Function Block Diagram

RT7257C

VIN

Internal

Regulator

Oscillator

Shutdown

Comparator VA VCC

1.2V +

Foldback

Control

-

0.4V +

Lockout

5kΩ

Comparator

EN

-

-

UV

Comparator

1.8V +

VCC

6µA

0.8V +

SS

-+EA

Current Sense

Slope Comp Amplifier

+

-

VA

RSENSE

SQ

+

-

RQ

Current

Comparator

110mΩ

90mΩ

BOOT

SW

GND

FB

COMP

Copyright ©2012 Richtek Technology Corporation. All rights reserved.

DS7257C-02 September 2012

is a registered trademark of Richtek Technology Corporation.

www.richtek.com

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