RT9202B 데이터 시트보기 (PDF) - Richtek Technology

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RT9202B

Single Synchronous Buck PWM DC-DC Controller

Richtek Technology 

RT9202B

COUT

1000uF

L

5uH

CVCC

1uF

GND

VCC

BOOT

RT9202B

CBOOT

0.1uF

MU

D

G

S

ML

D

CIN1 CIN2

1uF 470uF

G

S

GND Return

Layout Placement

Layout Notes

1. Put CIN1 & CIN2 to be near the MU drain and ML source nodes.

2. Put RT9202B to be near the COUT

3. Put CBOOT as close as to BOOT pin

4. Put CVCC as close as to VCC pin

Function Block Diagram

VCC

FB

GND

Bias

0.8

Reference

Power on

Reset

Soft Start

1.1V

-

+OVP

0.8V

+

Error -

-

0.5V

UVP

+

Error

Amplifier

+

PWM

-

300kHz

Oscillator

6.0V

Regulation

BOOT

20uA

OC+

-

OCSET

UGATE

Control

Logic

VCC

PHASE

LGATE

DS9202B-03 March 2007

www.richtek.com

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