RT8204A 데이터 시트보기 (PDF) - Richtek Technology

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RT8204A

Single Synchronous Buck with LDO Controller

Richtek Technology 

RT8204A

Function Block Diagram

PWM Controller

VOUT

TON

SS

(Internal)

TRIG

On-time

Compute

1-SHOT

-+

GM

+-

- Comp

+

FB

VDD

GND

0.75V VREF

115% VREF

70% VREF

Latch

+

OV S1

Q

-

-

Latch

UV S1 Q

+

-

90% VREF +

SS Timer

Thermal

Shutdown

EN/DEM

R

SQ

Min. TOFF

Q

TRIG

1-SHOT

Diode

Emulation

DRV

DRV

20µA

+

-

BOOT

UGATE

PHASE

VDDP

LGATE

PGND

OC

PGOOD

LDO Controller

LEN

LFB

0.75V VREF

SS ramp

90% VREF

50% VREF

SS

+

X1

-

-

+

-

+

LDRV

LPGOOD

www.richtek.com

4

DS8204A-05 April 2011

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