R1234D321B 데이터 시트보기 (PDF) - RICOH Co.,Ltd.

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R1234D321B

PWM/VFM Step-Down DC/DC CONVERTER with Synchronous Rectifier

RICOH Co.,Ltd. 

R1234D

BLOCK DIAGRAM

R1234Dxx1A/B

VDD

MODE

3

6

“L” PWM “H” VFM

1 VIN

Lx 8

PWM/VFM

CONTROL

OUTPUT

CONTROL

Current Protection

OSC

Phase Comp.

5 VOUT

Vref

CE

UVLO

Soft Start

Chip Enable

“H” Active

4 CE

2

PGND

7

AGND

1 VIN

Lx 8

R1234Dxx1C/D

VDD

MODE

3

6

“L” PWM “H” VFM

PWM/VFM

CONTROL

OUTPUT

CONTROL

Current Limit

OSC

Phase Comp.

5 VFB

UVLO

Vref

Chip Enable

Soft Start

“H” Active

4 CE

2

PGND

7

AGND

2

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