US3004 데이터 시트보기 (PDF) - Unisem

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US3004

5 BIT PROGRAMMABLE SYNCHRONOUS BUCK CONTROLLER IC WITH DUAL LDO CONTROLLER

Unisem 

BLOCK DIAGRAM

US3004/US3005

V12

V5

D0

D1

D2

D3

D4

Vfb2

Lin2

Enable

UVLO

Vset

Enable

5Bit

DAC,

Ctrl

Logic

Lin1

Vfb1

V12

Vset

Enable

PWM

+

Control

V12

Slope

Comp

Osc

Soft

Start &

Fault

Logic

Enable

Over

Current

200uA

1.1Vset

1.5V

0.9Vset

Vfb3

HDrv

LDrv

CS-

CS+

Ct / En

SS

PGd

Gnd

3004blk2-1.3

Figure 1 - Simplified block diagram of the US3004.

Rev. 1.2

12/8/00

4-5

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