150kHz 3A BUCK DC-DC CONVERTER

AP3003

Data Sheet

2

Feb. 2007 Rev. 1. 1

BCD Semiconductor Manufacturing Limited

Figure 2. Pin Configuration of AP3003 (Top View)

Pin Description

Pin Number

Pin Name

Function

Unregulated input voltage

2

OUTPUT

Switch driver output

3

GND

Ground

4

FEEDBACK

Feedback Pin. For fixed version, connect it to system output. For adjustable version,

connect it with an external resistor and capacitor feedback network to program the sys-

tem output voltage

5ON/OFF

The TTL logic compatible input to control the regulator on or off

Pin Configuration

T Package

(TO-220-5)

ON/OFF

FEEDBACK

GND

OUTPUT

S Package

(TO-263-5)

ON/OFF

FEEDBACK

GND

OUTPUT

5

4

3

2

1

5

4

3

2

1

Metal Tab GND

Metal Tab GND