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150kHz 3A BUCK DC-DC CONVERTER AP3003

Data Sheet

Aug. 2008 Rev. 1. 2 BCD Semiconductor Manufacturing Limited

Functional Block Diagram

Figure 3. Functional Block Diagram of AP3003

/OFF

FEEDBACK

OUTPUT

GND

START UP

2.5V

REGULATOR

1.23V

REFERENCE

LATCH

150KHz

OSC

DRIVER

INV

THERMAL

SHUTDOWN

COMP

2.5V

Bias

Current

Frequency Shift

220

200

1:100

R1=2.49kΩ R2=4.18kΩ

R1=2.49kΩ R2=7.57kΩ

R1=2.49kΩ R2=21.8kΩ

For 3.3V

12V

ADJ

4.4Ω

R1=Open R2=0Ω

1 2 3 4 5 6 7 8 ... 15 16

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