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Ap3503, Data sheet, Typical application – Diodes AP3503 User Manual

Page 9

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Data Sheet

340kHz, 3A Synchronous DC-DC Buck Converter AP3503

May. 2012 Rev. 1. 7 BCD Semiconductor Manufacturing Limited

9

Typical Application

C3
3.3nF

C12

10µF/25V

C22

22µF/25V

D1

Optional

L 10µH

R4

100k

R2

10k

R1
26.1k

R3

13k

C6

Optional

C4

10nF

C5

0.1µF

3

5

1

6

7

8

2

4

AP3503

BS

IN

SW

GND

FB

COMP

EN

SS

C21
22µF/25V

C11
10µF/25V

Input Voltage=12V

Output Voltage=3.3V



Figure 16. Typical Application of AP3503