APW1172KAC-TR データシートの表示（PDF） - Anpec Electronics

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APW1172KAC-TR

2.5A SWITCH STEP DOWN SWITCHING REGULATOR

Anpec Electronics 

APW1172

Layout Consideration

1. Please solder the Exposed Pad on the PCB.The heat generated by the power consumption will conduct by

the thermal pad.

2. Please place the input capacitors for VCC pin nearly as close as possible.

3. Connect the switching inductor and the Schottky diode and OUT pin by a wide track.

4. Place the output capacitor close to the inductor as possible and with a wide and short track.

5.The thermal pad is needed to improve the power dissipation.

VOUT = 3.3V

L

22uH

CO U T

100uF

D1

1N5819

R C1

4.3K

CC1

2.2nF

1 OUT

V CC 8

2 SYNC

GND

7

3 INH

VREF 6

4 COMP

FB 5

APW1172

C C2

220pF

R F1

5.6K

VREF = 3.3V

R F2

3.3K

C IN

V IN

22uF 4.8V to 22V

Copyright © ANPEC Electronics Corp.

17

Rev. A.4 - Aug., 2005

www.anpec.com.tw

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