ACT4072

Rev2, 27-May-08

Active-Semi

Innovative Power

TM

- 7 -

www.active-semi.com

Copyright © 2008 Active-Semi, Inc.

Figure 3:

ACT4072 5V/2A Output Application

: D1 is a 40V, 3A Schottky diode with low forward voltage, an IR 30BQ040 or SK34 equivalent. C4 can be either a ceramic capacitor

The SP-Cap is based on aluminum electrolytic capacitor technology, but uses a solid polymer electrolyte and has very stable capaci-

tance characteristics in both operating temperature and frequency compared to ceramic, polymer, and low ESR tantalum capacitors.

IC1

ACT4072

BS

IN

EN

COMP

FB

SW

G

ENABLE

Up to 30V

+

C1

10µF/35V

C2

1.5nF

R3

15k

C5

100pF

R2

12.1k

D1

L1 22µH/3A

C3

10nF

R1 39.2k

C4

22µF/10V

ceramic or

47µH/6.3 SP

Cap

5V/2A