ACT4088

Rev0, 13-May-08

- 9 -

www.active-semi.com

Copyright © 2008 Active-Semi, Inc.

TIME: 200µs/div

CH1

CH2

Circuit of Figure 3

TIME: 400ns/div

Circuit of Figure 3

Figure 3:

ACT4088 Optimized for Minimal External Components

The ACT4088 with provides excellent AC and DC results across a wide range of external component combinations. The circuit of

Figure 3 can be used to generate a 5V output from a 12V input utilizing a smaller (i.e. lower-cost) output capacitor while maintaining

good performance.

CH1

CH2

Figure 4:

Figure 5:

ACT4088

IN

EN

BST

SW

FB

G

C1

10µF

D1

B240A

C3

22nF

L1

4.7µH

C2

4.7µF

5V

150k?

1%

28.7k?

1%

6

5

4

3

2

1

OFF

ON

Ω

Ω