Diodes AP3421/A/B - Manual (Page 12)

Preliminary Datasheet
1.3MHz, Dual 1.0A Synchronous Step-down Converters AP3421/A/B
Feb. 2013 Rev. 1. 4 BCD Semiconductor Manufacturing Limited
12
Typical Application
PVIN AVIN VMON
E/S
SW1
FB1
PGND
POR
SW2
FB2
L1 3.3 L2 3.3 AGND
V
IN
=5V
C1
10 F
C1'
1 F
V
O2
=1.2V V
O1
=2.5V
84.5k
4.7k
24.9k
30.1k
20k
C3
10 F
C2
10 F
C2'
10 F
4.02k
20k
OFF ON
Figure 20. Typical Application Circuit of AP3421 (Note 2)