ACT4012A
Rev0, 16-May-08
Figure 3:
ACT4012A 5V/1.5A Output Application
V
IN
7.5V to 20V
IN
EN
G
BS
SW
C3
10nF
L1 22µH/2A 5V/1.5A
R1 37k
V
OUT
ACT4012A
ENABLE
FB
COMP
C2
1.5nF
R3
15k
C5
(OPTIONAL)
+
C1
10µF/
25V
R2
13k
D1
C4
22µF/10V
Ceramic
: D1 is a 30V, 2A Schottky diode with low forward voltage, an IR 20BQ030 or SK23 equivalent. C4 can be either a ceramic capacitor
(Panasonic
ECJ-3YB1C226M)
or SP-CAP (Specialty Polymer) Aluminum Electrolytic Capacitor such as Panasonic EEFCD0J470XR.
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.
Innovative Power
TM
-7-
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ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
