ACT4070
Figure 3:
ACT4070 2.5V/3A Output Application
4.5V to 30V
V
IN
ENABLE
IN
BS
C3
10nF
SW
L1 10µH/4A
R1 14k
2.5V/3A
V
OUT
IC1
ACT4070
EN
G
C2
(C
COMP
)
3.3nF
R3
(R
COMP
)
5.6k
FB
D1
40V
3A
COMP
C4 (C
OUT
)
22µF/10V
ceramic or
47µH/6.3 SP
Cap
+
C1
10µF/35V
C5
(C
COMP2
)
220pF
R2
13k
:
D1 is a 40V, 3A Schottky diode with low forward voltage, an IR 30BQ040 or SK34 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 Products.
Active Solutions.
-7-
Copyright © 2006 Active-Semi, Inc.
ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
