APW7080 Datasheet, PDF (13/23 Pages) Anpec Electronics Coropration – 4A, 26V, 380kHz, Asynchronous Step-Down Converter

APW7080
Typical Application Circuit (Cont.)
3. 4.5~5.5V Single Power Input Step-down Converter
C1
10µF
C3
1µF
R5
100kΩ
V_IN
VIN
4
VCC
3
UGND
9
LX
U1 LX ⁵
APW7080
2
EN
6 _COMP
FB ⁷
C2
1µF
L1
4A
D1
R1
1%
R4
GND
R2
C6
1%
C5
C7
(Optional)
V_IN
4.5~5.5V
V_OUT
0.8V~90%V_IN
C4
/4A
22µF
4. +12V Single Power Input Step-down Converter (with Electrolytic Input/Output Capacitors)
C1
2.2µF
V_IN
C8 ^+12V
470µF
C3
1µF
V_IN
C6
22pF
4
VIN
C2
1µF
3
VCC
UGND
9
LX
LX ⁵
R5
U1
D1
100kΩ ₂
APW7080
EN
6 _COMP
FB ⁷
R4
R2
56k
GND
15k
C5
1%
4700pF
L1
10uH
4A
R1
46.9k
1%
C7
33pF
V_OUT
+3.3V/4A
C4
470µF
(ESR=30mΩ)
Copyright © ANPEC Electronics Corp.
13
Rev. A.6 - Jun., 2008
www.anpec.com.tw