APW1172
Other Application Circuits
Dual output voltage application
N1/N2=2
1N4148
VREF = 3.3V
VOUT2 = 5V
VOUT1 = 3.3V
1
2
3
4
8
7
6
5
OUT
VCC
GND
VREF
FB
SYNC
INH
L
RF1
22uH
5.6K
COMP
RC1
APW1172
D1
COUT2
RF2
COUT1
4.3K
CIN
1N5819
VIN=5V
47uF
3.3K
100uF
22uF
CC1
CC2
2.2nF
220pF
BuckBoost regulator
VREF = 3.3V
VOUT = -12V
L
15uH
1
2
3
4
8
7
6
5
OUT
VCC
GND
VREF
FB
SYNC
INH
D1
1N5819
COMP
RC1
4.3K
APW1172
RF2
24K
RF1
COUT
VIN=5V
CIN2
CIN1
2.7K 100uF
22uF25V 22uF
CC1
CC2
2.2nF 220pF
Copyright ã ANPEC Electronics Corp.
6
www.anpec.com.tw
Rev. A.4 - Aug., 2005