50KHz, 2A/3A PWM Buck DC/DC Converter
AP1512/A
Typical Application Circuit
(1) Adjustable Type Circuit
A. Vin=10V~60V, Vout=5V; Iout=0.3A~2A, Iout below 0.3A DCM
L1
Vin
1
Vin
2
OUTPUT
1
2
47uH
Vout
C1
100uF/100V
ON/OFF
C2
1u
AP1512/A
5
SD
GND
3
4
FB
D1
SR360
R2
C5
3K
1n
C7
C3
0.1u 470uF/16V
R3
1K
B. Vin=10V~60V, Vout=3.3V, Iout=0.3A~2A, Iout below 0.3A DCM
L1
Vin
1
Vin
2
OUTPUT
1
2
47uH
Vout
C1
100uF/100V
ON/OFF
C2
1u
AP1512/A
5
SD
GND
3
4
FB
D1
SR360
R2
C5
2K 1n
C7
0.1u
C3
470uF/16V
R3
1.2K
(2) Fixed Type Circuit
A. Vin=10V~60V, Vout=5V, Iout=0.7A~2A, Iout below 0.7A DCM
L1
Vin
1
Vin
2
OUTPUT
1
2
47uH
AP1512/A
C1
100uF/100V
C2 ON/OFF
1u
5
SD
GND
3
4
FB
D1
SR360
Vout
C7
C3
10n 470uF/16V
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Oct. 14, 2005
7/12