SAMHOP Microelectronics Corp.
SM8313F
52KHz, 3A PWM Buck Switching Regulator
ꢀTypical Application Circuit
(A) Fixed Type Circuit
FB
12V
DC Input
4
3.3V/3A
Output Load
L1
Output
1
2
SM8313F
Vin
Inductor
5
3
SD
Gnd
Cin
Capacitor
Co
Capacitor
D1
Schottky Diode
(B) Adjustable Type Circuit
R2
R1
FB
12V
DC Input
4
3.3V/3A
Output Load
L1
Output
SM8313F 2
1
Vin
68uF
5
3
Gnd
SD
Cin
Co
D1
680uF
1000uF
1N5824
Vout = VFB x (1+ R1/R2 )
VFB=1.23V
7
V1.0 May 17 ,2007