NOT RECOMMENDED FOR NEW
DESIGN, USE AP5004
AP1580
PWM CONTROL 3A STEP-DOWN CONVERTER
Typical Application Circuit
VIN
CIN
220uF
Cboost 0.1uF
REN
100K
Vboost
Output
Vcc AP1580
FB
GN
EN
D
CEN
0.1uF
L1
33uH
CC
1nF
D1
PDS 540
Note: VOUT = VFB x (1+RA/RB)
RB = 100 ~ 300 ohm
VOUT =5V
RA
680 ohm
+
-
RB
130 ohm
COUT
470uF
AP1580 Rev. 2
4 of 9
www.diodes.com
July 2008
© Diodes Incorporated