Diodes AP5004 - Manual (Page 2)

AP5004
PWM CONTROL 2.5A STEP-DOWN CONVERTER
AP5004
Document number: DS31444 Rev. 5 - 2
2 of 11
www.diodes.com
August 2010
© Diodes Incorporated
Typical Application Circuit
Vboost
GND VCC
AP5004
GND
VCC
Output
FB
EN
5
6
VIN
C3
0.1uF
1
C2
220uF/63V
8
3 4
2
7
D1
B340
R1
685ohm
L1-(WURTH 744132)
33uH
C5
0.1uF
C1
100pF
VOUT = 5V
R5
100K
C6
0.1uF
U1
C7 0.1uF
1 2
R2
130ohm
C4
470uF/16V
Note: V
OUT
= V
FB
x (1+R1/R2)
R
B
= 100 ~ 300 ohm
Notes: 2. Suggested DIODES Power Schottky P/N: PDS540 or B540C.
Pin Descriptions
Pin Name Pin # Description
EN 1
H: Normal operation
L: Step-down operation stopped
FB 2 Feedback pin
V
boost
3 High-side gate driver boost pin
Output 4 Switch output pin
V
CC
5、6 V
CC
GND 7、8 GND pin