AP5002_09 Datasheet, PDF (5/10 Pages) Diodes Incorporated – PWM CONTROL 2A STEP-DOWN CONVERTER

Typical Application Circuit
AP5002
PWM CONTROL 2A STEP-DOWN CONVERTER
VIN+12V
C2
22uF
C3
0.1uF
R5
100K
ON/OFF
C6
0.1uF
U1
1 _FB
VSS ⁸
2 _EN
VSS ⁷
3
COMP
6
Output
4 _VCC
Output ⁵
AP5002
R4
0.8~2K
C7
0.1uF
L1-(WURTH S05100104)
10uH
1
2
D1
Dii 723
B340A
R1
3.8K
C1
330pF
R2
1.2K
VOUT = 3.3V
C8
0.1uF
C4
22uF
Compensation Capacitor Selection(MLCC)
VIN
VOUT
R4
C7
12V
5/ 3.3/ 2.5/ 1.8/ 1.5V
0.8~2K
0.1µF
5V
3.3/ 2.5/ 1.8/ 1.5V
0.8~2K
27nF
C1
330pF
330pF
VIN+12V
C2
470uF
C3
0.1uF
R5
100K
ON/OFF
C6
0.1uF
U1
1 ^FB
VSS ₈
2 ^EN
VSS ₇
3 ^COMP
Output
6
4 ^VCC
Output
5
AP5002
R4
4.7~6.8K
C7
33nF
Notes:
4. VOUT = VFB _{× (1+} ^R1 )
R2
L1-(WURTH S05100104)
10uH
1
2
D1
Dii 723
B340A
R1
3.8K
C1
330pF
R2
1.2K
VOUT = 3.3V
C8
0.1uF
C4
470uF
AP5002 Rev. 8
5 of 10
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FEBRUARY 2009
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