AP1520(2007) 데이터 시트보기 (PDF) - Diodes Incorporated.
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AP1520 Datasheet PDF : 8 Pages
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Typical Application Circuit
AP1520
PWM CONTROL 2A STEP-DOWN CONVERTER
VIN
Vcc
Output
ROCSET COCSET
3K
Option
AP1520
CIN
OCSET
FB
680uF
EN
VSS
CVcc
REN
100K
0.1uF
CEN
0.1uF
L1
22uH
CC
Optional
D1*
VOUT
RA
6.8K
+
+
C
- 0.1uF-
RB
1.3K
COUT
470uF
Note: VOUT = VFB x (1+RA/RB)
RB=0.7K~5K ohm
VOUT
L1 Value
VIN = 12V, IMAX = 2A
2.5V
3.3V
22uH
27uH
*D1 = Diodes Inc. part number DFLS230L or SBR3U30P1.
Typical Performance Characteristics
5V
33uH
AP1520 Vin vs. Frequency
(Vout=3.3V; Iout=0.2A)
350
345
340
335
330
325
320
315
310
3.6 4 6 8 10 12 14 16 18
Vin (V)
AP1520 Vin vs. FB
(Vout=3.3V; Iout=0.2A)
0.84
0.83
0.82
0.81
0.80
0.79
0.78
0.77
0.76
0.75
0.74
3.6 4 6 8 10 12 14 16 18
Vin (V)
AP1520 Rev. 1
4 of 8
www.diodes.com
JANUARY 2007
© Diodes Incorporated
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