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Part Name
Description
AP1538SG-U View Datasheet(PDF) - Diodes Incorporated.
Part Name
Description
Manufacturer
AP1538SG-U
18V 3A 300KHz BUCK CONVERTER
Diodes Incorporated.
AP1538SG-U Datasheet PDF : 14 Pages
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Typical Application Circuit
AP1538
18V 3A 300KHz BUCK CONVERTER
V
IN
Vcc
Output
R
OCSET
C
OCSET
3K Option
AP 1538
C
IN
OCSET
FB
470uF
EN
V
SS
CVcc
R
EN
100K
0.1uF
C
EN
0.1uF
L1
22uH
Cc
Option
(Note 8)
D1
(Note 6)
V
OUT
= 5V/3A
R
A
6.8K
+
-
R
B
1.3K
+
C
0.1uF
-
C
OUT
470uF
(Note 7)
V
OUT
=V
FB
x (1+ R
A
/R
B
)
R
B
= 0.7K~5 K ohm
Notes:
6. Suggested DIODES Power Schottky P/N: B340 series or PDS340.
7. Suggested C
OUT
for V
OUT
< 1V; 680
μ
F.
8. Typical feedback compensation (Cc): 5600pF.
AP1538 Rev. 2
5 of 14
www.diodes.com
JUNE 2008
©
Diodes Incorporated
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