AP1538SG-U 查看數據表（PDF） - Diodes Incorporated.
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AP1538SG-U Datasheet PDF : 14 Pages
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AP1538
18V 3A 300KHz BUCK CONVERTER
Pin Assignments
(1) SOP-8L
( Top View )
(2) SOP-8L-DEP (Dual Exposed Pads)
( Top View )
FB 1
EN 2
OCSET 3
VCC 4
8 Vss
7 Vss
6 Output
5 Output
FB 1
EN 2
OCSET 3
VCC 4
1
2
(Note 3)
8 Vss
7 Vss
6 Output
5 Output
Notes: 3. Exposed pad 1 is connected to VSS and exposed pad 2 is connected to Output. The board layout for exposed pads needs to be considered to
avoid short circuit.
Pin Descriptions
Pin Name Pin No.
Description
FB
1 Feedback pin
EN
OCSET
VCC
Output
Power-off pin
H: Normal operation
2
(Step-down operation)
L: Step-down operation stopped
(All circuits deactivated)
3 Add an external resistor to set max output current
4 IC power supply pin
5, 6
Switch Pin. Connect external inductor/diode here. Minimize trace
area at this pin to reduce EMI
VSS
7, 8 GND Pin
AP1538 Rev. 2
2 of 14
www.diodes.com
JUNE 2008
© Diodes Incorporated
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