AP1538 DIODES [Diodes Incorporated], AP1538 Datasheet - Page 2

• Manufacturer Part Number: AP1538
• Description: 18V 3A 300KHz BUCK CONVERTER
• Manufacturer: DIODES [Diodes Incorporated]

Pin Assignments
Notes:
Pin Descriptions
AP1538 Rev. 2
Pin Name Pin No.
(1) SOP-8L
OCSET
Output
V
OCSET
V
FB
EN
CC
SS
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
V
avoid short circuit.
EN
FB
CC
1
2
3
4
5, 6
7, 8
2
3
4
1
( Top View )
Feedback pin
Power-off pin
H: Normal operation
L: Step-down operation stopped
Add an external resistor to set max output current
IC power supply pin
Switch Pin. Connect external inductor/diode here. Minimize trace
area at this pin to reduce EMI
GND Pin
(Step-down operation)
(All circuits deactivated)
Description
8
7
6
5
www.diodes.com
Output
Output
Vss
Vss
2 of 14
(2) SOP-8L-DEP (Dual Exposed Pads)
OCSET
V
18V 3A 300KHz BUCK CONVERTER
FB
EN
CC
1
2
3
4
( Top View )
(Note 3)
1
2
©
AP1538
8
7
6
5
Diodes Incorporated
JUNE 2008
Output
Output
Vss
Vss