Pin Assignments
AP1534
PWM CONTROL 2A STEP-DOWN CONVERTER
( Top View )
FB 1
EN 2
OCSET 3
VCC 4
AP1534
8 Vss
7 Vss
6 Output
5 Output
SOP-8L
Pin Descriptions
Pin Name
FB
EN
OCSET
VCC
Output
VSS
Pin No.
1
2
3
4
5, 6
7, 8
Description
Feedback pin
Power-off pin
H: Normal operation
(Step-down operation)
L: Step-down operation stopped
(All circuits deactivated)
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
AP1534 Rev. 5
2 of 10
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FEBRUARY 2009
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