Instruction Manual

AP1509
150KHz, 2A PWM BUCK DC/DC CONVERTER
AP1509
Document number: DS31016 Rev. 4 - 2
3 of 13
www.diodes.com
June 2010
© Diodes Incorporated
Pin Descriptions
Functional Block Diagram
Current
Source
bias
1.235V
Reference
2.5V
Regulator
150kH
z
OSC.
Start
up
+
+
_
+
_
Thermal
Shutdown
Pre-
driver
Comp
Comp
GND
Output
V
IN
SD
FB
220mV
200mV
2A
Switch
+
_
_
Amp
Comp
Frequecy
compen-
sation
Pin Name Description
V
IN
Operating voltage input
Output Switching output
GND Ground
FB Output voltage feedback control
SD ON/OFF Shutdown