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300Khz, 2.5A PWM Buck DC/DC Converter
AP1503
Ordering Information
AP1503 XX X X X
Output version
-33 : 3.3V
Block Diagram
Package
S : SOP-7L
Lead Free
Packing
Blank : Normal
Blank : Tube
L : Lead Free Package A : Taping
SD
Current
Source
bias
1.235V
Reference
2.5V
Regulator
Start
up
200mV
220mV
+
Com_p
VIN
Comp
+
VB
+
Frequecy
FB
_Amp
compen-
sation
Comp
+
Pre-driver
3A
Switch
300kHz
OSC.
Thermal
Limit
VO
GND
COMP
Anachip Corp.
www.anachip.com.tw
Rev.A3 Mar. 11 2004
2/5