150KHz, 3A PWM Buck DC/DC Converter + 1A Ultra Low
Drop Regulator
Ordering Information
AP1516 XX X X
Output version
Ch1: Blank : Adjustable
-33 : 3.3V
Package
S: SOP-16L
Packing
Blank : Tube
A : Taping
AP1516
Block Diagram
SD
VIN1
200mV 220mV
Current
Source
bias
1.235V
Reference
2.5V
Regulator
Start
up
+
Com_p
Comp
+
+
Frequecy
FB1
_Amp
compen-
sation
Comp
+
Pre-driver
3A
Switch
150kHz
OSC.
Thermal
Limit
VOUT1
GND
VIN2
VB
+
CURRENT
LIMIT
1.25V +
VOUT2
VSENSE2
THERMAL
SHUTDOWN
FB2
Anachip Corp.
www.anachip.com.tw
Rev.1.1 May 23, 2005
2/10