AP3003S-12E1 查看數據表（PDF） - BCD Semiconductor
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AP3003S-12E1 Datasheet PDF : 16 Pages
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150kHz 3A BUCK DC-DC CONVERTER
Functional Block Diagram
ON/OFF
5
1.23V
REFERENCE
Bias
Current
2.5V
REGULATOR
START UP
2.5V
Frequency Shift
150KHz
OSC
FEEDBACK 4
R2
+
EA
_
+
COMP
_
R1 For 3.3V R1=2.49kΩ R2=4.18kΩ
5V R1=2.49kΩ R2=7.57kΩ
12V R1=2.49kΩ R2=21.8kΩ
ADJ R1=Open R2=0Ω
LATCH
220 200
mV mV
+
COMP
_
_
COMP
+
DRIVER
&
INV
THERMAL
SHUTDOWN
Figure 3. Functional Block Diagram of AP3003
Data Sheet
AP3003
1
4.4Ω
VIN
1:100
2 OUTPUT
3 GND
Feb. 2007 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
3
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