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Part Name
Description
AP3003T-12TRE1 View Datasheet(PDF) - BCD Semiconductor
Part Name
Description
Manufacturer
AP3003T-12TRE1
150kHz 3A BUCK DC-DC CONVERTER
BCD Semiconductor
AP3003T-12TRE1 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=2.49k
Ω
R2=4.18k
Ω
5V R1=2.49k
Ω
R2=7.57k
Ω
12V R1=2.49k
Ω
R2=21.8k
Ω
ADJ R1=Open R2=0
Ω
LATCH
220 200
mV mV
+
COMP
_
_
COMP
+
DRIVER
&
INV
THERMAL
SHUTDOWN
Figure 3. Functional Block Diagram of AP3003
Data Sheet
AP3003
1
4.4
Ω
V
IN
1:100
2
OUTPUT
3
GND
Feb. 2007 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
3
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