Preliminary Datasheet
340kHz, 3A Synchronous DC-DC Buck Converter AP3503E
May. 2012 Rev. 1. 6 BCD Semiconductor Manufacturing Limited
3
TR: Tape & Reel
Blank: Tube
Functional Block Diagram
S
R
Q
Q
INTERNAL
REGULATOR
OSCILLATOR
2
7
5
4
3
1
VA
BS
SW
GND
EA
6
COMPFB
EN
IN
COMPARATOR
8
SS
CURRENT
SENSE
AMPLIFIER
CLK
SLOP
COMP
PWM
COMPARATOR
1.1V
+
SCP
VA
VB
VB
5
A
90K/340K
0.
925V
2.5V
M1
M2
0.3V
COMPARATOR
1.5V
SHUTDOWN
LOCK
Figure 3. Functional Block Diagram of AP3503E
Ordering Information
AP3503E -
Circuit Type
Package
Temperature
Range
Part Number Marking ID Packing Type
PSOP-8
-40 to 85°C
AP3503EMP-G1 3503EMP-G1 Tube
AP3503EMPTR-G1 3503EMP-G1 Tape & Reel
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS
compliant and green.
G1: Green
Package
MP: PSOP-8
