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部品番号 AP3503F
部品説明 3A Synchronous DC-DC Buck Converter
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AP3503F Datasheet, AP3503F PDF,ピン配置, 機能
Data Sheet
340kHz, 3A Synchronous DC-DC Buck Converter
AP3503F
General Description
The AP3503F is a 340kHz fixed frequency, current
mode, PWM synchronous buck (step-down) DC-DC
converter, capable of driving a 3A load with high
efficiency, excellent line and load regulation. The
device integrates N-channel power MOSFET
switches with low on-resistance. Current mode
control provides fast transient response and
cycle-by-cycle current limit.
The AP3503F employs complete protection to ensure
system security. Including output Over Voltage
Protection, input Under Voltage LockOut,
programmable soft-start, Over Temperature
Protection to safeguard the circuit.
This IC is available in PSOP-8 package.
Features
• Input Voltage Range: 4.5V to 18V
• Fixed 340kHz Frequency
• High Efficiency: up to 95%
• Output Current: 3A
• Current Mode Control
• Built-in Over Current Protection
• Built-in Thermal Shutdown Function
• Built-in UVLO Function
• Built-in Over Voltage Protection
• Programmable Soft-start
Applications
• LCD TV
• Set Top Box
• Portable DVD
• Digital Photo Frame
Oct. 2012 Rev. 1. 3
PSOP-8
Figure 1. Package Type of AP3503F
BCD Semiconductor Manufacturing Limited
1

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AP3503F pdf, 電子部品, 半導体, ピン配列
340kHz, 3A Synchronous DC-DC Buck Converter
Functional Block Diagram
Data Sheet
AP3503F
2
IN
1.5V
SHUTDOWN
COMPARATOR
INTERNAL
REGULATOR
VA
VB
SLOP
COMP
0.3V
SCP
OSCILLATOR
90 k/340k
CURRENT
SENSE
AMPLIFIER
+
EN 7
LOCK
COMPARATOR
CLK
S
R
PWM
COMPARATOR
Q
Q
2. 5V
VB
SS 8
6A
EA
5 0. 925V
FB
6
COMP
1. 3 V
Figure 3. Functional Block Diagram of AP3503F
Ordering Information
AP3503F
-
VA
1 BS
M1
3 SW
M2
4 GND
Circuit Type
Package
MP: PSOP-8
G1: Green
TR: Tape & Reel
Blank: Tube
Package
PSOP-8
Temperature
Range
-40 to 85°C
Part Number
AP3503FMP-G1
AP3503FMPTR-G1
Marking ID
3503FMP-G1
3503FMP-G1
Packing Type
Tube
Tape & Reel
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant
and green.
Oct. 2012 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
3





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