AP3503
Description
The AP3503 is a 340k Hz 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 onresistance. Current mode control provides fast transient response and cycle-by-cycle current limit.
The AP3503 employs plete protection to ensure system security. Including output Over Voltage Protection, input Under Voltage Lock Out, programmable soft-start, Over Temperature Protection to safeguard the circuit.
This IC is available in PSOP-8 package.
Pin Assignments
(Top View)
BS 1 IN 2 SW 3 GND 4
8 SS
7 EN EP
6 P 5 FB
PSOP-8
Features
- Input Voltage Range: 4.5V to 18V
- Fixed 340k Hz 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...
