BCD Semiconductor Manufacturing Limited AP3503
The AP3503 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. The AP3503 employs complete protection to ensure system security.| Part No. | AP3503 |
|---|---|
| Datasheet | AP3503 Download |
| Manufacturer |  BCD Semiconductor Manufacturing Limited |
| Description | 3A Synchronous DC-DC Buck Converter |
| Buy | Stock & Price |
GENERAL DESCRIPTION
Current mode control provides fast transient response and cycle-by-cycle current limit. 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 PSOP-8 Figure 1. Package Type of AP3503 May. 2012 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 1 340kHz, 3A Synchronous DC-DC Buck Converter Pin Configuration MP Package (PSOP-8) Data Sheet AP3503 18 27 36 45 Pin
DESCRIPTION
Figure 2. Pin Configuration of AP3503 (Top View) Pin Number 1 2 3 4 5 6 7 8 Pin Name BS IN SW GND FB COMP EN SS EP Function Bootstrap pin.
