Diodes Incorporated 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 onresistance. The AP3503 employs complete protection to ensure system security.| Part No. | AP3503 |
|---|---|
| Datasheet | AP3503 Download |
| Manufacturer |  Diodes Incorporated |
| Description | 340kHZ 3A SYNCHRONOUS DC-DC BUCK CONVERTER |
| Buy | Stock & Price |
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. Pin Assignments (Top View) BS 1 IN 2 SW 3 GND 4 8 SS 7 EN EP 6 COMP 5 FB PSOP-8FEATURES
● 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 AP3503 Document number: DS41526 Rev. 2 - 2 1 of 10 October 2018 © Diodes Incorporated AP3503 Typical
APPLICATIONS
Circuit Input Voltage=12V Output Voltage=3.3V L 10μH C21 C22 22μF/25V 22μF/25V C4 10nF 1 BS 2 IN 3 SW 4 GND AP3503 8 SS 7 EN COMP 6 FB 5 D1 Opt...
