Diodes AP3503 Bedienungsanleitung PDF herunterladen

Data Sheet

340kHz, 3A Synchronous DC-DC Buck Converter AP3503

May. 2012 Rev. 1. 7 BCD Semiconductor Manufacturing Limited

General Description

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. Current mode

control provides fast transient response and

cycle-by-cycle current limit.

The AP3503 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

Figure 1. Package Type of AP3503

PSOP-8

1 2 3 4 5 6 ... 10 11