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Preliminary Datasheet

380kHz, 2A Asynchronous DC-DC Buck Converter AP3201A

Mar. 2011 Rev. 1. 0 BCD Semiconductor Manufacturing Limited

General Description

The AP3201A is a 380kHz fixed frequency, current

mode, PWM buck (step-down) DC-DC converter,

capable of driving a 2A load with high efficiency,

excellent line and load regulation. The device

integrates N-channel power MOSFET switch with

low on-resistance. Current mode control provides fast

transient response and cycle-by-cycle current limit.

A standard series of inductors are available from

several different manufacturers optimized for use

with the AP3201A. This feature greatly simplifies the

design of switch-mode power supplies.

This IC is available in HMSOP-10 package.

Features

• Input Voltage Range: 4.75V to 18V

• Fixed 380kHz Frequency

• High Efficiency: up to 93%

• Output Current: 2A

• 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 AP3201A

HMSOP-10

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