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Data Sheet

340kHz, 2A Synchronous DC-DC Buck Converter AP3502E

Dec. 2012 Rev. 1. 5 BCD Semiconductor Manufacturing Limited

General Description

The AP3502E is a 340kHz fixed frequency, current

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

converter, capable of driving a 2A load with high

efficiency, excellent line and load regulation. The

AP3502E exhibits high efficiency at light load. 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 AP3502E employs complete protection to ensure

system security. Including output Over Voltage

Protection, input Under Voltage Lock Out,

programmable Soft Start, Over Temperature

Protection and hiccup mode Short Circuit Protection.

This IC is available in SOIC-8 package.

Features

• Input Voltage Range: 4.5V to 18V

• Fixed 340kHz Frequency

• High Efficiency at Light Load

• High Efficiency: up to 95%

• 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

• Hiccup Mode SCP

Applications

• LCD TV

• Set Top Box

• Portable DVD

• Digital Photo Frame

Figure 1. Package Type of AP3502E

SOIC-8

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