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MA2004

Major Power Technology Co., Ltd.

Rev.1.0 Apr/15, 2015

Soft-Start

The MA2004 includes a soft-start timer that limits the voltage at the error amplifier output

during startup to prevent excessive current at the input. This prevents premature

termination of the source voltage at startup due to inrush current. This also limits the

inductor current at startup, forcing the input current to rise slowly to the amount required to

regulate the output voltage during soft-start.

Current Limit

A resistor between OC and GND pin programs peak switch current. The resistor value

should be between 10k to 135k. the current limit will be set from 3.3A to 1A. Keep traces at

pin as short as possible. Do not put capacitance at OC pin. To set the over current point

according to the following equation:

ICL=180000/(45k +R3)

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TYPICAL CHARACTERISTICS