General Description

The APW7158 has two synchronous buck PWM controllers with high precision internal references voltage to offer accurate outputs. The PWM controllers are designed to drive two N-channel MOSFETs in synchronous buck topology. The device requires 12V and 5V power supplies. If the 5V supply is not available, the device can offer an optional shunt regulator 5.8V for 5V supply.

Features

• Two Synchronous Buck Converters(OUT1,OUT2)

• Converter Input Voltage Range up to 12V

• 0.6V Reference for OUT1 with 0.8 Accuracy

• 3.3V Reference for OUT2 with 0.8 Accuracy

• Both Outputs have Independent Soft-Start and Enable Functions

• Internal 300kHz Oscillator and Programmable Frequency Range from 70 kHz to 800kHz

• 180 Degrees Phase Shift etween OUT1 and OUT2

• Short-Circuit Protection

• Thermally Enhanced SOP-20 Package

• Lead Free and Green Devices Available (RoHS Compliant)

Applications

• Graphic Cards

• Low-Voltage Distributed Power Supplies

• SMPS Application