Description

The FAN1577A is a high-efficiency, voltage-mode, dualchannel, synchronous DC/DC PWM controller for two independent outputs. The two channels are operated out of phase. The internal reference voltage is trimmed to 0.7V±1.0. It is connected to the error amplifier’s positive terminal for voltage feedback regulation.

Features

■ Integrates Two Sets of MOSFET Drivers

■ Two Independent PWM Controllers

■ Constant Frequency Operation: Free-running Fixed-Frequency Oscillator Programmable: 61kHz to 340kHz

■ Maximum Input Supply Voltage: 15V

■ Programmable Output as Low as 0.7V

■ Internal Error Amplifier Reference Voltage: 0.7V ±1.0

■ Two Soft-Start / EN Function Pins

■ Programmable Over-Current Protection (OCP)

■ 30V HIGH Voltage Pin for Bootstrap Voltage

■ Output Over-Voltage Protection (OVP)

■ 20-Pin SOP

Applications

■ CPU and GPU Vcore Power Supply

■ Power Supply Requiring Two Independent Outputs