General Description

The MAX5077 is a +4.5V to +15V push-pull, current-fed topology driver subsystem with an integrated oscillator used in telecom module power supplies. The device drives two MOSFETs connected to a center-tapped transformer primary providing secondary-side, isolated, negative or positive voltages. The MAX5077 features a programmable accurate integrated oscillator with a synchronizing clock output to synchronize an external PWM regulator. A single external resistor programs the internal oscillator frequency from 50kHz to 1.5MHz.

Features

♦ Dedicated Current-Fed, Push-Pull Driver Subsystem

♦ Oscillator Frequency Programmable from 50kHz to 1.5MHz

♦ Single +4.5V to +15V Supply Voltage Range

♦ ±3A Peak Gate-Drive Current

♦ 1mA Operating Current at 250kHz with No Capacitive Load

♦ Selectable Synchronizing Clock Frequency for a Preceding PWM Stage

♦ Thermally Enhanced 14-Pin TSSOP

♦ -40°C to +125°C Operating Temperature Range