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General Description

The MAX5058/MAX5059 enable secondary-side synchronous rectification in isolated power supplies using widely available power MOSFETs. These devices facilitate the commutation of the secondary-side MOSFETs by providing a clean gate-drive signal that is synchronized to the power MOSFET switching in the primary side of the isolation transformer.

Features

? Clean Drive Waveforms for Synchronous

?? MOSFETs

? Utilization of a Look-Ahead Signal from the

?? Primary for Proper Turn-On/Turn-Off Times

? Synchronous Rectifier Drivers Capable of

?? Sourcing and Sinking Up to 2A Peak Current

? Internal Gate-Voltage Regulator for 5V (MAX5058)

?? or 10V (MAX5059) Gate-Drive Voltage

? Internal Error Amplifier

? Accurate Differential Current-Share/Force Circuit

?? Allows Paralleling of Several Power Supplies for

?? High Output Current

? Internal Remote Voltage-Sense Amplifier

? Flexible Reference-Voltage Generation

? Output Voltage Regulation Down to 0.5V

? Low Quiescent Current Consumption of 2.5mA

? Integrated Digital Output Margining Circuit Saves

?? External Parts and Board Space

? 30ns Propagation Delay Time from Pulse Input

?? to Output

? Automatic Detection of Discontinuous Current

?? Conduction and Turn-Off of the Freewheeling

?? MOSFET

? High Efficiency at Low Output Currents and

?? Reverse-Current Protection

? Open-Drain Overtemperature Warning Flag

? 28-Pin Thermally Enhanced TSSOP Package

Applications

?? Isolated Telecom Power Supplies

?? Isolated Networking Power Supplies

?? ¡À48V Power-Supply Modules

?? Industrial Power Supplies

?? ¡À48V/¡À12V Server Power Supplies