General Description

The MAX5079 ORing MOSFET controller replaces ORing diodes in high-reliability redundant, parallel-connected power supplies. Despite their low forward-voltage drop, ORing Schottky diodes cause excessive power dissipation at high currents. The MAX5079 allows for the use of low-on-resistance n-channel power MOSFETs to replace the Schottky diodes. This results in low power dissipation, smaller size, and elimination of heatsinks in high-power applications.

Features

♦ 2.75V to 13.2V Input ORing Voltage

♦ 1V to 13.2V Input ORing Voltage with 2.75V Aux Voltage Present

♦ 2A MOSFET Gate Pulldown Current During Fault Condition

♦ Ultra-Fast 200ns, MOSFET Turn-Off During Fault Condition

♦ Supply Undervoltage and Bus Overvoltage Detection

♦ Power-Good (PGOOD) and Overvoltage (OVP) Outputs for Fault Detection

♦ Space-Saving 14-Pin TSSOP Package

♦ -40°C to +85°C Operating Temperature Range