GENERAL DESCRIPTION
The device regulates the forward voltage drop across the ORing MOSFETs to ensure smooth current transfer from one supply to the other without oscillation. The ORing MOSFET turns on quickly to reduce the load voltage droop during supply switchover. If the input supply fails or is shorted, a fast turn-off minimizes reverse-current transients. The device implements a foldback current limit during hotswap startup in order to control inrush current, thereby lowering di/dt and keeping the operation of the hot-swap MOSFET under safe operating area (SOA). An internal 70ms timer starts counting when the device enters the hot-swap startup phase. After the hot-swap startup cycle is completed, on-chip comparators provide active currentlimit protection against short-circuit and overcurrent faults. The load is disconnected from the input quickly in the event of a fault condition. The device provides current monitoring from 3A to 10A (VIN = 12V, TA = +25°C with RSENSE = 3mΩ) with ±0.6% accuracy.
Maxim Integrated
