General Description

The MAX5963 dual hot-swap and diode ORing controller provides complete protection for dual-supply high availability systems. The device operates from 7.5V to 76V and provides hot-swap and low voltage-drop diode ORing functionality for two 7.5V to 76V outputs.

The MAX5963 allows for the safe insertion and removal of system line cards and FireWire? peripherals into a live backplane by providing inrush current control and active current limiting. The device controls external ?n-channel power MOSFETs to perform low-voltage-drop ORing, inrush current control, and current limiting functions. The current-limit function actively limits the current drawn by the load, protecting the load from a short-circuit condition. The MAX5963 also features a circuit-breaker function that disconnects the power to the load if the load current exceeds the circuit-breaker limit for a programmable circuit-breaker timeout.

Features

? Hot Swaps Two 7.5V to 76V Supplies

? Integrates Low-Voltage-Drop ORing Controller

? ±5 Accuracy Bilevel Active Current Limit/Circuit

? ?Breaker

? Programmable Current-Limit/Circuit-Breaker

? ?Timeout

? 10μA Power-Off Mode Current

? Protects Up to Two FireWire Ports

? System Power-On/Off ORing

? Latchoff or Autoretry Power Management

? Independent ON/OFF Control Allows

? ?Undervoltage Lockout Programming

? Fast Load Disconnect through FOSO Input

? ?(FireWire Port)

Applications

? ?Blade Servers

? ?Base-Station Line Cards

? ?Network Switches/Routers

? ?FireWire Desktops/Notebook Ports

? ?FireWire Hubs