General Description

The MAX5911/MAX5912 are fully integrated hot-swap switches for negative supply rails. These devices allow the safe insertion and removal of circuit cards into live backplanes or ports without causing problematic glitches on the negative power-supply rail. They also monitor various circuit parameters and disconnect the load if a fault condition occurs, alerting the host with a logic-level FAULT output. The MAX5911/MAX5912 operate over a voltage range of -16V to -65V and are designed to permit hot plugging of an IP phone into a hub, but are not limited to that operation.

Features

♦ Provides Safe Hot Swap for -16V to -65V Power Supplies

♦ 280mA Current Limit for MAX5911

♦ 415mA Current Limit for MAX5912

♦ Zero-Current Load Disconnect

♦ Integrated Power FET

♦ Status Output Reports Fault Condition

♦ Internal Switch-Protection Circuitry

♦ Built-In Thermal Shutdown

♦ DGND Can Vary Up to ±5V with Respect to AGND

Applications

    IP Phones

    Network Routers

    Network Switches

    Internet Appliances

    Power-Over-LAN