General Description

The MIC2589 and MIC2595 are single-channel, negative voltage hot swap controllers designed to address the need for safe insertion and removal of circuit boards into “live” system backplanes, while using few external components. The MIC2589/MIC2589R and the MIC2595/MIC2595R are each available in 14-pin SOIC packaging and work in conjunction with an external N-Channel MOSFET for which the gate drive is controlled to provide inrush current limiting and output voltage slew-rate control. Overcurrent fault protection is also provided via a programmable overcurrent threshold and filter. Very fast fault response is provided to ensure that system power supplies maintain regulation even during output short circuits.

Features

• Provides safe insertion and removal from live –48V (nominal) backplanes

• Operates from –19V to –80V

• Fast responding circuit breaker (<1µs) to short circuit conditions

• User-programmable overcurrent detector response time

• Electronic circuit breaker function:

Output latch OFF (MIC2589/MIC2595)

Output auto-retry (MIC2589R/MIC2595R)

• Active current regulation to control inrush currents

• Programmable undervoltage and overvoltage lockouts (MIC2589/MIC2589R)

• Programmable UVLO hysteresis (MIC2595/MIC2595R)

• Staggered ‘Power-Good’ output signals provide load sequencing

Active-HIGH (-1)

Active-LOW (-2)

Applications

• Central office switching

• –48V power distribution

• Distributed power systems

• AdvancedTCA