General Description

The MIC2587 and MIC2587R are single-channel positive voltage hot swap controllers designed to provide safe insertion and removal of boards for systems that require live (always-powered) backplanes. These devices use few external components and act as controllers for external N-channel power MOSFET devices to provide inrush current control and output voltage slew rate control. Overcurrent fault protection is provided via programmable analog foldback current limit circuitry equipped with a programmable overcurrent filter.

Features

• MIC2587: Pin-for-pin functional equivalent to the LT1641

• Operates from +10V to +80V with 100V ABS MAX operation

• Industrial temperature specifications at VCC = +24V and VCC = +48V

• Programmable current limit with analog foldback

• Active current regulation minimizes inrush current

• Electronic circuit breaker for overcurrent fault protection

- Output latch off (MIC2587) or

- Output auto-retry (MIC2587R)

• Fast responding circuit breaker (< 2µs) to short circuit loads

• Programmable input undervoltage lockout

• Fault Reporting:

Open-drain “Power-is-Good” output for enabling DC/DC converter(s)

- Active-HIGH: MIC2587-1/MIC2587R-1

- Active-LOW: MIC2587-2/MIC2587R-2

Applications

• General-purpose hot board insertion

• High-voltage, high-side electronic circuit breaker

• +12V/+24V/+48V Distributed Power Systems

• +24V/+48V Industrial/Alarm Systems

• Telecom Systems

• Medical Systems