Microchip | MIC2587R-2YM

The MIC2587R-2YM is a 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. These protection circuits combine to limit the power dissipation of the external MOSFET to insure that the MOSFET is in its SOA during fault conditions. The MIC2587R-2YM provides a circuit breaker function that latches the output MOSFET off if the load current exceeds the current limit threshold for the duration of the programmable timer. The MIC2587R provides a circuit breaker function that automatically attempts to restart power after a load current fault at a low duty cycle to prevent the MOSFET from overheating.  Each device provides either an active-HIGH (-1BM) or an active-LOW  (-2BM) “Power-is-Good” signal to indicate that the output load voltage is within tolerance.

Key Features:

• MIC2587: Pin-for-pin functional equivalent to the LT1641.
• Operates from +10 V to +80 V with 100 V ABS MAX operation.
• Industrial temperature specifications at VCC = +24 V and VCC = +48 V.
• 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.
• +12 V/+24 V/+48 V Distributed Power Systems.
• +24 V/+48 V Industrial/Alarm Systems.
• Telecom Systems.
• Medical systems.