Microchip | MIC2587R-1YM

The MIC2587R-1YM 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 MIC2587 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.