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.
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