MIC2588 Datasheet | Micrel Semiconductor

MIC2588/MIC2594 Micrel MIC2588/MIC2594 Single-Channel, Negative High-Voltage Hot Swap Power Controllers General Description The MIC2588 and the MIC2594 are single-channel, negative-voltage hot swap controllers designed to address the need for safe insertion and removal of circuit boards into “live” high-voltage system backplanes, while using very few external ponents. The MIC2588 and the MIC2594 are each available in an 8-pin SOIC package 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 and includes a programmable overcurrent threshold. During an output overload condition, a constantcurrent regulation loop is engaged to ensure that the system power supply maintains regulation. If a fault condition exceeds a built-in 400µs nuisance-trip delay, the MIC2588 and the MIC2594 will latch the circuit breaker’s output off and will remain in the off state until reset by cycling either the UV/OFF pin or the power to the IC. A master Power-Good signal is provided to indicate that the output voltage of the soft-start circuit is within its valid output range. This signal can be used to enable one or more DC-DC converter modules. All support documentation can be found on Micrel’s web site at .micrel.. Features - MIC2588: Pin-for-pin functional equivalent to the LT1640/LT1640A/LT4250 - Provides safe insertion and removal from live - 48V (nominal) backplanes - Operates from - 19V to - 80V - Electronic circuit breaker function - Built-in 400µs “nuisance-trip” delay (t FLT) - Regulated maximum output current into faults - Programmable inrush current limiting - Fast response to short circuit conditions (< 1µs) - Programmable undervoltage and overvoltage lockouts (MIC2588-x BM) - Programmable UVLO hysteresis (MIC2594-x BM) - Fault reporting: Active-HIGH (-1BM) and Active-LOW (-2BM) Power-Good output signal Applicatio...