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MIC2588

Micrel Semiconductor
Part Number MIC2588
Manufacturer Micrel Semiconductor
Description Negative High-Voltage Hot Swap Power Controllers
Published Apr 13, 2007
Detailed Description MIC2588/MIC2594 Micrel MIC2588/MIC2594 Single-Channel, Negative High-Voltage Hot Swap Power Controllers General Descri...
Datasheet PDF File MIC2588 PDF File

MIC2588
MIC2588

Overview
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 components.
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 www.
micrel.
com.
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 (tFLT) • Regulated maximum output current into faults • Programmable inrush current limiting • Fast response to short circuit conditions (< 1µs) • Programmable undervoltage and overvoltage lockouts (MIC2588-xBM) • Programmable UVLO hysteresis (MIC2594-xBM) • Fault reporting: Active-HIGH (-1BM) and Active-LOW (-2BM) Power-Good output signal Applicatio...


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