MIC2594

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 constant-current 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.

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
Parameter
Parameter Name Value Value
Product type High Voltage (>16V) High Voltage (>16V)
Latch off Yes Yes
# of PWRGD 1 Active High 1 Active High
Θja (C/W) 152 152
Documents
MIC2588/MIC2594-Single-Channel, Negative High-Voltage Hot Swap Power ControllersData Sheets11/05/20151079KB
Micrel AN 108 - Universal Serial Bus Power ManagementAppNote10/02/2015125KB
Micrel AN 21 - Dual Current-Limiting Switch for USB ApplicationsAppNote10/01/201536KB
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RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC2594-2YM-TR0.0750000.2500008SOIC3.90mm(.150in)NiPdAue4
MIC2594-2YM0.0750000.1632658SOIC3.90mm(.150in)NiPdAue4
MIC2594-1YM-TR0.0750000.2500008SOIC3.90mm(.150in)NiPdAue4
MIC2594-1YM0.0750000.1632658SOIC3.90mm(.150in)NiPdAue4
MIC2588/MIC2594-Single-Channel, Negative High-Voltage Hot Swap Power Controllers MIC2594
Micrel AN 108 MIC2595
Micrel AN 21 MIC2595