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MAX6399 - Protection Switch Controller

Description

The MAX6399 is a small overvoltage and undervoltage protection circuit.

The device can monitor a DC-DC output voltage and quickly disconnect the power source from the DC-DC input load when an overvoltage condition occurs.

Features

  • Wide Supply Voltage Range (5.75V to 72V).
  • Internal Charge Pump Ensures n-Channel MOSFET is Fully Enhanced During Normal Operation (VGS = 10V).
  • Fast GATE Shutoff During Overvoltage with 20mA Sink Capability.
  • Latches Off External n-Channel MOSFET During High-Voltage Transients.
  • Adjustable DC-DC Input Undervoltage Threshold Power-OK Output.
  • Adjustable DC-DC Output Overvoltage Thresholds.
  • Overtemperature Shutdown Protection.
  • Fu.

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Full PDF Text Transcription

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19-3655; Rev 1; 3/06 High-Voltage, Overvoltage/Undervoltage, Protection Switch Controller General Description The MAX6399 is a small overvoltage and undervoltage protection circuit. The device can monitor a DC-DC output voltage and quickly disconnect the power source from the DC-DC input load when an overvoltage condition occurs. A power-OK output signals when the DC-DC input voltage falls below an adjustable threshold. This controller architecture provides the ability to size the external n-channel MOSFET to meet specific load current requirements. When the DC-DC monitored output voltage is below the user-adjustable overvoltage threshold, the GATE output of the MAX6399 goes high to enhance the n-channel MOSFET.
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