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MAX6399 - 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.

Key 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 (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
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.