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 condi
tion 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.

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
♦ Fully Specified from -40°C to +125°C