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