The LM74502-Q1, LM74502H-Q1 controller has all the features necessary to implement an efficient and fast reverse polarity protection circuit with load disconnect function. This easy to use reverse polarity protection controller is paired with an external back-to-back connected N-channel MOSFETs to replace other reverse polarity schemes such as a P-channel MOSFETs. The wide input supply of 4 V to 65 V allows protection and control of 12-V and 24-V automotive battery powered ECUs. The device can withstand and protect the loads from negative supply voltages down to –65 V. An integrated charge pump drives external back-to-back connected N-channel MOSFETs with gate drive voltage of approximately 12.4 V to realize reverse polarity protection and load disconnect function in case of overvoltage and undervoltage event. LM74502-Q1 with it's typical gate drive strength of 60 μA provides smooth start-up with inherent inrush current control due to its lower gate drive strength. LM74502H-Q1 with it's 11-mA typical peak gate drive strength is suitable for applications which need faster turn on such as load switch applications. LM74502-Q1 features an adjustable overvoltage cutoff protection feature using a programming resistor divider to OV terminal. LM74502-Q1 features enable control. With the enable pin low during the standby mode, both the external MOSFETs and controller is off and draws a very low 1 μA of current.