The LM74502 and LM74502H controller has all the features necessary to implement an efficient and fast reverse polarity protection circuit with load disconnect feature. 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 range of 4 V to 65 V allows protection and control of 12-V and 24-V input supply systems. 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 13 V. LM74502 with its 60-μA peak gate drive strength is suitable for applications that needs inherent inrush current control. LM74502H with its fast gate drive strength of 11-mA peak is suitable for applications which need fast turn-on and turn-off of external MOSFET switch. LM74502 features an adjustable overvoltage protection using the OV pin. with the enable pin low during the standby mode, both the external MOSFETs and controller is off and draws a very low shutdown current of 1 μA.