Reverse polarity faults occur during installation and maintenance of the end equipments. The TPS4810-Q1 and TPS1210-Q1 devices have integrated reverse polarity protection to protect the device from failing during input and output reverse polarity faults. Back to back FETs are turned OFF in such events to protect the load and the battery. The device is tolerant to reverse polarity voltages down to -65V both on input and on the output. On the output side, the device can see transient negative voltages during regular operation due to output cable harness inductance kickbacks when the switches are turned OFF. In such systems the output negative voltage level can be limited within -65V by external clamps such as a TVS or a diode.