For applications that require reverse polarity protection, the TPS212x can be configured to protect against mis-wiring input power supplies and block reverse current that could potentially damage the system. By connecting a diode on the GND pin of the TPS212x, this prevents reverse current from flowing back into the device when VIN is below system ground.

Since the TPS212x has an absolute maximum rating of 24 V when referenced to device ground, the GND diode should be rated to standoff voltages up to the maximum reverse voltage. Furthermore, since the control pin voltages (PR1, OV1, OV2, etc.) are in reference to system GND, the voltage thresholds will need to be recalculated based on the voltage drop across the diode. To reduce the voltage drop, a resistor in parallel with the diode can also be used.

Figure 10-19 TPS212x Reverse Polarity Configuration