Reverse Input Protection Gate Drive Output. When VIN is pulled below –1.2V, this pin is clamped internally to VIN with a low resistance switch forcing an external MOSFET between the VIN and VINP pins into cutoff. In normal operation, this pin is charged to roughly VIN + GATEVCC with an internal charge pump to fully enhance the external MOSFET. DG can tolerate negative voltages down to –40V.