Maxim BU recommends to add the TVS diode between MAX16141 IN pin and IC ground which can prevent the output (OUT) going negative. Since this diode is connected between IN and chip ground, the MAX16141 will only see -0.7V with respect to its ground and all circuitry inside the chip will be off and GATE voltage will be almost 0V. Consequently, the FETs will be open and output (OUT ) will be isolated from the input.