The LM74501-Q1 has an integrated VDS clamp feature that turns on an external MOSFET whenever voltage difference between DRIAN and SOURCE exceeds VDS clamp threshold (20 V typical) when enable pin is pulled low. This use case scenario is specially true when the LM74501-Q1 is used to drive inductive loads and overshoot can happen at the DRAIN pin due to regenerative action of the motor load. Also, if the gate discharge timer designed to keep external MOSFET on during an ISO7637-2 pulse 1 event expires within stipulated time window due to component level tolerances, the LM74501-Q1 VDS clamp feature provides second level of protection to keep maximum voltage across FET to 20 V.