The TPIC5421L is a monolithic gate-protected logic-level power DMOS array that consists of four electrically isolated N-channel enhancementmode DMOS transistors, two of which are configured with common source. Each transistor features integrated high-current zener diodes (ZCXa and ZCXb) to prevent gate damage in the event that an overstress condition occurs. These zener diodes also provide up to 4000 V of ESD protection when tested using the human-body model of a 100-pF capacitor in series with a 1.5-k resistor.