Low-side driver with built-in fault handling
The STMicroelectronics VND5N07-E is a single-channel low-side N-channel power switch from the OMNIFET II and VIPower series. It switches a grounded load up to 3.5 A continuous from a 55 V max supply rail, with a maximum on-resistance of 200 mOhm. The input is a simple on/off logic signal — no external gate drive or charge pump needed. Integrated fault protection covers current limiting, over-temperature, and over-voltage, so it handles lamp inrush, motor stall, or a shorted load without blowing the fuse or the PCB trace. No Vcc supply required; the gate is driven from the logic input itself, which simplifies the BOM by one regulator rail.
Mounting and thermal checklist
Surface-mount to a TO-252 footprint. The tab is the drain — connect it to the load return path with a wide trace or a copper pour.