Diodes' DMP4015SPSQ 40 V P-channel MOSFET is designed to protect automotive electronic control units (ECUs) against the risk of reverse battery connection. ECUs are used in a growing number of automotive control applications and with some vehicles deploying up to 80 ECUs, the need to protect each one demands a simple and cost-effective solution, which this MOSFET provides. Driving this device only requires a minimal number of passive components. By comparison, N-channel MOSFETs require a charge pump to provide the gate drive voltage, adding complexity, cost, and component count. Eliminating the switching topology of a charge pump also avoids issues with EMI emissions.