1.8 Automotive High-Side Switches
In automotive applications requiring large MOSFETs, an N-Channel MOSFET with the same RON and BVDSS as a P-channel will be half the size of the P-channel device and, cost-wise, would be a more effective solution.
The floating gate drive of the HT0440 allows a direct interface of a 5.0V microprocessor output to an N-channel MOSFET. An important advantage of using the HT0440 is that isolation is provided between the load, which is usually in a high transient voltage environment, and the low voltage control circuitry.