30 V N-channel in a PowerTDFN — load-switch and OR-ing candidate
The IRFHM8326TRPBF: Gate charge is 39 nC at 10 V. Input capacitance is 2496 pF at 10 V drain-source.
Rds(on) is 4.7 mOhm max at 20 A and 10 V. Power dissipation is 2.8 W at 25 °C ambient and 37 W at case temperature. At 4.5 V the on-resistance is higher than at 10 V. Maximum gate-source voltage is ±20 V. Gate threshold voltage is 2.2 V max at 50 µA drain current.
The operating junction temperature range is -55 °C to 150 °C, which covers automotive under-hood and industrial motor-drive environments. The 150 °C rating is the absolute junction limit — the board-level thermal design must keep the junction below that at full load.
