AEC-Q101 and 175°C junction — real under-hood margin
The IPB80N06S405ATMA2: AEC-Q101 qualification and a -55°C to 175°C operating junction temperature range confirm this part is released for automotive power-train, engine management, and 48 V board-net applications. The 175°C Tj max is the extended automotive limit — it allows continuous operation in high-ambient engine-bay environments without derating the 80 A current below the application load.
Gate drive budgeting at 81 nC
Total gate charge is 81 nC at a 10 V gate drive. For a typical switching frequency of 20 kHz, the average gate-drive current is 1.6 mA — well within the output capability of standard automotive gate-driver ICs. The 6500 pF input capacitance at 25 V drain bias means the driver must supply a peak current of roughly 1.6 A to achieve a 100 ns rise time; a gate resistor in the 5–10 Ohm range controls ringing without excessive switching loss.
Package and thermal interface
The PG-TO263-3-2 (D²Pak) surface-mount package with an exposed drain tab requires a thermal pad on the PCB — a copper area on the bottom layer keeps the junction-to-ambient thermal resistance low. The 2-lead-plus-tab configuration matches standard automotive ECU footprints; the tab is the drain terminal.