AEC-Q101 and 150°C junction — built for under-hood
That 150°C ceiling is the real differentiator for engine-bay or transmission-mounted electronics — the part keeps its rated SOA when ambient air hits 105°C and the PCB is radiating heat from nearby power stages.
Gate charge and switching speed — what 1.5 nC means
Total gate charge is 1.5 nC at 10 V, and input capacitance (Ciss) is 290 pF at 100 V. For a 100 kHz hard-switched converter, the gate-drive power is roughly Qg × Vgs × fsw — about 1.5 mW. That is negligible, so the driver IC stays cool and the switching edge is fast enough to keep cross-conduction losses low. The trade-off is the 2.7 Ohm Rds(on): this is not a part for a 10 A boost stage; it is sized for the 0.5 A to 1.5 A auxiliary rail where the 800 V rating buys you headroom against bus transients.
D-Pak (TO-252) — board area and thermal path
Surface-mount D-Pak (TO-252) with the tab as the drain connection. The 42 W power dissipation at case temperature assumes a copper area on the PCB that sinks heat from the tab — a 25 mm × 25 mm pad on a 2 oz copper board is the typical starting point. The tab is electrically live (drain), so the thermal vias must be isolated from ground unless the design uses the drain as the output node.
ROHS3 compliant.