On-resistance and gate drive — sizing the conduction loss
Maximum on-resistance is 420 mOhm at 3.4 A drain current with a 10 V gate drive. That 10 V drive voltage is the nominal for achieving the rated Rds(on); the part's gate threshold is 4.5 V maximum at 345 µA, so a 10 V rail is the practical choice for a saturated switch. At 8.7 A the conduction loss is I²R — roughly 32 W at the maximum Rds(on) — which sits inside the 83.3 W package power limit at case temperature, but the designer should derate for ambient and switching losses.
For an ECU or a DC-DC converter in a hybrid powertrain, this is the qualification that matters.
The PG-TO252-3 (DPAK) package has two leads plus a tab that is the drain connection. The supplier device package code is PG-TO252-3 — the Infineon variant of the DPAK outline.
