3 mOhm Rds(on) — the conduction loss floor
The BTS500201TADATMA2 is a single-channel high-side power switch from Infineon's Reversave™ series, qualified to AEC-Q100 for automotive deployment. Its headline parametric is a typical on-resistance of 3 mOhm — at 29 A continuous output, the conduction loss is I²R = 2.5 W, which sets the thermal budget for the TO-263-7 (D²Pak) package on a 4-layer board with the exposed pad soldered to a copper plane.
Load voltage and fault protection envelope
The switch operates from an 8 V to 18 V load supply — the 12 V automotive bus with cold-crank and load-dump margins. No separate Vcc supply is required; the gate drive is self-biased from the load rail. Fault protection covers over-temperature, over-voltage, reverse battery, and short-circuit events, which means a single device handles the common electrical abuse scenarios on an automotive power distribution node without external clamp diodes or a secondary protection IC.
Junction temperature and under-hood qualification
The AEC-Q100 qualification covers the reliability stress tests (HTOL, HTSL, TC, ESD) required for tier-one PPAP submission. The input is non-inverting with a simple On/Off interface — a logic-high on the gate pin turns the N-channel FET on.