100V N-channel in a compact TDSON — what it delivers
The Infineon ISC0805NLSATMA1 is an N-channel MOSFET from the OptiMOS™ 5 family, rated for 100 V drain-to-source and a maximum continuous drain current of 13 A at ambient or 71 A when the case is heatsunk. The on-resistance maxes out at 7.8 mOhm with a 10 V gate drive, which keeps conduction losses low in a switching or linear role. The gate charge is 33 nC at 10 V, a figure that tells you the gate-drive energy per cycle and helps size the driver for the switching frequency you plan to run. The part comes in an 8-lead PowerTDFN package (PG-TDSON-8-46), a surface-mount footprint that keeps the board area small while the exposed pad pulls heat into the PCB copper. The junction temperature range spans -55°C to 150°C, so it fits automotive under-hood, industrial motor drives, and outdoor telecom equipment where the ambient runs hot.
Rds(on) and gate charge — what they mean for the switching design
The 7.8 mOhm maximum at 50 A and 10 V is the number to use for worst-case conduction loss calculations in a buck converter, OR-ing diode replacement, or load switch. The drive voltage range is 4.5 V to 10 V, but the full Rds(on) spec is guaranteed at 10 V; if you run a 5 V gate drive, expect a higher on-resistance and factor that into the thermal budget. With 33 nC of gate charge at 10 V, the ISC0805NLSATMA1 is not a high-Qg part — it switches cleanly with a standard gate driver IC. The input capacitance is 2200 pF at 50 V drain bias, which gives a rough idea of the drive current needed to hit a target rise time. For a 100 kHz hard-switched converter, the gate-drive loss stays manageable.
Package and thermal reality
The PG-TDSON-8-46 package is a surface-mount PowerTDFN with an exposed drain pad. The dual current rating — 13 A at ambient (2.5 W max) and 71 A at case temperature (74 W max) — is the practical design split: the 71 A figure assumes you have a good thermal path to a heatsink or a multi-layer board with thermal vias. Without that, the ambient rating is the binding limit.
Lifecycle and sourcing
The ISC0805NLSATMA1 is listed as Active in production with ROHS3 compliance. There is no last-time-buy notice or NRND flag on this part, so it remains a safe choice for new designs and production BOMs. The OptiMOS™ 5 family is Infineon's mainstream 100 V trench technology, widely stocked across the distribution channel.