Small footprint, big temperature range
The CSD17483F4T: Key specs: 240 mOhm max on-resistance at 500 mA with an 8 V gate drive, and a gate charge of just 1.3 nC at 4.5 V. That low gate charge means a microcontroller GPIO can switch it directly — no external driver needed for most low-side loads. Input capacitance is 190 pF at 15 V, keeping switching losses low in battery-powered or high-frequency applications.
Where it fits — and where it doesn't
This part is sized for signal-level switching: load switches, DC-DC converter pass elements, battery protection, and small relay or solenoid drivers. The 500 mW power dissipation at ambient temperature limits continuous current in still air — at 1.5 A the die will heat quickly, so thermal management (copper plane, airflow) is assumed. For loads above 500 mA continuous, verify the junction temperature stays under 150°C in your board's thermal environment. The 3-PICOSTAR package has no visible leads — it's a bottom-terminated land-grid array. Solder paste volume and stencil aperture need to match the tiny pad geometry. Reflow profile follows standard lead-free soldering; the ROHS3 compliance confirms no restricted substances above threshold limits.
No direct replacement has been announced — the FemtoFET™ portfolio covers similar voltage/current ratings in the same footprint, but this exact order code is the one to qualify for new designs.