P-channel load switch for 100 mA rails
The on/off interface is non-inverting, and the switch requires no external Vcc supply — the gate drive is self-biased from the load voltage.
400 mOhm Rds(on) and the voltage drop budget
The typical on-resistance of 400 mOhm sets the conduction loss floor. The P-channel architecture keeps the output slew rate controlled and avoids the inrush spike of an N-channel with a charge pump.
Integrated fault protection simplifies the BOM
Fixed current limiting (non-adjustable, set to the 100 mA maximum), over-temperature shutdown, and under-voltage lockout are all on-chip. No external current-sense resistor, comparator, or supervisor IC is needed. The UVLO threshold is tied to the load voltage — the switch stays off until the input rail rises above the UVLO release point.
The SC-70-5 (SOT-353) package footprint is 2.1 mm × 2.0 mm, suiting space-constrained PCBs. The surface-mount profile is standard for reflow assembly.
The base product number TPS22944 covers the family, and the DCKR suffix identifies the SC-70-5 tape-and-reel variant. For dual-sourcing, the TPS22943 (same package, lower Rds(on) variant) is a pin-compatible alternative within the same family — confirm the output current rating against your load before substituting.