15 A load switch with 4.4 mOhm Rds(on) — the conduction loss floor
The TPS22959DNYT is a single-channel, high-side N-channel load switch from Texas Instruments, rated for 15 A continuous output current with a typical on-resistance of 4.4 mOhm. The switch is enabled by a non-inverting On/Off interface and includes load discharge and slew rate control features.
What the 4.4 mOhm Rds(on) and 15 A rating mean for the board
The slew rate control limits inrush current into capacitive loads, which prevents upstream supply droop during power-up sequencing.
Package and rework — 8-WSON with exposed pad
It is reworkable with hot air — the pad size is small enough that a standard hot-air station can lift the part without cooking adjacent components.
The 105°C ceiling covers the hot side of a ventilated enclosure; if the board sits near a heat sink or in a sealed box, the 15 A rating should be derated per the datasheet thermal curves.