Its headline spec is a typical on-resistance of 5.3 mOhm, which at the rated 4 A maximum output current translates to a voltage drop of roughly 21 mV and under 85 mW of self-heating – negligible for most power budgets. The load voltage range spans 0.75 V to 3.6 V, covering common core rails (0.8 V, 1.2 V, 1.8 V) and I/O supplies (3.3 V).
Load discharge and slew rate control – sequencing without a sequencer
The TPS22920YZPR integrates a load-discharge feature that pulls the output to ground when the switch is disabled, preventing floating rails during power-down sequencing. The slew-rate-controlled turn-on limits inrush current, which is useful when charging capacitive loads on a power rail without tripping the upstream supply. The switch is controlled by a single On/Off interface with non-inverting input logic, so a logic-high enables the output.