Four-channel I²C load switch with 15 mOhm pass element
The Texas Instruments TPS22993RLWR is a 4-channel, I²C-controlled high-side load switch in a 20-pin WQFN package. Its 15 mOhm typical on-resistance keeps conduction losses low — useful when switching 1.2 A per channel from a 1V to 3.6 V rail.
I²C sequencing and output discharge
Each of the four N-channel switches is addressed and controlled via the I²C interface, allowing software-defined power-up sequencing without extra GPIO pins. The integrated load discharge feature pulls the output to ground when the switch is off, preventing floating rails during shutdown. Slew-rate control limits inrush current, reducing supply droop on the upstream rail.