Four-channel I²C load switch with 15 mOhm on-resistance
The Texas Instruments TPS22993PRLWT is a 4-channel high-side load switch controlled via an I²C interface, each channel rated for 1.2 A continuous output with a typical on-resistance of 15 mOhm.
Parametric fit for low-voltage rail sequencing
The 15 mOhm typical Rds(on) keeps voltage drop under 18 mV at 1.2 A per channel, which matters when the downstream load runs at 1.0 V or 1.2 V core rails — every millivolt counts. The 1:1 input-to-output ratio means each of the four outputs is independently gated by the I²C bus, not daisy-chained. The I²C interface allows the host to enable or disable each channel individually, read back fault status, and control the slew rate to limit inrush current.