The Texas Instruments TPS2420RSAT is a single-channel hot swap controller with an integrated power switch, designed to manage inrush current and protect downstream circuitry during board insertion into a live backplane or power rail. It handles supply voltages from 3V to 20V and delivers up to 5A continuous output, making it a fit for 3.3V, 5V, 12V, and 19V rails in telecom, datacom, industrial, and general-purpose systems where you need controlled power-up and fault isolation.
Protection features you can set
This controller gives you programmable fault handling: auto retry, circuit breaker, current limit, fault timeout, and latched fault. That means you can decide whether the part resets itself after an overcurrent event or stays off until you cycle power — useful for different maintenance philosophies. The UVLO (undervoltage lockout) and thermal limit are fixed on-chip, so the part won't try to turn on below the supply threshold or cook itself.
No last-time-buy notice, no end-of-life announcement.