Power switch with integrated protection for USB and general-purpose loads
The TPS65281RGVT: It supports a load voltage range of 4.5V to 18V and delivers up to 2.7A continuous output current, making it suitable for powering USB ports, peripheral devices, and downstream system rails. The typical 90mOhm Rds(on) at 5V input keeps conduction losses low — at 2.7A the I²R dissipation is about 0.66W, which the 16-VQFN Exposed Pad package (4x4mm) must sink through the thermal pad to the PCB ground plane.
Fault protection and status reporting for robust system design
The TPS65281RGVT integrates adjustable current limiting, over-temperature shutdown, and undervoltage lockout (UVLO). The current limit is set with an external resistor — the threshold is adjustable, so the same PCB layout can serve different load budgets by changing one component value. The status flag output (open-drain, active low) asserts during over-current or over-temperature events, giving the system controller a real-time fault signal without polling. Slew rate control is built in — the switch turns on gradually, limiting inrush current into capacitive loads. This matters for USB ports where a hot-plugged device can present a large bypass capacitance; a hard turn-on would trip the upstream supply or cause a voltage droop on the 5V rail.
Active lifecycle and compliance for production planning
The base product number TPS65281 covers the family; the RGVT suffix specifies the 16-VQFN package and the tape-and-reel or cut-tape delivery format.