The TPS25221DRVR: This means the part is still in regular manufacture, and there is no forced obsolescence timeline to work around.
2.5V to 5.5V input — 3.3V and 5V rails covered
The input range spans 2.5V to 5.5V, so this current switch handles both 3.3V and 5V supply rails without external level shifting. For a design running on a 5V bus — say, a USB VBUS or a 5V peripheral power rail — the TPS25221DRVR sits directly on the rail.
2A continuous output — load budget check
Rated for 2A continuous output. That sets the ceiling for the load this switch can carry continuously without thermal shutdown. If your downstream circuitry draws 1.5A peak, the 2A rating gives about 25% headroom — comfortable for most applications. For loads exceeding 2A, a higher-rated part in the TPS25221 family would be needed.
±6% accuracy — current-limit threshold tolerance
The current-limit accuracy is specified at ±6%. That means the actual trip point could be as low as 1.88A or as high as 2.12A on a 2A nominal setting. For overcurrent protection designs, this tolerance band must be factored into the load budget to avoid nuisance trips or insufficient protection.
That covers the full industrial temperature grade and extends into under-hood automotive and outdoor telecom enclosures where ambient temperatures can push 85°C to 105°C. The 125°C ceiling means the part can sit near a hot power supply or motor controller without derating prematurely.
6-WSON (2x2) package — footprint and thermal pad
Supplied in a 6-WSON package with an exposed pad — 2 mm x 2 mm body.