Electronic fuse for 4A rails — what the specs mean
The TPS259570DSGR from Texas Instruments is an electronic fuse — a resettable overcurrent protection IC that replaces a traditional fuse or PTC in a 2.7V to 18V supply rail. It delivers up to 4A continuous output with a ±7.5% accuracy on the current-limit threshold, so the designer can set the trip point within a tight window without oversizing the protection.
Housed in an 8-WFDFN with exposed pad (also listed as 8-WSON 2x2 mm), the part is surface-mount and suited for compact PCB layouts.