5.3 A electronic fuse for 2.7 V to 18 V rails
The Texas Instruments TPS25942ARVCR is an electronic fuse (eFuse) that replaces a discrete fuse, hot-swap controller, and current-sense resistor in one 20-WFQFN package. It handles a continuous output current of 5.3 A across an input range of 2.7 V to 18 V, covering common 3.3 V, 5 V, 12 V, and 15 V supply rails without external pre-regulation. The ±8% current-limit accuracy sets the guard-band needed to avoid nuisance trips at the minimum load — a ±8% window means a 5.0 A limit can trip as low as 4.6 A or as high as 5.4 A, so the downstream load must stay below the lower bound.
Junction temperature and the exposed-pad thermal path
Without a proper thermal land, the 5.3 A continuous rating derates significantly above 85°C ambient.