The TPS54478RTET from Texas Instruments is a positive adjustable step-down (buck) switching regulator Integrated Circuit with a 0.6 V reference and 1 output at 4 A, in a 16-WFQFN exposed pad package.
The TPS54478RTER from Texas Instruments is a buck switching regulator Integrated Circuit with a positive adjustable output at 0.6 V and 1 output rated 4 A, in a 16-WFQFN package with exposed pad.