2.5-V to 5.5-V input, 4-A step-down converter with 1% accuracy in 1.5-mm x 1.5-mm QFN 6-VSON-HR -40 to 125
Texas Instruments
Texas Instruments - TPS62827DMQR
$1.00 - $1.11
Texas Instruments - XPS62827DMQT
$1.96
