4.5-V to 18-V input, 3A/2A/2A output, Synchronous triple buck converter 40-VQFN -40 to 125
Texas Instruments
Texas Instruments - TPS65251-1RHAT
$1.00 - $4.95
Texas Instruments - TPS65251-1RHAR
$1.80 - $5.59
Texas Instruments - TPS65251-1 HA