SIMPLE SWITCHER power converter with 4.5V-to-65V 0.6A synchronous buck and 25A quiescent current 6-SOT-23 -40 to 150
Texas Instruments
Texas Instruments - LMR51606XDBVR
$0.79
Texas Instruments - LMR51606XFDBVR
Texas Instruments - LMR51606YDBVR