Mini DC DC 12 24V To 5V 3A Step Down Power Supply Module Voltage Buck Converter Adjustable 97.5% 1.8V 2.5V 3.3V 5V 9V 12V|buck converter|converter voltageconverter 5v to 12v - AliExpress
Step-down 6 - 24V in to USB 5V/3A out DC-DC Buck converter – JeVois Smart Machine Vision
97% Efficient DC to DC Buck Converter [3A, Adjustable] : 12 Steps - Instructables