5 PCS/LOT Mini Power Supply Module/Car Adapter DC 4.5~24V to 5V 3A
Buck converter - Wikipedia
Pololu 5V, 600mA Step-Down Voltage Regulator D24V6F5
Dc 9v 12v 24v 36v 48v 72v 84v 120v To 5v 3a Step Down Module Power Supply Dc Dc Converter Buck Converter Step Up Converte - Inverters & Converters - AliExpress