DC-DC Converter Step-Down 5V 3A - Dual USBThis stepdown module integrates the most common 5V charging identification function and is compatible with most mobile phone charging on the market.
The DKE15A-24 is an Isolated DC/DC Converter Module 9-18Vdc, +/-12 V output, 625mA, 15W
PSM-WZ5020L 50V 1000W Adjustable Voltage Regulated Power Supply 5V-24V, 20A DC/DC Buck Converter Step-down Power Module
PSM-161-DP 5A XL4015 DC-DC 4-38V to 1.25-35V Step Down DC-DC buck Converter Module with 3-digit 7-Segment display.