https://www.mcucity.com/product/54/mp1484en-dc-dc-step-down-power-module-3a-adjustable-step-down-module-lm2596-super-mini-version
https://www.ebay.com/itm/2A-DC-DC-Buck-Step-Down-Voltage-Regulator-1-5V-1-8V-3-3V-4-2V-5V-Power-Converter-/322599264816