The DC/DC buck module applications the input voltage is higher than the output voltage of the buck field, such as battery, power transformer, DIY adjustable regulated power supply, LCD Monitor and LCD TV，portable instrument power supply，telecom/networking equipment,24V vehicle notebook power supply,industrial equipment buck. 12V buck to 3.3V, 12V buck to 5V,  24V buck to 5V,24V buck to 12V,  36V buck to 24V etc. package include : 1x XL4015 5A DC Category: Power Module