XL4015 DC-DC 4-38V to 1.25-35V Buck power supply module 5A Step Down adjustable power module LED Lithium Charger with Heat Sink Specification: Input voltage range: 4~38VDC (Note: Input Voltage Do not exceed 38V). Output voltage range: 1.25- 35VDC adjustable. Output Current: 0-5A, recommended to use within 4.5a. Output power: 75W. Working temperature: -40~+85 degree. Operating frequency: 180KHz. Efficiency: 96% (max). Short circuit protection: Yes (current limit 8A). Protection against temperature. 5A high power, high efficiency and low ripple with power indicator!