Step Up LM2587 DC-DC 5A Boost Converter 3V-35V To 4V-40V DC-DC adjustable boost module Input: 3V-35V Output: 4V-40V adjustable Efficiency: 94% (MAX) Module size: L37mm*W32mm*H15mm Working temperature: -40°C-+85°C Load capacity: up to 80W Wiring method: the terminal is free of soldering, IN is input, OUT is output Note: The smaller the voltage difference between the input and output voltages, the greater the load capacity and the higher the efficiency.