●[MP1584EN]: DC to DC buck converter step-down module with a wide operating range. ●Widely used: for mobile power supply, monitor power supply, buggies, camera power, car power supply, communication equipment, etc. ●Input Voltage: 4.5V to 28V; Output Voltage: 0.8V to 20V; Output Current: Rated Current 3A (Max) ●Output voltage: 3V 5V 9V 12V ●Note: Do not reverse the positive and negative terminals, do not use light load (less than 10% of the output) or without load.