DC-DC Buck Converter Step Down Module LM2596 Power Supply is a step-down(buck) switching regulator, capable of driving a 3-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, and an adjustable output version. 1. Input voltage: 3-40V 2. Output voltage: 1.5-35V(Adjustable) 3. Output current: Rated current is 2A, maximum 3A 4. Switching Frequency: 150KHz 5. Operating temperature:Industrial grade (-40 to +85 ) 6. Conversion efficiency: 92%(highest)