5Pcs 3A XL6009 DC-DC 50KHz Adjustable Step-up Power Converter Module Specification: Wide Input voltage: 3V-30V Output Voltage: 4-35V (Adjustable) Output current: rated current 3A MAX ( Heat-sink Needed) If you need its output power greater than 15W， please add with heat-sink Conversion efficiency: Up to 92% (output voltage higher， the higher the efficiency) Switching Frequency: 50KHz Rectifier: Non-Synchronous Rectification Short circuit protection: current limiting， since the recovery Operating temperature: Industrial grade (-40 \u2103 to +85 \u2103) (output power 10W or less) Full load temperature rise: 40 \u2103 Load regulation: !#!amp!*!plusmn; 0.5% Voltage regulation: !#!amp!*!plusmn; 0.5% Size:47 x 26 x 15 mm Package included: 5 x XL6009 DC-DC 50KHz Adjustable Step-up Power Converter Module