Mini DC-DC Converter Adjustable Step Down Power Supply Module Specification: Input voltage: 4.5V - 28V Output voltage: 0.8-20V Output current: rated current is 2A， maximum 3A (additional heatsink is required) Conversion efficiency: Highest 96% Output ripple: !#!amp!*!lt;30mV Switching frequency: 1.5MHz heighest， 1MHz typical Work temperature: -45 C !#!amp!*!plusmn;85 C Dimension: 22mm x 17mm x 4mm (L x W x H) Note: This can't be used to step up voltage Package included: 1 x Mini step down module