● LM2577S + LM2596S dual chip
● Output voltage (1.25V-26V arbitrary value) is independent of the input voltage (input 3.5V-28V arbitrary value)， automatically step-up / down
● Step-up mode(boost): Input: 3.5-28V， output: 1.25V-26V
● Output voltage is independent of the input voltage (input 3.5V-28V arbitrary value output 1.25V-26V any value)
● Step-down mode(buck): Maximum current input / output: 3A