This is aDC-DC Step Down Converter based on XL4005E1.This Buck converter has short circuit protection (up to 8A) and over temperature protection capability.

Specification:
Input Voltage: 4-30V (32V maximum)
Output Voltage: 1.25-30V (adjustable)
Output Current: 0-5A (4.5A recommended)
Output Power: Approx. 75W
Operating Temperature: -40 to 85 degrees
Operating frequency: 180kHz
Dimension: 54 (L) x 23 (W) x 18 (H) mm

Specs: