DC-DC adjustable voltage step down module Specifications input voltage: 3 to 40 VDC output voltage: 1.25 to 35 VDC max. output current: 2.5 A chip: LM2596S dimensions: 49 x 26 x 12 mm (1.14 x 1.02 x 0.47 " ) Documents User manual LM2596-D datasheet Schematic