LM2596 DC-DC Step-Down Power Supply ModuleDescription: DC-DC step-down power moduleName / number LM2596S DC-DC step-down moduleInput voltage 3.2V ~ 40VOutput voltage 1.25V ~ 35VOutput current 3A (max)Conversion efficiency of 92% (maximum)Output ripple <30mVSwitching frequency 65KHzOperating ..