Ultra-Small Mini DC-DC Step Down Power Supply Module 3A Buck Converter Adjustable 1.8V 2.5V 3.3V 5V 9V 12V for Arduino diy kit    Technical Specifications:    Input Voltage: DC 4.5-24V  Output Voltage Adjustable Range: 0.8-17V; Fixed voltage (1.8V 2.5V 3.3V 5V 9V 12V)  Output Current: 3A (max),actual testing input 12V output 1.5A  Transform Efficiency: 97.5%(max) (6.5V to 5V 0.7A)  Switch Frequency: 500KHz  Output Ripple Wave: 20mV (12V to 5V 3A) 20m band width  Operating Voltage: -40 Celsius~ 85 Celsius  Output Overvoltage Protection: No  Static Current: 0.85mA  Load Adjust Rate: ±1%  Voltage Adjust Rate: ±0.5%  Dynamic Response Speed: 5% 200uS  Output Short Circuit Protection: Yes  Input Transposition Protection: No  Enable Control: Yes  Connecting Type: Soldering  Input Way: Soldering  Output Way: Soldering/pin  Soldering Hole Space: 2.54mm  Size: 20mm x11mm x 5mm/0.79” x 0.43” x 0.20”(L x W x H)       Package includes:   1/5/10 x Mini Voltage Regulator