20Pcs 5V To 3.3V DC-DC AMS1117 800MA Step Down Power Supply Buck Module

20Pcs 5V To 3.3V DC-DC AMS1117 800MA Step-Down Power Supply Buck Module Features: Size: 8.6 x 12.33 mm Input voltage: DC 4.2 V - 10 V Output: 3.3 V, 800 mA Note: 1.Boost modules or buck module indicate the operating voltage, Please do not exceed operating voltage, or it will be damaged easily. 2.Boost module output voltage can only be greater than or equal to input voltage, cannot be less than the input voltage. 3.Buck module input voltage must be higher than output voltage of 1.5V or 2V, otherwise it can not output enough power. 4.Automatic Adjustable Boost or Buck module has start voltage and limit working voltage, Please do not exceed them or it will be damaged easily. 5.Cannot reverse polarity or it will be short circuit, or will be born easily. Package included: 20 x Step-down module