Feature:★ All use SANYO solid capacitors, 36u thick circuit boards, high-Q high-power inductors with output LED indicators★ It is recommended to use the current within 2.5A when working for a long time. If it exceeds 2A, you need to add a heat sink (output above 10W)★ Since it is a step-down module, in order to ensure stable output, please keep a minimum voltage difference of 1.5V★ Adjustable potentiometer, the output voltage can be adjusted arbitrarily between 1.25-35V, it is very simple to supply power to many of your devices, easy to charge mobile phones, MP3, MP4, PSP★ Power supply to electronic equipment. When the equipment needs power supply and the corresponding voltage power supply is in hand, this module can easily adjust the voltage to the required voltage and solve the problem★ System working voltage test, when doing projects, you can use this module to debug the working voltage range of various voltage test systems, which is very easy and convenientSpecification: Model/Name: LM2596 DC-DC step-down moduleInput voltage: 3.2V-46V (recommended to use within 40V)Output voltage: 1.25V-35VOutput current: 3A (max)Conversion efficiency: 92% (highest)Output ripple: lt; 30mVSwitching frequency: 65KHzWorking temperature: -45℃- +85℃Size: 43mm * 21mm * 14mm (L*W*H)Wiring port:IN+ input positive IN- input negative! OUT+ output positive OUT- output negative Input voltage range: DC 3.2V to 46V It is recommended to use within 40V! (The input voltage must be more than 1.5V higher than the output voltage. It cannot be boosted) Output voltage range: DC 1.25V to 35V continuously adjustable voltage, the rate (up to 92%), the maximum output current is 3A. Measured 12V input, 5V output current 1A, the load regulation rate is less than 1%Note: This is a step-down module, the input voltage needs to be higher than the output voltage. If the output is less than 2A, you can add a heatsink for a long time. If the output current is greater than 2.5A (or the output power is greater than 10W), please add a heatsink for a long time. Wiring1. Welding, directly welding the power cord to the input (output) port;2. Soldering the pins, which can be inserted into the pins through the leads or inserted into the hole board for use; or directly soldered on the PCB after adding the pinsPrecautions :IN+ input positive IN- input negative! OUT+ output positive OUT- output negative! Note that the input and output cannot be reversed. Reverse ion may burn! After the ion is complete, adjust the voltage reduction counterclockwise, and rotate it for more than ten laps! Packing list:1*DC-DC step-down module