DC-DC 2.5A Buck Step-down Power Supply Module 11-100V to 5V 12V Fixed Output High-efficiency DC Volt Buck Converter for Arduino

Features:1. Ultra-wide input range of 11–100 V, compatible with most power supply systems2. Peak output current of 2.5 A, delivering robust load-handling capability3. Selectable 5 V or 12 V output to meet the requirements of different devices4. Utilises high-frequency capacitors combined with large inductors for low ripple and high efficiency5. Built-in over-temperature protection and output short-circuit protection, suitable for harsh environments6. Primarily used for high-voltage step-down, battery power supply, industrial/automotive electronics, and fast charging applicationsSpecifications:Input voltage: DC 11–100V (maximum input 100V)Output current: 2.5A peakQuiescent current: 1–7mAConversion efficiency: Up to 92%Switching frequency: 140kHzOperating temperature: -40°C to +85°COutput includes TVS and fuseModule Interfaces:IN+: DC input positive terminal 11V–100V (must be at least 6V higher than the output)GND: DC input and output negative terminal; input and output negative terminals are connectedOUT+: DC output positive terminalEN: Step-down enable; default is floating (on); pull down to below 1V to turn off; 2.4–6V enables step-downImportant Notes:1. The input voltage must exceed the output voltage; a voltage difference of at least 6V is recommended (where a rated voltage is specified, follow the actual rating). Do not reverse the polarity of the input, as this will damage the board.2. It is advisable to disconnect the power supply when wiring; otherwise, sparks may occur at high voltages, posing a risk of damaging or destroying the chip. Input capacitors may blow if the polarity is reversed.3. Do not use excessively thin wiring; ensure the wires can handle the corresponding current.4. Do not use with inductive loads, such as motors and relays (devices with coils). If connecting to inductive loads, implement appropriate protection to prevent excessive back-EMF exceeding the chip’s tolerance.5. The higher the power drawn by the module and the closer the current is to the maximum current rating, the greater the heat generation. Ensure adequate heat dissipation during use.6. Without external cooling, continuous current usage is recommended to remain below 2A. Current exceeding 2A requires additional cooling; otherwise, the output will trigger thermal protection.7. The operating voltage is recommended to remain below 100V. If the supply voltage is unstable, voltage spikes exceeding 100V will trigger the chip’s internal overvoltage protection. To ensure stable operation, allow for an appropriate margin.Package list:DC-DC Step-Down Module *1