XL4016 4V-38V to 1.25V-36V 8A DC-DC Step Down Buck Converter Module with Digital Voltmeter

📋 Overview

The XL4016 Step Down Buck Converter Module is a high-efficiency PWM DC/DC power supply that converts a higher DC input voltage down to a lower, adjustable DC output voltage. It accepts 4V to 38V input and provides a continuously adjustable output from 1.25V to 36V at up to 5A continuous (8A peak), with efficiency up to 94%.

A built-in 3-digit LED display shows the output voltage in real time, and a precision 10-turn potentiometer allows fine voltage adjustment. The module also includes built-in thermal shutdown, current limiting, and short-circuit protection — making it a safe, reliable choice for powering everything from microcontrollers and LED strips to USB devices and motors.

This module is ideal for stepping down battery or power supply voltages to the levels required by electronic circuits — for example, converting a 12V car battery to 5V for USB-powered devices, or stepping 24V industrial power down to 3.3V for a microcontroller.

⚠️ Important: This is a buck (step-down) converter only. The input voltage must always be at least ~2V higher than the desired output voltage. It cannot boost a lower voltage to a higher one. Always set the output voltage before connecting a load.

⭐ Key Features & Benefits

• Wide Input Range (4V–38V DC) — Works with a variety of power sources including car batteries (12V), solar panels, laptop adapters, and industrial power supplies.
• Adjustable Output (1.25V–36V DC) — Set your exact output voltage using the onboard 10-turn precision potentiometer for fine, accurate control.
• High Current Capability — Delivers up to 5A continuous and 8A peak output current, supporting loads up to 200W.
• Built-in Digital Voltmeter — A 3-digit LED display shows the output voltage in real time, so you always know what voltage your load is receiving.
• High Efficiency (up to 94%) — Minimizes wasted energy and heat generation compared to linear regulators like the 7805.
• Built-in Protection — Thermal shutdown, current limiting, and short-circuit protection help prevent damage to the module and your connected devices.
• Calibratable Display — A separate trim potentiometer lets you calibrate the voltage display against a known-accurate meter for precise readings.
• Screw Terminal Connections — Easy, secure, solderless connections for both input and output wiring.
• Compact Size — Small enough to fit into most project enclosures at just 64 × 47 × 26 mm.

🎯 Ideal Applications

• Powering Arduino, Raspberry Pi, ESP32, or other microcontrollers from a higher-voltage source
• Converting 12V car battery power to 5V for USB devices (phones, tablets, dashcams)
• Stepping down 24V industrial power to 12V or 5V for control electronics
• Powering LED strips from a higher-voltage battery or power supply
• Solar panel voltage regulation for charging or powering devices
• Bench power supply for electronics prototyping and testing
• Battery-powered projects requiring a stable, adjustable voltage
• Replacing inefficient linear regulators (like the 7805) in high-current applications

📊 Specifications

📦 What's in the Box

• 1× XL4016 Step Down Buck Converter Module with Digital Voltmeter

Note: Input power source, output wiring, and load devices are not included. You will need to supply your own DC power source and appropriately rated wiring.

⚠️ Important Notes

• Step-down only — This module can only reduce voltage. The input voltage must always be at least ~2V higher than the desired output voltage.
• Set voltage before connecting a load — Always adjust the output voltage to the correct level before connecting any device to the output terminals. Connecting a sensitive device to an incorrect voltage can cause permanent damage.
• Observe polarity — Connect IN+ to positive and IN− to negative/ground. Reversing polarity can damage the module.
• Do not exceed 38V input — Input voltages above 38V DC will damage the module.
• DC input only — This module accepts DC input only. Do not connect it to AC mains power.
• Heat management — At sustained currents above 3–4A or with large input-to-output voltage differences, the module will generate significant heat. Ensure adequate airflow or add a fan for high-current applications.
• Multi-turn potentiometer — The voltage adjustment potentiometer has approximately 10 turns of range. If you're at one extreme, you may need to turn it several full revolutions before the voltage begins to change.
• Display accuracy — The built-in voltmeter is approximate. For critical applications, verify the output voltage with a calibrated multimeter and use the trim potentiometer to calibrate the display if needed.

📄 Documentation & Resources

• XL4016 Buck Converter Module User Guide
• All Buck Converter Power Supply Module User Guides

Sold and supported by Envistia Mall. Ships from the USA. For wiring diagrams, setup instructions, and troubleshooting, see the User Guide. The manufacturer and Envistia LLC (dba Envistia Mall) are not responsible for any damages or losses resulting from the use of this product. Always follow proper electrical safety practices when working with electronic components. Specifications are based on manufacturer data and are subject to change without notice.