XL4015 5A DC-DC Step-Down Buck Converter Module — Adjustable 1.25V-36V Output, 4V-38V Input

The simplest way to step down a DC voltage, this XL4015 5A Buck Converter Module takes any DC input from 4V to 38V and converts it to a stable, adjustable output from 1.25V to 36V at up to 5A. Just turn the onboard potentiometer to set your voltage, and the module does the rest. With up to 96% conversion efficiency, it runs far cooler and wastes far less energy than linear regulators like the 7805.

No display, no buttons, no menus — just one potentiometer and four solder pads. If you need a clean, reliable voltage rail for your project, this module delivers.

⚡ Why Choose This Module?

• Wide input range: Accepts 4V to 38V DC — works with everything from 9V batteries to 36V industrial supplies.
• Adjustable output: 1.25V to 36V via a single onboard potentiometer. Set it once and it stays locked.
• Up to 5A output: Powers everything from microcontrollers to LED strips to motor drivers (with adequate cooling).
• 96% efficiency: High-frequency switching at 180 KHz means minimal heat and minimal wasted power compared to linear regulators.
• Built-in protection: Thermal shutdown, current limiting, and output short-circuit protection.
• Compact: Just 54mm × 24mm — fits easily inside project enclosures, behind panels, or inline with wiring.
• Dead simple: One potentiometer, four solder pads. No programming, no configuration, no display to learn.

🔧 How It Works

1. Solder input wires to the IN+ and IN− pads. Connect your DC power source (4V–38V).
2. Set the output voltage — turn the potentiometer while measuring the output with a multimeter. Clockwise = higher voltage.
3. Solder output wires to the OUT+ and OUT− pads. Connect your load.
4. Done. The module automatically maintains the set voltage regardless of load changes.

⚠️ Important: Always set the output voltage before connecting your load. The potentiometer may be set to maximum output from the factory — connecting a 5V device without checking could expose it to 36V.

🎯 Perfect For

• Powering Arduino, ESP32, or Raspberry Pi from a 12V, 24V, or battery source
• Car/marine USB charging — step down 12V/24V vehicle power to 5V
• LED strip power — convert 24V to 12V, or 12V to 5V for addressable LEDs
• Sensor power rails — provide 3.3V or 5V from a 12V/24V industrial bus
• Solar panel regulation — stabilize variable panel output to a fixed voltage
• Basic bench power supply — pair with a laptop adapter for adjustable DC output
• Embedded systems — compact enough to build into permanent installations
• Any project that needs a lower DC voltage from a higher DC source

📐 Specifications

• Converter IC: XL4015
• Type: DC-DC Buck (Step-Down)
• Input voltage: 4V – 38V DC
• Output voltage: 1.25V – 36V DC (adjustable via potentiometer)
• Output current: Up to 5A (with heatsink)
• Output power: Up to 75W (with heatsink)
• Minimum dropout: ~1V (input must be ≥1V above output)
• Conversion efficiency: Up to 96%
• Switching frequency: 180 KHz
• Voltage adjustment: Single-turn potentiometer
• Connections: Solder pads (IN+, IN−, OUT+, OUT−)
• Protections: Thermal shutdown, current limiting, output short-circuit
• Reverse polarity protection: None (add external diode if needed)
• Operating temperature: −40°C to +85°C
• Board dimensions: 54mm × 24mm × 18mm (2.1" × 0.9" × 0.7")
• Weight: 16g (0.56 oz)

📦 Package Contents

• 1 × XL4015 5A DC-DC Step-Down Buck Converter Module

DC power supply, wires, heatsink, and multimeter are not included. Soldering iron required for connections (solder pads, not screw terminals).

📊 Need More Features?

If you need constant current (CC) control for battery charging or LED driving, a built-in LED display, USB output, or screw terminal connections, check out our upgraded version:

👉 XL4015 5A CC/CV Step-Down Converter with Volt, Amp & Power Meter →

📄 Documentation & Resources

• User Guide — Wiring, Voltage Adjustment, Power Sizing & Troubleshooting
• All Power Module Guides