DC-DC Buck Converter XL4015 5A – with Current Limiter

Overview

The DC-DC Buck Converter XL4015 5A with Current Limiter is a high-performance step-down (buck) power module designed to convert higher DC input voltages to stable lower DC outputs. Built around the XL4015 regulator IC, this module delivers excellent efficiency (up to 96%) and reliable current control for battery charging, LED driving, robotics, and general-purpose electronics.

Key Features

• XL4015 regulator IC for stable and efficient step-down conversion
• Adjustable constant voltage (CV) and constant current (CC) operation
• Onboard current limiter to prevent overcurrent damage to the load or module
• Dual potentiometers for easy voltage and current limit adjustment
• LED status indicator for charging/full status
• Protections: overcurrent, short-circuit, and thermal protection
• High efficiency up to 96% — reduces heat and power loss

Specifications

• Module Type: DC-DC Step Down (Buck Converter)
• IC: XL4015
• Input Voltage: 5V to 36V DC
• Output Voltage: 1.25V to 32V DC (adjustable)
• Output Current: Up to 5A (with heatsink); continuous ~4A recommended
• Power Output: Up to 75W
• Efficiency: Up to 96%
• Control Modes: Constant Voltage (CV) and Constant Current (CC)
• Indicators: Charging/Full LED status
• Adjustments: Onboard potentiometers for voltage and current limit

Applications

• Battery charging for Li-ion, LiPo, lead-acid and other rechargeable batteries
• Power supply for Arduino, Raspberry Pi, ESP32 and other microcontrollers (when stepped down appropriately)
• LED drivers requiring current regulation
• Robotics, automation and motor driver projects
• DIY lab power supply modules and bench testing
• Renewable energy systems such as small solar charging setups

How to Use and Setup Tips

• Connect a suitable DC source (5V to 36V) to the input terminals, observing polarity.
• Before connecting sensitive loads, set the output voltage using the voltage potentiometer and measure with a multimeter.
• For battery charging, set the desired charge voltage in CV mode, then set the current limit using the current potentiometer (CC mode) to the appropriate charge current.
• Use a heatsink or adequate airflow when operating near the modules maximum current to maintain safe temperatures.
• Double-check connections and polarities before powering batteries or devices to avoid damage.

Safety and Protections

The module includes multiple safety features to ensure dependable operation: overcurrent protection to prevent damage from excessive load, short-circuit protection, and thermal protection to shut down or throttle the module under high temperature conditions. The built-in current limiter is especially useful when charging batteries or driving LEDs.

Why Choose the XL4015 5A Buck Converter

This XL4015-based buck converter balances high efficiency, adjustable CV/CC control, and robust protections in a compact module. It is an excellent choice for makers, engineers, and hobbyists who need a flexible, reliable step-down converter for medium to high current applications.

Note: Images are for illustration purposes only.