LM2596 1.25V - 35V Step-Down Buck DC-DC Converter Power Supply Module

📋 Overview

The LM2596 Step-Down Buck DC-DC Converter is a compact, adjustable voltage regulator module that efficiently converts a higher DC input voltage down to a lower DC output voltage. Power it with any DC source from 4V to 40V, and use the on-board potentiometer to dial in your desired output voltage anywhere from 1.25V to 35V.

It can deliver up to 3A of continuous current, making it a versatile solution for powering microcontrollers, LED strips, sensors, motors, and a wide range of electronics projects. This is the voltage-control only version — no current limiting and no built-in display.

⚠️ Important: The output voltage must always be set lower than the input voltage. Do not exceed 40V input. Always verify the output voltage with a multimeter before connecting your load.

⭐ Key Features

• Wide Input Range: Accepts 4V to 40V DC input
• Adjustable Output: 1.25V to 35V DC via on-board potentiometer
• Up to 3A Output Current: Suitable for a wide range of loads
• High Efficiency: Up to 92% conversion efficiency reduces heat and wasted energy
• 150 kHz Switching Frequency: Allows use of smaller filter components and provides stable output
• ±0.5% Load Regulation: Maintains consistent output voltage under varying loads
• Compact Size: Small enough to fit into tight project enclosures
• Simple 4-Wire Connection: IN+, IN−, OUT+, OUT− — no programming or software required

📊 Specifications

🎯 Typical Applications

• Powering Arduino, Raspberry Pi, ESP32, and other microcontroller boards from a higher-voltage supply
• Stepping down 12V or 24V vehicle/battery power for 5V or 3.3V devices
• Driving LED strips at a specific voltage
• Solar panel voltage regulation
• Battery-powered portable projects
• Bench power supply projects
• Robotics and motor controller power rails

📦 What's in the Box

• 1 × LM2596 DC-DC Step-Down Buck Converter Module

⚠️ Important Notes

• The output voltage must always be lower than the input voltage. A minimum dropout of approximately 1.5V–2V is required between input and output for proper regulation.
• At higher current draws (above 2A) or large voltage differentials, the regulator IC will generate heat. Consider adding a small heatsink or ensuring adequate airflow for sustained high-current operation.
• Always measure the output voltage with a multimeter before connecting your load, especially after adjusting the potentiometer.
• This module provides voltage regulation only — it does not include current limiting or constant-current functionality.
• This module does not include a built-in voltage/current display.
• Observe correct polarity when wiring. Reverse polarity on the input can damage the module.

📄 Documentation & Resources

• LM2596 DC-DC Buck Converter User Guide
• All Buck Converter Power Supply Module User Guides

Sold and supported by Envistia Mall. Ships from the USA. For wiring diagrams, sample code, 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.