LM2596 DC-DC Step-Down Buck Converter -- Adjustable Output 1.25V to 35V at Up to 3A

The LM2596 Step-Down Buck Converter Module efficiently converts a higher DC input voltage (4V–40V) down to a lower, adjustable DC output voltage (1.25V–35V) at up to 3A. Simply turn the on-board potentiometer to dial in your desired output voltage -- no programming or software required. With up to 92% conversion efficiency and a compact form factor, it's ideal for powering microcontrollers, LED strips, sensors, and a wide range of electronics projects.

🔧 How It Works

1. Connect your DC power source (4V–40V) to the IN+ and IN− pads on the module.
2. Before connecting any load, use a multimeter to measure the voltage at the OUT+ and OUT− pads.
3. Turn the on-board potentiometer with a small screwdriver to adjust the output to your desired voltage.
4. Once the output reads correctly on your multimeter, connect your load to OUT+ and OUT−.
5. The module continuously regulates the output at your set voltage, regardless of minor input or load fluctuations.

⚡ Key Features

• Wide Input Range -- Accepts 4V to 40V DC input from batteries, adapters, or solar panels
• Adjustable Output -- 1.25V to 35V DC via on-board multi-turn potentiometer
• Up to 3A Output Current -- Powers a wide range of loads (2A recommended continuous without heatsink)
• High Efficiency -- Up to 92% conversion efficiency minimizes heat and wasted energy
• 150 kHz Switching Frequency -- Stable output with small filter components
• ±0.5% Load Regulation -- Consistent output voltage under varying loads
• Simple 4-Wire Connection -- IN+, IN−, OUT+, OUT− -- no programming required
• Compact Form Factor -- Small enough to fit into tight project enclosures

📐 Specifications

📦 What's in the Box

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

Multimeter, wires, screwdriver, and power source are not included.

🛒 What You'll Need

• DC power source (4V–40V) -- battery, wall adapter, or solar panel
• Multimeter -- to verify and set the output voltage
• Small screwdriver -- Phillips or flathead, to adjust the potentiometer
• Hook-up wire or jumper wires -- to connect input and output
• Soldering iron -- To solder the hookup wires to the bare pads

🔌 Compatible With

• Arduino (Uno, Mega, Nano, and other boards)
• Raspberry Pi (set output to 5.1V)
• ESP32 / ESP8266 modules
• LED strips (5V or 12V)
• DC motors and fans
• Any DC-powered device requiring 1.25V–35V at up to 3A

🎯 Typical Applications

• Powering microcontrollers from 12V or 24V battery/adapter sources
• Stepping down vehicle or marine power (12V–24V) for low-voltage devices
• Driving LED strips at a precise voltage
• Solar panel voltage regulation
• Battery-powered portable projects
• DIY adjustable bench power supply
• Robotics -- separate regulated voltage rails for logic and motors

⚠️ Important Notes

• Always set and verify the output voltage with a multimeter before connecting your load.
• The output must always be lower than the input. A minimum dropout of approximately 1.5V–2V is required for proper regulation.
• Observe correct polarity -- there is no reverse-polarity protection on this module.
• Do not exceed 40V on the input.
• For sustained loads above 2A or large voltage differentials, add a heatsink to the LM2596 IC and ensure adequate airflow.
• 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.
• As a switching converter, the output has some ripple (≤30 mV typical). For noise-sensitive analog circuits, add additional output filtering.
• In permanent installations, consider securing the potentiometer screw with a small drop of nail polish or thread-lock to prevent vibration drift.

🏪 About Envistia Mall

Envistia Mall is a US-based electronics retailer specializing in development boards, sensors, modules, and components for makers, engineers, and educators. We ship from the United States with fast handling times. Product documentation and technical support are available at our dedicated support site.

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