LM2596 3A DC-DC Adjustable Step-Down Power Supply Module (Buck Converter)

When your electronics project requires a specific lower voltage from a higher-voltage battery or power brick such as powering a 5-Volt Arduino from a 12-Volt car battery, or running 3.3-Volt sensors from a 9-Volt supply standard linear regulators often waste massive amounts of energy as pure heat. The LM2596 step-down (buck) converter module is the ultimate solution. By utilizing 150 kHz high-frequency switching technology, it efficiently drops higher input voltages down to a stable, continuous output while generating a fraction of the heat of older, traditional regulators.

What makes this fully assembled breakout board incredibly popular is its onboard, multi-turn precision potentiometer. By simply turning the small brass screw with a flathead screwdriver, you can easily and precisely dial in your exact required output voltage anywhere from 1.25 Volts up to 35 Volts. Capable of comfortably delivering a continuous 2 Amps (and up to 3 Amps with a heatsink), it is an absolute essential component for custom DIY power supplies, robotics, and battery-powered electronics.

Key Features & Functional Advantages

• Fully Adjustable Output: The onboard 25-turn precision trimpot gives you absolute, granular control over your output voltage, ensuring your sensitive logic chips receive the exact power they require.

• Wide Input Range: Readily accepts input voltages from 4 Volts all the way up to 40 Volts DC, making it highly compatible with everything from standard USB wall adapters to large 24-Volt industrial power rails.

• High-Efficiency Switching: Operates at a rapid 150 kHz frequency, allowing the circuit to run at up to 92 percent efficiency, which drastically extends your battery life and minimizes thermal waste.

• High Current Capacity: Can continuously deliver up to 2 Amps of current right out of the box, and up to 3 Amps if you attach a small aluminum heatsink to the main chip.

• Built-in Hardware Safety: Engineered with internal thermal shutdown and current-limiting protections to prevent the module from destroying itself if your circuit accidentally shorts out.

Perfect For

• Microcontroller Power: Safely stepping down 9-Volt or 12-Volt battery packs to provide a rock-solid 5-Volt or 3.3-Volt rail for Arduino and Raspberry Pi boards.

• Battery-Powered Projects: Highly efficient power conversion ensures you get the absolute maximum run-time out of your lithium or lead-acid batteries.

• Custom Bench Power Supplies: Acting as the variable-voltage core of a DIY laboratory power supply for testing various electronic components on a breadboard.

• Automotive Electronics: Dropping a car's noisy, fluctuating 12-to-14 Volt alternator system down to a clean, steady voltage for custom dashboard displays and sensors.

Technical Specifications

• Device Type: DC-DC Step-Down (Buck) Switching Converter

• Main Control Chip: LM2596 (or equivalent)

• Input Voltage Range: 4.0 Volts to 40.0 Volts DC

• Adjustable Output Voltage: 1.25 Volts to 35.0 Volts DC

• Maximum Output Current: 2.0 Amps continuous (3.0 Amps maximum with an added heatsink)

• Switching Frequency: 150 kHz

• Maximum Efficiency: Up to 92 percent

• Module Dimensions: Approximately 43mm x 21mm x 14mm

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Please note, a delivery fee of €4.99 applies for orders under €50. For those in remote areas, be aware that our couriers may apply an extra surcharge. This additional fee helps cover the costs of transporting your items to harder-to-reach locations.