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LM317 DC-DC Adjustable Step-Down Linear Regulator Module

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Unlike modern switching buck converters (such as the LM2596) that can introduce high-frequency electrical noise, the LM317 uses linear regulation. This means it provides an exceptionally clean, ripple-free voltage output, making it the absolute best choice for powering delicate audio preamplifiers, radio receivers, and precision analog sensors where signal purity is critical.

This pre-assembled breakout board features the industry-standard LM317T chip paired with a precision multi-turn potentiometer. By simply turning the adjustment screw, you can smoothly dial in your exact required output voltage anywhere from 1.25 Volts up to 37 Volts. Capable of delivering up to 1.5 Amps of current, it is an essential, easy-to-use power component for custom DIY electronics, breadboard prototyping, and repairing vintage electronic hardware.

Key Features & Functional Advantages

  • Exceptionally Clean Power: Linear regulation generates virtually zero electrical noise or high-frequency ripple, ensuring pure, stable power for sensitive analog applications.

  • Fully Adjustable Output: The onboard precision potentiometer allows you to dial in the exact voltage required by your components, completely eliminating the need for external resistor networks.

  • Wide Input Tolerance: Safely accepts unregulated DC input voltages ranging from 4.2 Volts all the way up to 40 Volts.

  • Built-in Hardware Safety: The LM317 chip features internal thermal overload protection and short-circuit current limiting, automatically shutting down if it gets too hot to prevent catastrophic failure.

  • Compact Plug-and-Play Design: Comes fully assembled with necessary input and output filtering capacitors, allowing you to instantly drop it into your project without soldering tiny components.

Perfect For

  • Audio Equipment: The absolute standard for providing ultra-clean, noise-free power to custom guitar pedals, preamplifiers, and high-fidelity audio receivers.

  • Analog Sensor Networks: Powering precision temperature or light sensors that would otherwise be disrupted by the switching noise of standard buck converters.

  • Educational Prototyping: An excellent, forgiving power module for students learning how to build and test basic circuits on a solderless breadboard.

  • Variable Speed Fans: Stepping down 12-Volt lines to precisely control the speed and volume of DC cooling fans in custom enclosures.

Technical Specifications

  • Device Type: DC-DC Step-Down Linear Voltage Regulator Module

  • Main Control Chip: LM317T

  • Input Voltage Range: 4.2 Volts to 40.0 Volts DC

  • Adjustable Output Voltage: 1.25 Volts to 37.0 Volts DC

  • Maximum Output Current: 1.5 Amps (Heatsink dependent)

  • Voltage Dropout: ~2.0 to 2.5 Volts (Input must be higher than your desired output)

  • Module Dimensions: Approximately 35mm x 17mm

Ensure your order is placed by 2PM to guarantee next-day delivery! Our commitment to prompt service includes a 24-hour delivery system through our network of carriers, aimed at ensuring your package arrives right on schedule.

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.