LM2576T-ADJ 3A Step-Down Voltage Regulator (Adjustable - TO-220 Package)

When you need to drop a high voltage battery down to a safe level for sensitive microcontrollers, standard linear regulators (like the LM317) often waste massive amounts of energy by burning off the excess voltage as pure heat. The LM2576T-ADJ solves this thermal nightmare by using highly efficient switching buck-converter technology. Instead of burning energy, it rapidly switches the power on and off thousands of times per second, smoothing it out through an external inductor to provide a clean, steady voltage while remaining remarkably cool.

This adjustable version gives you complete control over your power system. By simply choosing the right pair of external resistors, you can dial in exactly the voltage you need anywhere from 1.23 Volts up to 37 Volts. Housed in a rugged, 5-pin TO-220 package, it can deliver a massive 3 Amps of continuous current. Whether you are stepping down a 24-Volt industrial power supply to run 5-Volt logic, or building a custom variable benchtop power supply, the LM2576 provides robust, reliable power delivery.

Key Features & Functional Advantages

• High Efficiency Switching: Operates significantly cooler and wastes far less battery life than traditional linear regulators, especially when the difference between your input and output voltage is large.

• Massive Current Delivery: Comfortably provides up to 3 Amps of continuous output current, making it perfect for driving heavy loads like multiple servo motors or long LED strips.

• Fully Adjustable Output: Gives you the freedom to set any custom output voltage from a low 1.23 Volts all the way up to 37 Volts, allowing one chip to serve multiple different project needs.

• Simplified Circuitry: Designed to be incredibly easy to use, requiring only four common external components (two capacitors, one inductor, and one catch diode) plus your two adjustment resistors.

• Built-in Hardware Safety: Features internal thermal shutdown to protect the silicon from overheating and integrated current limiting to survive short-circuit conditions.

Perfect For

• Custom Power Supplies: The foundational chip for building high-power, adjustable benchtop power supplies for your electronics lab.

• Robotics Power Distribution: Excellent for taking a large 12-Volt or 24-Volt main battery pack and efficiently stepping it down to run sensitive 5-Volt sensors and microcontrollers without overheating.

• Solar Battery Systems: Useful in stepping down fluctuating solar panel voltages to provide steady, usable power for 12-Volt electronics.

• Automotive Electronics: Safely drops a car's noisy 12-to-14 Volt alternator system down to stable, clean logic levels for custom dashboard displays and microcontrollers.

Technical Specifications

• Device Type: Step-Down (Buck) Switching Regulator

• Output Type: Adjustable

• Input Voltage Range: Up to 40 Volts DC Maximum

• Output Voltage Range: 1.23 Volts to 37 Volts DC

• Maximum Output Current: 3 Amps

• Switching Frequency: 52 kHz internal oscillator

• Package Type: 5-Pin TO-220 (Staggered pins with metal heatsink tab)

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