LM2576T-ADJ Adjustable Voltage Regulator

The LM2576T-ADJ is a robust, adjustable step-down (buck) switching regulator designed for efficient DC-DC conversion in electronics components, modules, and custom power supplies. It integrates all active functions to deliver up to 3 A output current with excellent line and load regulation, making it a reliable choice for Arduino, Raspberry Pi, and other microcontroller-based projects where stable voltage rails are essential.

Key Features 🔧

• Adjustable output voltage: 1.23 V to 37 V
• 3 A continuous output current (with appropriate heat sinking)
• 52 kHz fixed-frequency internal oscillator for predictable filtering and reduced EMI complexity
• Superior line and load regulation for stable performance under varying conditions
• Integrated protections: thermal shutdown and current limiting
• TO-220 package for efficient heat dissipation and easy prototyping

Technical Specifications 📐

• Output Voltage: Adjustable 1.23 V to 37 V
• Output Current: 3 A
• Switching Frequency: 52 kHz
• Operating Temperature: -40°C to +125°C
• Package Type: TO-220
• Topology: Step-down (buck); supports inverting (buck‑boost) configuration for negative outputs

Typical Applications 🔋

The LM2576T-ADJ Adjustable Voltage Regulator is suitable for a wide range of power supply designs, including:

• On-card switching regulators for embedded systems and microcontroller boards
• Positive-to-negative converters (inverting buck-boost)
• Negative step-up converters (inverting configurations that provide boosted negative outputs)
• Power supplies for battery chargers, consumer products, power amplifiers, and more
• Custom rails for Arduino shields, Raspberry Pi HATs, sensors, motors, and other electronics modules

Design Notes for Engineers 🧰

• Requires only a few external components: inductor, Schottky rectifier, and input/output capacitors.
• Ensure adequate heat sinking for sustained 3 A loads.
• Follow good layout practices (short high-current loops) to minimize ripple and noise.