LM2576S-3.3V SMD Voltage Regulator ⚡

The LM2576S-3.3V is a high-performance switch-mode power supply (SMPS) buck regulator designed to provide a stable 3.3 V rail with up to 3 A output current. Its wide input range and integrated protections make it a reliable choice for electronics components, modules, and embedded designs using microcontrollers such as Arduino, Raspberry Pi peripherals, ESP32, and STM32.

Key Features ✅

• Fixed 3.3 V output for digital logic and low-voltage systems
• Up to 3 A continuous output current for robust loads
• High efficiency up to 92% compared to linear regulators
• Wide input voltage range: 4.75 V to 40 V
• Built-in protections: thermal shutdown and current limiting 🔒
• SMD (Surface-Mount Device) package for compact PCB layouts

Technical Specifications 📐

• Output Voltage: 3.3 V
• Input Voltage: 4.75 V to 40 V
• Output Current: 3 A (max)
• Efficiency: up to 92%
• Package Type: SMD
• Regulator Type: DC-DC buck (step-down) converter

Typical Applications 🧰

• Microcontroller and SBC projects: powering 3.3 V rails for Arduino, Raspberry Pi peripherals, ESP32, STM32, and sensor modules
• Automotive electronics: stepping down 12 V systems to stable 3.3 V
• Industrial control and factory automation
• Telecommunications and networking equipment
• Consumer electronics and general-purpose embedded systems

Design and Integration Notes 🔧

• This device is a switching buck regulator (not an LDO); follow the datasheet for the required external inductor, Schottky diode, and input/output capacitors to achieve rated performance and low ripple.
• Ensure adequate thermal dissipation (copper pour/heat spreading) at higher loads approaching 3 A.
• Keep switching loops short and use proper grounding to minimize EMI and output ripple—important for sensitive microcontroller and sensor circuits.
• Suitable for powering 3.3 V peripherals and logic; the main Raspberry Pi board requires 5 V input and should not be powered directly from 3.3 V.

What’s Included 📦

• LM2576S-3.3V SMD Voltage Regulator IC

Ideal for engineers and hobbyists building efficient DC-DC converters for Arduino projects, Raspberry Pi accessories, and other electronics components that require a dependable 3.3 V supply.