LM2575T 5V Voltage Regulator ⚡

The LM2575T 5V Voltage Regulator is a monolithic, high-efficiency DC-DC step-down (buck) switching regulator capable of delivering up to 1 A with excellent line and load regulation. Designed to minimize external parts, it simplifies robust power supply designs for Arduino, Raspberry Pi accessories, and a wide range of electronics modules and microcontroller-based projects.

Key Features ⭐

• Output versions: 3.3 V, 5 V, 12 V, 15 V, and adjustable
• Adjustable output range: 1.23 V to 37 V (±4% max over line and load)
• Minimal external components: requires only 4 parts (typically inductor, Schottky diode, input/output capacitors)
• Fixed-frequency internal oscillator: 52 kHz
• TTL/CMOS-compatible shutdown for low-power standby
• Package options: TO-220 and TO-263 (D2PAK)

Technical Details 🧰

• Output Current: up to 1 A
• Output Voltage (fixed version): 5 V
• Input Voltage Range: 4.75 V to 40 V
• Switching Frequency: 52 kHz (fixed)
• Operating Temperature: −40°C to +125°C
• Package Type (this variant): TO-220

Applications and Use Cases 🛠️

• Simple, high-efficiency step-down (buck) regulators for embedded systems
• Efficient pre-regulator ahead of linear regulators to reduce dissipation
• On-card switching regulators for PCBs and modules
• Inverting buck-boost (positive-to-negative) converter configurations
• Negative step-up converter topologies
• Power supplies for battery chargers, sensors, motors, and Arduino/Raspberry Pi modules

Design Tips 🔧

• Select a Schottky diode and inductor rated above 1 A for reliability and efficiency.
• Use low-ESR input/output capacitors and keep high-current loops short to minimize ripple and EMI.
• Provide adequate heatsinking for the TO-220 package when operating near full load.

Whether you are building compact power supplies for microcontroller projects or robust rails for electronics components, the LM2575T offers a proven, easy-to-use solution with stable voltage regulation across a wide input range.