LM2576T-15/NOPB

The LM2576T-15/NOPB is a step-down (buck) voltage regulator manufactured by Texas Instruments. It is designed to provide a stable output voltage of 15V with a maximum output current of 3A. This device is particularly useful in applications where efficient power conversion is required, such as in power supplies for various electronic devices.

Key Features:

1. Output Voltage: The LM2576T-15/NOPB has a fixed output voltage of 15V, making it suitable for powering devices that require this specific voltage level.

2. Current Rating: It can deliver up to 3A of output current, which is sufficient for many applications, including powering microcontrollers, sensors, and other electronic components.

3. Efficiency: The regulator boasts high efficiency, often exceeding 75% under typical load conditions. This efficiency helps to minimize heat generation, reducing the need for extensive heat sinking.

4. Input Voltage Range: The device can accept a wide input voltage range, typically from 4V to 40V, allowing it to be used in various power supply configurations.

5. Thermal Protection: The LM2576T-15/NOPB includes built-in thermal shutdown protection, which prevents damage to the device in case of overheating.

6. Short-Circuit Protection: It features current limiting and short-circuit protection, ensuring that the device operates safely under fault conditions.

7. Package Type: The regulator is available in a TO-220 package, which provides good thermal performance and is easy to mount on a PCB.

8. Switching Frequency: The device operates at a fixed switching frequency of 52 kHz, which helps to reduce the size of external components such as inductors and capacitors.

9. Application Areas: The LM2576T-15/NOPB is commonly used in various applications, including:

   • Power supplies for consumer electronics
   • Battery chargers
   • Automotive applications
   • Industrial equipment
   • Telecommunications

Pin Configuration:

The LM2576T-15/NOPB typically has five pins:

• Input (Vin): The pin where the input voltage is applied.
• Output (Vout): The pin that provides the regulated output voltage.
• Ground (GND): The common ground connection.
• Feedback (FB): Used for voltage feedback in adjustable versions (not applicable for fixed output).
• Switch (SW): The output of the internal switch that connects to the inductor.

Conclusion:

The LM2576T-15/NOPB is a versatile and reliable voltage regulator that is well-suited for a variety of applications requiring efficient power conversion. Its combination of features, including thermal and short-circuit protection, makes it a popular choice among engineers and designers looking for a robust solution for their power management needs.