LM2574M-5.0/NOPB

The LM2574M-5.0/NOPB is a step-down (buck) voltage regulator manufactured by Texas Instruments. It is designed to provide a stable output voltage of 5.0V with a maximum output current of 1A. This device is particularly useful in applications where efficient power conversion is required, such as in battery-powered devices, power supplies, and various electronic circuits.

Key Features:

1. Output Voltage: The LM2574M-5.0/NOPB has a fixed output voltage of 5.0V, making it suitable for powering microcontrollers, sensors, and other 5V logic devices.

2. Input Voltage Range: The regulator can accept a wide input voltage range, typically from 7V to 40V, allowing it to be used in various applications with different power supply voltages.

3. Efficiency: The device is designed for high efficiency, often exceeding 80% under typical load conditions. This efficiency helps to minimize heat generation and prolong battery life in portable applications.

4. Switching Frequency: The LM2574 operates at a fixed switching frequency of 52 kHz, which helps to reduce the size of external components such as inductors and capacitors.

5. Thermal Protection: The regulator includes thermal shutdown protection, which prevents damage due to overheating by shutting down the device if the junction temperature exceeds a certain threshold.

6. Current Limiting: It features current limiting to protect against overcurrent conditions, ensuring safe operation under various load scenarios.

7. Package Type: The LM2574M-5.0/NOPB is available in a surface-mount package (TO-220), which facilitates easy integration into compact circuit designs.

8. Application Areas: This voltage regulator is commonly used in applications such as:

   • Power supplies for microcontrollers and digital circuits
   • Battery chargers
   • Automotive electronics
   • Industrial control systems

Electrical Characteristics:

• Output Current: Up to 1A
• Quiescent Current: Low quiescent current helps in battery-powered applications.
• Ripple Rejection: Good ripple rejection characteristics ensure a clean output voltage.

Design Considerations:

When designing with the LM2574M-5.0/NOPB, it is essential to select appropriate external components, including inductors and capacitors, to optimize performance. The datasheet provides detailed guidelines on component selection, layout considerations, and typical application circuits to help engineers implement this regulator effectively.

Conclusion:

The LM2574M-5.0/NOPB from Texas Instruments is a versatile and efficient voltage regulator that is well-suited for a variety of applications requiring a stable 5V output. Its combination of features, including thermal protection, current limiting, and high efficiency, makes it a reliable choice for both new designs and existing systems.