LM2679SX-3.3/NOPB

The LM2679SX-3.3/NOPB is a high-efficiency step-down (buck) voltage regulator manufactured by Texas Instruments. It is designed to provide a stable output voltage of 3.3V from a higher input voltage, making it suitable for a variety of applications, including power management in portable devices, automotive systems, and industrial equipment.

Key Features:

1. Output Voltage: The LM2679SX-3.3/NOPB specifically outputs a regulated voltage of 3.3V, which is ideal for powering microcontrollers, sensors, and other low-voltage digital circuits.

2. Input Voltage Range: This regulator can accept a wide input voltage range, typically from 8V to 40V, allowing it to be used in various applications where the input voltage may vary significantly.

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

4. Output Current: The LM2679SX-3.3/NOPB can deliver up to 1A of output current, making it suitable for powering a range of devices without the need for additional components.

5. Integrated Features: The regulator includes built-in features such as overcurrent protection, thermal shutdown, and soft-start capabilities, which enhance reliability and ease of use in circuit designs.

6. Package Type: The device is available in a surface-mount package (SOT-223), which is compact and suitable for space-constrained applications. The small footprint allows for efficient PCB layout and design.

7. Operating Temperature Range: The LM2679SX-3.3/NOPB operates over a wide temperature range, typically from -40°C to +125°C, making it suitable for both consumer and industrial environments.

8. Application Areas: Common applications include battery-powered devices, automotive electronics, telecommunications equipment, and any system requiring efficient voltage regulation.

Electrical Characteristics:

• Switching Frequency: The device operates at a fixed switching frequency, which helps in reducing the size of external components such as inductors and capacitors.
• Ripple Voltage: The output ripple voltage is minimized, ensuring a clean power supply for sensitive electronic components.

Design Considerations:

When designing with the LM2679SX-3.3/NOPB, engineers should consider the selection of external components, such as inductors and capacitors, to optimize performance based on the specific application requirements. The datasheet provides detailed guidelines for component selection, layout recommendations, and thermal management strategies.

Conclusion:

The LM2679SX-3.3/NOPB from Texas Instruments is a versatile and efficient voltage regulator that meets the needs of modern electronic designs requiring reliable power management. Its combination of high efficiency, wide input range, and integrated protection features makes it a popular choice among engineers for various applications.