LM2587S-ADJ/NOPB PMIC - стабилизаторы напряжения - DC-DC импульсные стабилизаторы от Texas Instruments

The LM2587S-ADJ/NOPB is a versatile step-down (buck) voltage regulator manufactured by Texas Instruments. It is designed to provide a stable output voltage from a higher input voltage, making it suitable for a variety of applications, including power management in portable devices, battery-powered systems, and other electronic circuits requiring efficient voltage regulation.

Key Features:

1. Adjustable Output Voltage: The LM2587S-ADJ/NOPB allows for an adjustable output voltage, which can be set using external resistors. This flexibility makes it suitable for applications requiring specific voltage levels.

2. High Efficiency: The device operates with high efficiency, often exceeding 85%, which helps in reducing heat generation and prolonging battery life in portable applications.

3. Wide Input Voltage Range: It supports a broad input voltage range, typically from 4.5V to 40V, allowing it to be used in various power supply scenarios.

4. Output Current Capability: The LM2587S-ADJ/NOPB can deliver up to 3A of output current, making it suitable for powering a range of devices and circuits.

5. Built-in Protection Features: The regulator includes several protection features such as thermal shutdown, current limiting, and under-voltage lockout, ensuring reliable operation and safeguarding against potential damage.

6. Switching Frequency: The device operates at a fixed switching frequency, which helps in minimizing the size of external components like inductors and capacitors.

7. Package Type: The LM2587S-ADJ/NOPB is available in a surface-mount package (typically an 8-pin SOIC), which facilitates easy integration into compact circuit designs.

8. Application Versatility: It is suitable for a wide range of applications, including but not limited to:

   • Power supplies for microcontrollers and digital signal processors
   • Battery chargers
   • Automotive applications
   • Industrial equipment

Electrical Characteristics:

• Input Voltage Range: 4.5V to 40V
• Output Voltage Range: Adjustable (typically 1.23V to 37V)
• Maximum Output Current: 3A
• Switching Frequency: Typically around 100 kHz
• Efficiency: Up to 90% or more, depending on load conditions

Typical Application Circuit:

In a typical application circuit, the LM2587S-ADJ/NOPB would be connected with external components such as an inductor, input and output capacitors, and feedback resistors to set the desired output voltage. The inductor and capacitors are selected based on the required output current and voltage ripple specifications.

Conclusion:

The LM2587S-ADJ/NOPB from Texas Instruments is a robust and efficient solution for applications requiring adjustable step-down voltage regulation. Its combination of high efficiency, adjustable output, and built-in protection features makes it a popular choice among engineers and designers in various fields.