STMicroelectronics

L7809CV

L7809CV Description

The L7809CV is a fixed linear voltage regulator designed and manufactured by STMicroelectronics. This device is part of the Linear & Switching Voltage Regulators category and is known for its reliable performance and high-quality output. With an output type of fixed, it provides a stable 9V output voltage and can handle an output current of up to 1.5A. The L7809CV is a single-output regulator with a positive output configuration, making it suitable for a wide range of applications.

L7809CV Features

• Voltage Regulation: The L7809CV offers a fixed output voltage of 9V, ensuring consistent and reliable power supply to connected devices.
• High Output Current: Capable of delivering up to 1.5A of output current, this regulator is suitable for applications requiring higher power demands.
• Over Temperature and Short Circuit Protection: The L7809CV is equipped with built-in protection features to safeguard against potential damage from over-temperature and short-circuit conditions.
• Low Quiescent Current: With a quiescent current of only 8mA, the L7809CV minimizes power consumption in standby mode, making it energy-efficient.
• High PSRR: The L7809CV boasts a power supply rejection ratio (PSRR) of 55dB at 120Hz, ensuring minimal noise coupling from the input to the output.
• RoHS Compliance: This regulator is compliant with the RoHS3 directive, making it an environmentally friendly choice for electronic designs.

L7809CV Applications

The L7809CV is ideal for various applications where a stable and reliable 9V power supply is required. Some specific use cases include:

• Power Supplies: In linear power supplies, the L7809CV can be used to provide a stable 9V output for powering electronic devices.
• Industrial Equipment: This regulator can be utilized in industrial control systems and instrumentation where a reliable power source is crucial.
• Automotive Electronics: The L7809CV can be employed in automotive electronics, such as infotainment systems and sensor applications, to ensure a stable power supply.
• Telecommunications: In telecommunications equipment, this regulator can be used to provide a stable power supply to various components, ensuring optimal performance.

Conclusion of L7809CV

The L7809CV is a robust and reliable linear voltage regulator that offers a fixed 9V output with a maximum output current of 1.5A. Its unique features, such as over-temperature and short-circuit protection, low quiescent current, and high PSRR, make it an excellent choice for a wide range of applications. Although the product is now considered obsolete, it remains a popular choice for its performance benefits and suitability in various electronic designs.