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MC7809ACT

MC7809ACT Description

The MC7809ACT is a fixed positive linear regulator designed for a wide range of power management applications. Manufactured by onsemi, this IC offers a robust and reliable solution for delivering a stable 9V output at up to 1A of current. The device is housed in a TO220AB package, making it suitable for through-hole mounting. Despite being marked as obsolete, the MC7809ACT remains a viable option for legacy systems and applications where its specific features are required.

Key technical specifications include a maximum input voltage of 35V, a dropout voltage of 2V at 1A (typical), and a quiescent current of 6 mA. The regulator is designed to operate within a temperature range of 0°C to 125°C, ensuring stability and performance in various environmental conditions. Additionally, the MC7809ACT features over-temperature and short-circuit protection, enhancing its reliability and safety.

MC7809ACT Features

• Fixed Output Voltage: The MC7809ACT provides a stable 9V output, making it ideal for applications requiring a consistent power supply.
• High Current Capability: With an output current capacity of 1A, this regulator can support demanding applications that require significant power.
• Low Dropout Voltage: A dropout voltage of 2V at 1A ensures efficient operation even when the input voltage is close to the output voltage.
• Low Quiescent Current: The 6 mA quiescent current minimizes power consumption during standby, contributing to overall system efficiency.
• Wide Operating Temperature Range: The device operates reliably from 0°C to 125°C, making it suitable for both indoor and outdoor applications.
• Protection Features: Over-temperature and short-circuit protection enhance the durability and safety of the regulator.
• Through-Hole Mounting: The TO220AB package is designed for through-hole mounting, providing a secure and stable installation in printed circuit boards.

MC7809ACT Applications

The MC7809ACT is well-suited for a variety of applications where a stable 9V power supply is required. Some specific use cases include:

• Consumer Electronics: Ideal for powering devices such as radios, amplifiers, and other audio equipment that require a stable 9V supply.
• Industrial Control Systems: Suitable for powering sensors, actuators, and other control elements in industrial environments.
• Telecommunications: Can be used in telecommunication equipment where a reliable power supply is crucial for maintaining system integrity.
• Automotive Electronics: The wide operating temperature range and robust design make it suitable for automotive applications, including in-car entertainment systems and electronic control units.

Conclusion of MC7809ACT

The MC7809ACT is a versatile and reliable linear regulator that offers a stable 9V output with a maximum current of 1A. Its low dropout voltage, low quiescent current, and wide operating temperature range make it an excellent choice for a variety of applications. The inclusion of over-temperature and short-circuit protection further enhances its reliability and safety. Despite its obsolete status, the MC7809ACT remains a valuable component for legacy systems and applications where its specific features are essential.