onsemi

LM7809ACT

LM7809ACT Description

The LM7809ACT is a linear voltage regulator designed for applications requiring a stable 9V output voltage with a maximum input voltage of 35V. Manufactured by onsemi, this regulator is part of the Power Management Integrated Circuits (PMIC) category and features a fixed output configuration. The LM7809ACT is housed in a TO-220-3 package, making it suitable for through-hole mounting. Despite being marked as obsolete, it remains a reliable choice for various power management applications due to its robust design and performance characteristics.

LM7809ACT Features

The LM7809ACT offers several key features that make it a valuable component in power management systems:

• Fixed Output Voltage: The regulator provides a stable 9V output, ensuring consistent power supply to connected devices.
• High Input Voltage Range: With a maximum input voltage of 35V, the LM7809ACT can handle a wide range of input sources, enhancing its versatility.
• High Current Capability: The regulator is capable of delivering up to 1A of output current, making it suitable for applications requiring moderate to high current loads.
• Low Dropout Voltage: A typical dropout voltage of 2V at 1A ensures efficient power conversion, even under heavy load conditions.
• Protection Features: The LM7809ACT includes over-temperature and short-circuit protection, safeguarding the regulator and connected circuits from damage.
• Wide Operating Temperature Range: The regulator operates reliably within a temperature range of 0°C to 125°C, making it suitable for industrial and automotive applications.
• Low Quiescent Current: A quiescent current of 8 mA ensures minimal power consumption during standby or low-load conditions.
• High Power Supply Rejection Ratio (PSRR): With a PSRR of 71dB at 120Hz, the regulator effectively filters out noise from the input power supply, ensuring clean output voltage.

LM7809ACT Applications

The LM7809ACT is ideal for a variety of applications where a stable 9V power supply is required. Some specific use cases include:

• Consumer Electronics: Powering devices such as radios, amplifiers, and other audio equipment that require a stable 9V supply.
• Industrial Equipment: Providing reliable power to control systems, sensors, and actuators in industrial environments.
• Automotive Applications: Suitable for powering electronic modules and accessories in vehicles, given its wide operating temperature range and robust design.
• Telecommunications: Ideal for powering communication devices and infrastructure components that require a stable power source.

Conclusion of LM7809ACT

The LM7809ACT is a versatile and reliable linear voltage regulator that offers a stable 9V output with a maximum input voltage of 35V. Its high current capability, low dropout voltage, and protection features make it an excellent choice for a wide range of applications. Despite being marked as obsolete, the LM7809ACT remains a robust solution for power management needs. Its wide operating temperature range and low quiescent current further enhance its suitability for industrial and automotive applications. For engineers and designers seeking a reliable and efficient power management solution, the LM7809ACT is a proven choice.