onsemi

KA7809ETU

KA7809ETU Description

The KA7809ETU is a linear voltage regulator designed for power management applications, manufactured by onsemi. This IC features a fixed output voltage of 9V and is capable of delivering a maximum output current of 1A. It is housed in a TO220-3 package, making it suitable for through-hole mounting. The KA7809ETU is designed to operate with an input voltage range up to 35V, ensuring compatibility with a variety of power sources.

The regulator boasts a low dropout voltage of 2V at 1A (typical), which enhances its efficiency, especially in applications where the input voltage is close to the output voltage. This feature minimizes power dissipation and improves overall system performance. The KA7809ETU also features a quiescent current of 8 mA, contributing to its energy-efficient operation.

In terms of performance, the KA7809ETU offers a high power supply rejection ratio (PSRR) of 71dB at 120Hz, which helps in filtering out noise from the input power supply, ensuring a stable and clean output voltage. The device is equipped with over-temperature and short-circuit protection features, safeguarding it against potential damage during operation.

Despite its obsolescence status, the KA7809ETU remains a reliable choice for applications requiring a robust and efficient power management solution. Its REACH unaffected status ensures compliance with environmental regulations, and its moisture sensitivity level (MSL) of 1 (unlimited) makes it suitable for a wide range of manufacturing environments.

KA7809ETU Features

• Fixed Output Voltage: 9V, providing a stable and consistent power supply.
• Maximum Output Current: 1A, suitable for a variety of low to medium power applications.
• Input Voltage Range: Up to 35V, offering flexibility in power source selection.
• Low Dropout Voltage: 2V at 1A (typical), enhancing efficiency and reducing power loss.
• Quiescent Current: 8 mA, ensuring energy-efficient operation.
• High PSRR: 71dB at 120Hz, providing excellent noise filtering.
• Protection Features: Over-temperature and short-circuit protection, ensuring reliable operation.
• Package Type: TO220-3, through-hole mounting, suitable for various PCB designs.
• Compliance: REACH unaffected, ensuring environmental compliance.
• Moisture Sensitivity Level: MSL 1 (unlimited), suitable for diverse manufacturing conditions.

KA7809ETU Applications

The KA7809ETU is ideal for a range of applications where a stable and efficient power supply is required. Its fixed 9V output and 1A current capability make it suitable for powering analog circuits, sensors, and small electronic devices. The low dropout voltage and high PSRR ensure minimal noise and stable performance, making it an excellent choice for precision applications.

Specific use cases include:

• Analog Circuits: Providing a clean and stable power supply for sensitive analog components.
• Sensor Systems: Ensuring reliable power for sensors that require a precise voltage level.
• Small Electronic Devices: Ideal for powering devices that operate within the 9V and 1A range.
• Industrial Equipment: Suitable for applications where robustness and efficiency are critical.

Conclusion of KA7809ETU

The KA7809ETU is a versatile and reliable linear voltage regulator that offers a combination of performance benefits and unique features. Its fixed 9V output and 1A current capability make it suitable for a variety of applications, while its low dropout voltage and high PSRR ensure efficient and stable operation. The inclusion of over-temperature and short-circuit protection further enhances its reliability.

Despite being marked as obsolete, the KA7809ETU remains a valuable component for engineers and designers seeking a dependable power management solution. Its compliance with environmental regulations and suitability for diverse manufacturing conditions make it a practical choice for a wide range of applications. For those in need of a robust and efficient linear regulator, the KA7809ETU is a worthy consideration.