onsemi

KA7812E

KA7812E Description

The KA7812E is a linear voltage regulator designed by onsemi, featuring a fixed output voltage of 12V and a maximum output current of 1A. This regulator is housed in a Through Hole TO220-3 package, making it suitable for a variety of applications where a stable and reliable power supply is required. The KA7812E has a maximum input voltage of 35V and a dropout voltage of 2V at 1A, ensuring efficient operation even under varying input conditions. It also includes protection features such as over-temperature and short-circuit protection, enhancing its reliability and durability. Despite being marked as obsolete, the KA7812E remains a viable option for legacy systems and applications where its specific characteristics are required.

KA7812E Features

• Fixed Output Voltage: The KA7812E provides a stable 12V output, ideal for applications requiring a consistent power supply.
• High Input Voltage Range: With a maximum input voltage of 35V, this regulator can handle a wide range of input voltages, making it versatile for various power sources.
• Low Dropout Voltage: At 2V (typical) dropout voltage at 1A, the KA7812E ensures efficient power conversion, minimizing power loss and heat generation.
• Protection Features: Over-temperature and short-circuit protection enhance the reliability and safety of the regulator, safeguarding against potential damage.
• Low Quiescent Current: The 8 mA quiescent current ensures minimal power consumption during standby, contributing to overall energy efficiency.
• High PSRR: A Power Supply Rejection Ratio (PSRR) of 71dB at 120Hz helps in filtering out noise from the input power supply, ensuring a clean output voltage.
• Moisture Sensitivity Level: MSL 1 (Unlimited) indicates that the KA7812E is suitable for use in environments with varying humidity levels without requiring special handling.

KA7812E Applications

The KA7812E is well-suited for a variety of applications where a reliable and stable 12V power supply is required. Some specific use cases include:

• Industrial Control Systems: Providing a stable power supply for control boards and sensors.
• Telecommunications Equipment: Ensuring reliable power for communication modules and peripherals.
• Consumer Electronics: Powering devices such as set-top boxes, gaming consoles, and other consumer electronics that require a stable 12V supply.
• Automotive Electronics: Suitable for in-vehicle electronics where a stable power supply is crucial for proper operation.
• Legacy Systems: Ideal for maintaining and upgrading older systems where the KA7812E's specific characteristics are already integrated and required.

Conclusion of KA7812E

The KA7812E, despite being marked as obsolete, remains a robust and reliable linear voltage regulator with a fixed 12V output and a maximum output current of 1A. Its low dropout voltage, high input voltage range, and protection features make it a versatile and efficient choice for a variety of applications. The KA7812E's low quiescent current and high PSRR further enhance its performance, ensuring minimal power loss and a clean output voltage. While newer alternatives may be available, the KA7812E continues to be a reliable option for legacy systems and applications where its specific attributes are essential.