onsemi

MC7912CD2T

MC7912CD2T Description

The MC7912CD2T is a linear voltage regulator designed by onsemi, offering a fixed output voltage of -12V with a maximum output current of 1A. This regulator is housed in a D2PAK package, making it suitable for surface mount applications. Despite its obsolete status, the MC7912CD2T remains a reliable choice for applications requiring a stable negative voltage supply.

Key specifications include a typical dropout voltage of 1.3V at 1A, ensuring efficient operation even at lower input voltages. The regulator operates within a temperature range of 0°C to 125°C, making it suitable for a wide range of industrial and consumer applications. Additionally, it features a high power supply rejection ratio (PSRR) of 61dB at 120Hz, which helps in maintaining a clean output voltage under varying input conditions.

MC7912CD2T Features

• Fixed Output Voltage: Provides a stable -12V output, ideal for applications requiring a consistent negative voltage supply.
• High Output Current: Capable of delivering up to 1A, making it suitable for applications with moderate to high current requirements.
• Low Dropout Voltage: A typical dropout voltage of 1.3V at 1A ensures efficient operation, even when the input voltage is close to the output voltage.
• Wide Operating Temperature Range: Functions reliably from 0°C to 125°C, suitable for both consumer and industrial environments.
• High PSRR: A power supply rejection ratio of 61dB at 120Hz helps in maintaining a clean output voltage, minimizing the impact of input voltage variations.
• Protection Features: Includes over-current and over-temperature protection, enhancing the reliability and longevity of the regulator.
• Surface Mount Compatibility: The D2PAK package is designed for surface mount applications, facilitating easy integration into modern PCB designs.

MC7912CD2T Applications

The MC7912CD2T is ideal for a variety of applications that require a stable negative voltage supply. Some specific use cases include:

• Power Supply Design: Provides a reliable negative voltage rail for power supply units in consumer electronics and industrial equipment.
• Audio Equipment: Ensures clean power supply for audio amplifiers and other sensitive audio circuits, thanks to its high PSRR.
• Telecommunications: Suitable for powering various components in telecommunication equipment that require a stable -12V supply.
• Medical Devices: Can be used in medical equipment where a stable and reliable power supply is crucial for accurate operation.

Conclusion of MC7912CD2T

The MC7912CD2T, despite being marked as obsolete, remains a robust and reliable choice for applications requiring a stable -12V output. Its low dropout voltage, high PSRR, and protection features make it a standout option among similar linear regulators. While newer alternatives may offer additional features, the MC7912CD2T's proven performance and compatibility with existing designs ensure it continues to be a valuable component in the electronics industry.