onsemi

MC79L05ABD

MC79L05ABD Description

The MC79L05ABD is a linear voltage regulator designed to provide a fixed -5V output voltage with a maximum output current of 100mA. Manufactured by onsemi, this regulator is part of the Linear & Switching Voltage Regulators category and is housed in an 8SOIC package. Despite being marked as obsolete, the MC79L05ABD remains a reliable choice for applications requiring a negative voltage output configuration.

MC79L05ABD Features

• Output Type: Fixed at -5V, ensuring stable voltage supply for various electronic circuits.
• Output Current: Capable of delivering up to 100mA, making it suitable for low to medium current applications.
• Number of Regulators: Single regulator design simplifies circuit integration.
• Output Configuration: Negative output voltage, ideal for applications requiring a negative supply rail.
• Voltage Dropout: A maximum dropout voltage of 1.7V at 40mA (typical) ensures efficient operation even under varying load conditions.
• Power Supply Rejection Ratio (PSRR): 49dB at 120Hz, providing excellent noise filtering and stability.
• Protection Features: Over-temperature and short-circuit protection enhance reliability and protect against common failure modes.
• Mounting Type: Surface mount design allows for compact and efficient PCB layouts.
• Moisture Sensitivity Level (MSL): Level 1 (unlimited), making it suitable for a wide range of manufacturing environments.
• Package: Supplied in a tube package, facilitating easy handling and storage.

MC79L05ABD Applications

The MC79L05ABD is well-suited for a variety of applications where a stable -5V supply is required. Some specific use cases include:

• Analog Circuits: Ideal for powering operational amplifiers, analog-to-digital converters (ADCs), and digital-to-analog converters (DACs) that require a negative supply voltage.
• Telecommunications: Used in telecommunication equipment where a negative voltage rail is necessary for biasing and signal processing.
• Industrial Control Systems: Suitable for industrial applications where a stable and reliable negative voltage supply is crucial for the operation of sensors and control circuits.
• Medical Equipment: Can be used in medical devices that require precise voltage regulation and low noise performance.

Conclusion of MC79L05ABD

The MC79L05ABD, despite its obsolete status, remains a robust and reliable linear voltage regulator. Its fixed -5V output, combined with features like low dropout voltage, high PSRR, and comprehensive protection mechanisms, make it an excellent choice for applications requiring a negative voltage supply. The surface mount package and moisture sensitivity level 1 further enhance its versatility and ease of integration into modern electronic designs. While newer alternatives may exist, the MC79L05ABD continues to offer a proven solution for applications where its specific features are required.