Panasonic

AN79L12

AN79L12 Description

The AN79L12 is a linear regulator IC designed for applications requiring a stable -12V output voltage with a maximum output current of 100mA. Manufactured by Panasonic Electronic Components, this device is housed in a Through Hole package, specifically a 3SSIP, making it suitable for a variety of electronic systems. The AN79L12 operates within a temperature range of 0°C to 125°C, ensuring reliable performance in diverse environmental conditions. It features a quiescent current of 5mA, which is crucial for maintaining efficiency in low-power applications. The regulator boasts a Power Supply Rejection Ratio (PSRR) of 52dB at 120Hz, effectively filtering out noise from the input power supply to maintain a clean output voltage.

AN79L12 Features

• Fixed Output Voltage: The AN79L12 provides a fixed -12V output, eliminating the need for external components to set the output voltage, simplifying design and reducing component count.
• High PSRR: With a PSRR of 52dB at 120Hz, the AN79L12 effectively minimizes the impact of input voltage variations and noise, ensuring a stable and clean output voltage.
• Low Quiescent Current: The 5mA quiescent current ensures high efficiency, making the AN79L12 suitable for applications where power consumption is a critical factor.
• Over Current and Over Temperature Protection: These protection features safeguard the regulator and connected components from damage due to excessive current or temperature, enhancing reliability and longevity.
• Negative Output Configuration: The negative output configuration is ideal for applications requiring a negative voltage supply, such as in certain analog circuits and power supplies.
• Through Hole Mounting: The Through Hole package type facilitates easy integration into printed circuit boards (PCBs) and ensures robust mechanical stability.
• Moisture Sensitivity Level (MSL) 1: The MSL rating of 1 indicates that the AN79L12 is not moisture-sensitive, allowing for unlimited exposure to ambient conditions without the need for special handling or storage precautions.

AN79L12 Applications

The AN79L12 is well-suited for a range of applications where a stable -12V output is required. Some specific use cases include:

• Analog Circuits: The high PSRR and stable output voltage make the AN79L12 ideal for powering sensitive analog circuits, such as operational amplifiers and analog-to-digital converters (ADCs), where noise and voltage stability are critical.
• Power Supplies: The regulator can be used in power supply designs for laboratory equipment, test and measurement devices, and other electronic systems requiring a reliable negative voltage source.
• Industrial Control Systems: The wide operating temperature range and robust protection features make the AN79L12 suitable for industrial applications where reliability and durability are paramount.
• Telecommunications: The low quiescent current and efficient power management capabilities make the AN79L12 a good fit for telecommunications equipment, where energy efficiency and stable power supply are essential.

Conclusion of AN79L12

The AN79L12 linear regulator from Panasonic offers a reliable and efficient solution for applications requiring a stable -12V output. Its high PSRR, low quiescent current, and robust protection features make it a standout choice in its category. While the product is now obsolete, its technical specifications and performance benefits continue to make it a valuable component for legacy systems and applications where its unique features are required. For engineers and designers seeking a dependable negative voltage regulator, the AN79L12 remains a viable option, especially in applications where its specific attributes are critical to system performance.