Panasonic

AN79L18

AN79L18 Description

The AN79L18 is a linear voltage regulator designed by Panasonic Electronic Components. This device is characterized by its fixed negative output configuration, delivering a stable -18V output voltage with a maximum output current of 100mA. The regulator is housed in a Through Hole package, specifically a 3SSIP, making it suitable for applications requiring robust and reliable mounting. The AN79L18 operates within a temperature range of 0°C to 125°C, ensuring performance stability across a wide range of environmental conditions. It features a quiescent current of 5mA, which is relatively low, contributing to high efficiency and minimal power consumption in standby mode. The regulator also boasts a Power Supply Rejection Ratio (PSRR) of 50dB at 120Hz, effectively filtering out noise from the input power supply and ensuring a clean output voltage. Additionally, the AN79L18 includes over-current and over-temperature protection features, safeguarding the device and connected circuits from potential damage. Despite its Obsolete product status, the AN79L18 remains a viable option for specific applications due to its unique combination of performance characteristics and protection features.

AN79L18 Features

• Fixed Negative Output Configuration: The AN79L18 provides a stable -18V output voltage, ideal for applications requiring a negative supply rail.
• Low Quiescent Current: With a quiescent current of only 5mA, the regulator minimizes power consumption, making it suitable for low-power and battery-operated systems.
• High PSRR: The regulator offers a PSRR of 50dB at 120Hz, effectively reducing noise and ripple from the input power supply, ensuring a clean and stable output voltage.
• Over-Current and Over-Temperature Protection: These protection features enhance the reliability and robustness of the regulator, safeguarding it and connected circuits from potential damage.
• Wide Operating Temperature Range: The AN79L18 operates reliably from 0°C to 125°C, making it suitable for applications in various environmental conditions.
• Through Hole Mounting: The 3SSIP package allows for secure and reliable mounting on printed circuit boards, ensuring mechanical stability and ease of integration.

AN79L18 Applications

The AN79L18 is well-suited for a variety of applications where a stable negative voltage supply is required. Some specific use cases include:

• Analog Circuits: The regulator's high PSRR and low noise characteristics make it ideal for powering sensitive analog circuits, such as operational amplifiers and analog-to-digital converters, where a clean power supply is crucial.
• Battery-Powered Devices: The low quiescent current of 5mA ensures minimal power consumption in standby mode, making the AN79L18 suitable for battery-operated devices where energy efficiency is paramount.
• Industrial Control Systems: The wide operating temperature range and robust protection features make the regulator suitable for industrial applications where reliability and durability are essential.
• Medical Equipment: The stable output voltage and low noise characteristics are beneficial for medical devices that require precise and reliable power supplies.

Conclusion of AN79L18

The AN79L18 linear voltage regulator from Panasonic Electronic Components offers a unique combination of performance benefits and protection features that make it a reliable choice for applications requiring a stable negative voltage supply. Its low quiescent current, high PSRR, and robust protection features ensure efficient operation and reliability. Despite its Obsolete status, the AN79L18 remains a viable option for specific applications, particularly in analog circuits, battery-powered devices, industrial control systems, and medical equipment.