AN79L18

The AN79L18 is a linear voltage regulator, part of the PMIC family of voltage regulators. It is a low-dropout linear voltage regulator typically used in high current, low voltage applications and is available in a canned TO-220 package. The AN79L18 is most suitable for applications that require a low quiescent current, low noise, and fast transient response. This makes the AN79L18 an ideal choice for low voltage applications such as portable battery-operated systems and digital audio/video devices.

The AN79L18 is regulated by an internal voltage reference. It uses a standard 7-pin TO-220 package, with the input voltage, output voltage and current limit being adjustable by external resistors. The output voltage is regulated to within an accuracy of +-1.5% and the output current is limited to 1.5A. When the output current is greater than the current limit, the regulator will shut down. The device also has an enable pin that can adjust the output voltage and current limit up to five times the normal level.

The AN79L18 also has several built-in protections. It has short-circuit and over-current protection by way of an internal thermal shutdown system. It also includes output current limiting and over-voltage protection up to 6V. Additionally, the device has reverse current protection which prevents a discharged battery from supplying current to the regulator.

In terms of performance, the AN79L18 boasts a high output voltage accuracy and low output voltage ripple of less than 0.8mV. With a standby quiescent current of 0.15mA and a dropout voltage of 0.875V, it offers low quiescent power consumption and excellent power supply performance. Additionally, its wide operating temperature range (-40°C to 85°C) ensures reliable operation even at extreme temperatures.

In conclusion, the AN79L18 is a high-performance, low-dropout voltage regulator. It offers excellent accuracy, low power consumption, and a wide operating temperature range. With its various protection features and adjustable features, it is the perfect choice for demanding applications in the portable, battery-operated and digital audio/video systems.