AS7808AT-E1

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AS7808AT-E1 application field and working principle

AS7808AT-E1 is a kind of 3-terminal low-dropout linear regulator that belongs to the power management integrated circuit (PMIC), voltage regulator, and linear category. It is designed to provide a cost-effective voltage solution with excellent performance and low energy consumption while also adhering to low noise levels and stability. It is often used in the automotive industry and embedded systems, such as the battery supplies for the central locking systems.

The AS7808AT-E1 has unique features to meet the requirements for automotive applications. It has an input voltage range of 2V to 16V, an output voltage range of 1.4V to 20V, an output current capacity of 1A and an operating temperature range of -40°C to 125°C. All these features make it suitable for a wide range of automotive applications. The device also has excellent thermal performance, low ripple and an open-drain output to drive LEDs.

The AS7808AT-E1 operates in two modes: the linear mode and the Fast-mode. In the linear mode, the voltage drop across the regulator pin is low and its efficiency is excellent. The device is controlled by a feedback signal and uses a current source to compare the feedback voltage to an internal reference voltage. When the regulation voltage drops below the feedback voltage, the device operates in the linear mode. The Fast-mode, on the other hand, is used to reduce the time needed for additional current consumption. In this mode, the voltage drop caused by the regulator is increased and its efficiency is decreased. The advantage of using this mode is that it is activated automatically at power-up and does not require any external components.

The main advantage of the AS7808AT-E1 is its low-dropout performance, which ensures that the regulator remains in regulation even when the input voltage is slightly lower than the output voltage. This results in improved efficiency and stability. The device also features low output voltage variation over temperature and excellent transient response. Its protective features include over-voltage and thermal protection.

In conclusion, the AS7808AT-E1 is an ideal solution for voltage regulation in automotive applications. Its low dropout performance, excellent efficiency, and low noise levels make it suitable for a wide range of applications. Its low output voltage variation over temperature and excellent transient response make it the ideal power solution. The device also features several protective features that ensure operability even in extreme temperatures.

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