APX803L-41SA-7

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PMIC (Power Management Integrated Circuit) is a type of integrated circuit that combines multiple power management functions. The most common functions of PMICs include power regulation, power switching, battery charging, and current protection. One type of PMIC that is widely used in various electronic circuits is called "supervisors", containing various safety functions to protect the circuit from damage due to abnormal operation. APX803L-41SA-7 is a supervisor from APXOMATIC, an analog semiconductor manufacturer.

APX803L-41SA-7 is an I²C-controlled, low quiescent current, low drop-out voltage regulating supervisor. It contains a low quiescent current linear regulator, a clock oscillator and a digitally controllable comparator. It is capable of supplying up to 100mA of output current and provides voltage regulation with an accuracy of up to 0.5%. It has an input voltage range of 2.2V to 11V.

The APX803L-41SA-7 is mainly used in industrial applications, such as in solar and lighting control systems, communication systems and metering systems. Its features such as current protection, shutdown and auto-triggered reset make it an ideal solution for these systems. It also provides an adjustable low voltage reset circuit, allowing the user to set the threshold voltage for a safe operating level. The APX803L-41SA-7 also incorporates a high-speed regulator that can provide output ramp up times of less than 50µs, allowing it to be used in high-speed applications.

Working Principle: The voltage supervisor is based on the same concept used in many other voltage regulation circuits; voltage regulation is provided by controlling the amount of current that flows through a resistor. In the case of the APX803L-41SA-7, this is done by using a variable resistor (a digitally controller variable resistor) that is connected in series with the output terminal of the regulator. The variable resistor is used to control the amount of current that is drawn from the output and thereby regulate the voltage. Additionally, a clock oscillator is connected to the variable resistor, allowing it to adjust the resistance at a predetermined rate.

In order to ensure that the voltage stays within the specified range, the APX803L-41SA-7 incorporates a low voltage reset circuit that is used to reset the device when the voltage falls below a certain threshold. This reset circuit is adjustable, allowing the user to set the threshold voltage. The APX803L-41SA-7 also includes a high speed regulator which is capable of providing output ramp up times of less than 50µs, making it useful for high-speed applications. Finally, the APX803L-41SA-7 also provides current protection and shutdown functions.

In summary, the APX803L-41SA-7 is a versatile and reliable supervisor that is commonly used in industrial applications. It incorporates a low quiescent current linear regulator, a clock oscillator and a digitally controllable resistor, allowing it to provide voltage regulation with an accuracy of up to 0.5%. It also provides adjustable low voltage reset, current protection and shutdown functions, making it the perfect solution for solar and lighting control, communication, and metering systems.

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