APX803L20-12SA-7

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Power Management Integrated Circuits (PMIC) are semiconductor devices that are used to manage and regulate the power supply in embedded systems. Power management is often a critical component of system designs and the correct selection of components is of paramount importance in order to ensure a robust and reliable electrical system. PMICs comprise a wide range of products and there is an even wider selection of vendors who offer solutions for different types of applications and requirements. One type of PMIC is known as a supervisor or voltage supervisor, which is designed to provide protection against undesired states in the system.

The APX803L20-12SA-7 is a 3-pin Supervisory IC from the AUPEX company. It is a low quiescent current, low-voltage supervisor, optimized for battery-operated applications. It functions as a voltage monitor, providing a trigger point when the voltage on its input pin drops below the reset threshold and a delay interval before the reset output is fully active. This provides a system with predetermined reset protection when the supply voltage drops below the reset threshold.

The APX803L20-12SA-7 has a wide range of operating voltages, from 1.25V to 6.0V, making it suitable for use in many embedded applications. It is designed to provide stable reset operation over a wide temperature range, making it an ideal choice for mission-critical applications in aggressive environments. The device has a low quiescent current of 0.7uA which helps to reduce power consumption, making it suitable for battery-operated systems. Additionally, the output sink/source current of 5mA allows the IC to drive high voltage LED loads, providing visual indication of power status or system health.

The APX803L20-12SA-7 features an additional manual reset input that allows the user to manually reset the system by toggling the pin to a low state. This is useful for system debugging and for providing a quick way to reset the system in the event of system lockup or hang.

The APX803L20-12SA-7 is capable of providing reset coverage for both rising and falling supply voltages. This is achieved by a hysteresis of 1.5V on the reset threshold; the threshold voltage is triggered at 1.25V on the declining supply voltage and reset is triggered at 2.75V during a rising supply voltage. The device has an output delay of 250ms, after the reset threshold has been crossed, the reset signal remains active until power supply voltage is restored above the release threshold level.

The APX803L20-12SA-7 is best suited to use in industry, automotive and post-production control systems. It can be used in applications such as power supply monitoring, overvoltage/undervoltage protection, power supply sequencing and emergency/recovery systems. It can also be used in systems with multiple power supply rails to provide reset protection for each power rail.

The APX803L20-12SA-7 is a highly reliable and cost-effective solution for voltage monitoring and system-level reset protection in various embedded applications. Its wide range of operating voltages, low quiescent current and output current make it an ideal choice for power management in battery-operated systems. The manual reset input and wide hysteresis of 1.5V ensure reliable operation in aggressive applications, making it an ideal choice for mission-critical applications.

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