MAX815NESA+

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Power Management IC (PMIC) is an integrated circuit specialized in managing a power supply, commonly based around a microcontroller or a digital signal processor. Its main tasks include the regulation, conversion, distribution and control of the energy supply at the level of one, or in some cases, several integrated circuits. Supervisors are one of such type of PMIC that monitor power, reset and other functions in microprocessors and other digital ICs. MAX815NESA+ is a family of ultra-low power microprocessor Supervisors that monitor power, reset and other functions in microprocessors, microcontrollers and other digital ICs. It offers several advantages such as- low supply current of 1.4 µA, a scalable reset assertion time from 1 ms to 255 ms and an adjustable reset release time from 6 ms to 2.5 s.

The MAX815NESA+ is offered in an 8-pin mini SO-8 package and works with a wide supply voltage of 2.3V to 5.5V. In active operating mode, the supply current of 1.4 µA is significantly reduced ensuring low-power operation in battery powered systems. It has over-temperature and over-voltage detection circuitry with a reset output that is both TTL-and CMOS-compatible. It is perfect for low-power system clocking because of its ability to accurately detect the slightest clock inconsistencies.

The MAX815NESA+ has various applications. Some applications include securely monitoring microprocessors, digital signal processors, and other digital integrated circuits in applications such as controllers, instruments and data-conversion systems. It is used in battery-powered systems for enhanced safety and also for increased efficiency due to its low supply current. It is also employed in healthcare applications as well as CCD-controlled imaging systems.

The working principle of MAX815NESA+ can be summarized as follows- It has a comparator that compares the voltage of monitor input pin with its internal reference voltage. If the voltage of the monitor is higher than the internally-generated voltage, the reset output is asserted. It has a reset timer circuit which detects and releases the reset output after a specific duration of time. The timer’s duration is implemented using an external capacitor, with different time constants for the reset assertion and reset release. There is also a temperature circuit that monitors and initiates the reset output when it surpasses a certain pre-determined temperature threshold.

To summarize, the MAX815NESA+ is an ultra-low power microprocessor supervisor offering high-performance features. It is best suited to be used in low-power systems due to its low supply current, over-temperature and over-voltage detection circuitry and its reset output which is both TTL- and CMOS-compatible. Its various applications include securely monitoring microprocessors, digital signal processors, and other digital integrated circuits in applications such as controllers, instruments and data-conversion systems.

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