MAX6887AETE+

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PMIC – Supervisors

PMIC (Power Management Integrated Circuit) – supervisors are type of integrated circuits specifically designed for power management. Primarily, supervisors regulate current/power in applications that consume large amount of power, like automotive electronics and industrial equipment. For instance, car makers use PMICs to improve the battery life of cars and ensure the functionality of automotive operational systems; industrial manufacturers use PMICs to regulate the supply current and ensure the correct operation of the whole system. Additionally, they improve system performance, enhance data accuracy and reduce wasted energy, thus saving both time and money.

MAX6887AETE+ application field and working principle

The MAX6887AETE+ is a PMIC supervisor designed by Maxim Integrated which features a wide input supply range of 2.7 V to 5.5 V. It is capable of low-current operation over an extended temperature range (−40 to +125°C), making it suitable for use in automotive, industrial and medical applications. Moreover, it provides an advanced reset function that can be used to immediately capture and identify reset patterns in the system.

The MAX6887AETE+ includes two independent precision voltage monitors, four low-threshold reset inputs, and an optional manual reset pin. The two comparators, Comparator A and Comparator B, are both rail-to-rail input voltage detectors with independent reset outputs. Comparator A, which is designed to monitor higher-voltage rails, features an adjustable, low-threshold voltage trip point of 2.05 V to 4.2 V, while Comparator B is designed to monitor lower-voltage rails with an adjustable low-threshold voltage trip point of 1.3 V to 3.3 V. Both comparators feature a power-on reset delay of 250 ms.

Furthermore, the reset outputs of Comparator A and Comparator B are open-drain, providing a wide range of reset asserts. The MAX6887AETE+ also includes four low-threshold reset inputs, allowing the user to monitor inputs from other components in the system. This flexibility allows the MAX6887AETE+ to reset multiple components in the system, providing improved system reliability. Additionally, the integrated manual reset GPIO pin can be used to reset a wide range of components, such as a watchdog timer.

To improve system performance, the MAX6887AETE+ also includes a non-volatile latch which stores the status of the system by monitoring voltage rails and other inputs. This allows the system to work reliably even when power is lost or interrupted.

Overall, the MAX6887AETE+ is a versatile PMIC supervisor designed to monitor voltage rails and other inputs, reset multiple components, and enables reliable system operation even when power is interrupted. It is suitable for use in a variety of automotive, industrial and medical applications.

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