MAX800LEUE+

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Power management integrated circuits (PMICs) are essential building blocks within the modern electronic system design chain. Supervisors, in particular, are the devices within PMICs that monitor power supplies and detect deviation from user specified voltages by triggering either faults or power reset. MAX800LEUE+ is one such supervisor manufactured by Maxim Integrated. It is designed for identifying microprocessor (uP) resets or “brownouts”, meaning that it monitors the power supply voltage levels and triggers a reset signal when a preset threshold is exceeded.

The MAX800LEUE+ is a feature rich supervisor with a host of features in excess of an ordinary supervisor. It has an integrated voltage reference that can monitor two independant supplies to trigger either an overtemperature or RESET output. It also has an adjustable reset delay that allows for between 0.25 to 8 seconds before reset, with a user selectable in-rush current limit of up to 20A. A selectable power fail detector disables active-low reset signals and a dedicated pin for low power reset pin is also present. It is packaged in the 9-pin 1.78mm x 2.23mm SOIC package.

The operating temperature range of the MAX800LEUE+ is -40°C to +85°C, making it suitable for use in harsh industrial environments. The maximum input voltage of the supervisor is 16V, allowing it to monitor higher voltages than traditional supervisors. The reset threshold voltage can be set anywhere between 1.0V and 4.8V with a reset threshold accuracy of 8%. The power supply current consumption of the MAX800LEUE+ is under 10μA in shutdown mode.

The working principle of the MAX800LEUE+ is pretty straightforward. The device monitors the supply voltage of two independent supplies and flags any deviation by triggering a reset signal when the pre-set threshold is exceeded. The reset threshold voltage can be set according to the user’s requirements and is adjustable between 1.0V and 4.8V. The integrated voltage reference ensures that the reset signal is triggered accurately even at low supply voltages. The adjustable reset delay allows for plenty of time for an appropriate response to occur prior to triggering a reset signal.

The MAX800LEUE+ supervisor is predominantly used in industrial automation, robotics, aviation, and military applications. It is primarily used for monitoring the power supply voltage levels to ensure that any voltage deviations from a specified threshold are detected quickly to prevent further damage. It is also used for continuously monitoring the temperature or inrush current levels in addition to the supply voltage and providing reset signal accordingly.

In conclusion, the MAX800LEUE+ is a feature packed supervisor which proves suitable for a variety of power monitoring applications. It offers an adjustable reset threshold of up to 4.8V, adjustable reset delay, and plenty of other features at an affordable price point. Moreover, its wide operating temperature range makes it suitable for a variety of environments. Since it is designed for microprocessor resets or “brownouts”, it is perfect for industrial, robotics, aviation and military applications.

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