MAX6861UK24+T

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Power management integrated circuits (PMICs) are indispensable components in the world of modern electronics, particularly in the production of smartphones, tablets and other portable applications. They provide the power-management functionality necessary to ensure the device consumes and distributes power as efficiently as possible. Supervisors, a subcategory of PMICs, are designed to monitor the power system of a circuit, reporting status and alerting the controller of undershoot and overshoot events. The Max6861UK24+T is one such device.

The MAX6861UK24+T is a single-chip, ultra-low-power supervisor offering dual precision, open-drain outputs for monitoring two independent voltage input levels. It has an operating voltage range of +1.7V to +5.5V and operates on a low-voltage level of 2.45V. The device features an adjustable detection window and a built-in power-on reset (POR) signalling circuit. Furthermore, the IC features a glitch-immune ascending-threshold supervisory circuit and a separate fixed-voltage monitoring circuit. This provides extreme precision for monitoring two independent voltage levels with a 5.2mV total input offset voltage.

The device’s reset output is set to active low when the enabling input is high and the supply voltage surpasses the detection threshold. A falling edge is generated on the reset output when the supply voltage transitions below the detection threshold due to undershoot. The monitoring voltage can be set as either higher or lower than the threshold voltage by adding an external capacitor. A separate reset signal is triggered when the monitoring voltage is higher than the threshold voltage when the enabling signal is low.

The MAX6861UK24+T is designed to minimize the number of components required, including external capacitors, while providing ultra-precision voltage monitoring. Its high accuracy and low power consumption make it suitable for use in a wide range of low-power applications, including portable medical devices, battery-operated safety systems, handheld computers and medical monitoring systems. Furthermore, the device incorporates a built-in logic circuit, enabling pullup/pulldown resistors to be connected to the reset output for a low-cost reset solution.

In conclusion, the MAX6861UK24+T is an ultra-low-power device designed to provide dual-precision voltage monitoring for a range of applications. By providing fast glitch-immune power-on reset and open-drain outputs, the device ensures reliable operation, while minimizing the number of components required. The MAX6861UK24+T is suitable for a range of low-power applications, including medical instruments and battery-operated systems.

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