MAX6702ZKA+

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PMIC Supervisors, such as the MAX6702ZKA+, are general-purpose circuit supervisors with active-low reset signals. This type of PMIC is designed to monitor system voltages and provide a reset signal to microcontroller units (MCUs) or controllers when the voltage levels are not within the pre-determined thresholds. This article will discuss the application field and working principle of the MAX6702ZKA+ PMIC Supervisor.

Application Field

The MAX6702ZKA+ PMIC supervisor is ideal for use in a wide range of microcontroller-based systems, including automotive, industrial process controls, ATE systems, and digital instruments. It is especially well-suited for applications that require high-accuracy voltage monitoring. The supervisor’s low operating current, small physical size, and low-power requirements make it highly suitable for battery-operated systems needing long operating times.

Working Principle

The MAX6702ZKA+ PMIC supervisor is built around a bandgap-reference voltage circuit and a voltage-comparator circuit. The bandgap-reference circuit can be used to monitor the system supply voltage, self-supply voltage, and other voltages (including an externally supplied one). When the voltages are within the tolerance range of the thresholds set by the user, the voltage-comparator circuit signals the reset output of the supervisor.

The reset output remains at its active-low state until the monitored voltages rise above the thresholds set by the user. When the voltage levels rise above the thresholds, the reset output automatically goes to its inactive-high state. This allows the supervisor to “raise the alarm” when the voltage levels are not within the threshold voltages.

The MAX6702ZKA+ PMIC supervisor also includes an independent watchdog timer (WDT) circuit.The WDT circuit can be used to set a predetermined time period for the supervisor to reset the devices in the system. This helps ensure the system does not suffer a malfunction due to devices not being correctly reset. The WDT circuit can also be used to guard against unexpected external effects, such as power surges.

The MAX6702ZKA+ PMIC supervisor is designed to provide a reset output signal to the microcontroller or system when the monitored voltage levels are not within the set thresholds. The supervisor also features independent features such as the WDT circuit in order to guard against any unexpected external effects, as well as its low operating current requirement, small physical size, and low power consumption.

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