MAX6884ETP+T

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Power management integrated circuits (PMICs) are an essential component in virtually all consumer electronic products, including modern portable devices such as smartphones and tablets. Supervisors, also known as voltage detectors, are an important type of PMICs that are used to protect processors from excessive input supply currents, thereby preventing data loss and other operational errors when the device is being used in environments with varying input supply voltages. The MAX6884ETP+T is a supervisor that is specifically designed to protect mobile smart devices from overvoltage, reverse polarity, and overcurrent conditions.

The MAX6884ETP+T is a single-channel voltage supervisor designed to monitor a single supply voltage input, typically a battery or a system DC/DC regulator output. The device features a high-accuracy input voltage-sensing circuit, an error-flag comparator, a watchdog timer, and a dual-mode reset. The MAX6884ETP+T supports a wide upstream operating range (from 2.9 V to 32 V) and a downstream operating range (from 0.8 V to 28 V), allowing it to be used in a wide range of mobile smart device applications. It is capable of withstanding ±20 V of fault input and provides an industry-leading low voltage detection accuracy of ±250 mV over a temperature range of -40°C to +125°C.

The MAX6884ETP+T is a flexible supervisor device and can be used in a variety of applications in mobile smart devices. It can be used to protect the processor from overvoltage and reverse polarity from the battery supply and from overcurrent from the DC/DC regulator output, ensuring the processor remains operational even in these fault conditions. Its dual-mode reset feature enables designers to select either a push-pull or open-drain reset output depending on their system requirements. In addition, the built-in watchdog timer can be used to detect system hangs or freezes, which triggers a reset to restore the system to its intended state.

The working principle of the MAX6884ETP+T is simple yet effective. When a supply voltage is applied to its input, the voltage-sensing circuit measures the voltage and compares it with the predetermined threshold voltage (VTH). If the measured voltage is less than the VTH, an error flag is asserted and an active-low reset is generated. The reset will remain asserted until the supply voltage is greater than the VTH. The supervisor also provides a watchdog timer that can be used to monitor system activity and trigger a reset when the watchdog timer expires.

The MAX6884ETP+T is a highly advanced supervisor device and can be an invaluable tool for electrical engineers designing board-level protection circuits for mobile smart devices. Its wide operating range and low-voltage detection accuracy make it well-suited for automotive, industrial, and consumer applications. As a result of its high-performance features and versatility, the MAX6884ETP+T is the ideal solution for applications requiring reliable and robust protection against overvoltage, reverse polarity, and overcurrent.

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