MAX6808US46+T

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The MAX6808US46+T is one of the most popular supervisors in the eletrical power management integrated circuit (PMIC) market. This device is mainly used for low-voltage applications but also provides a built-in timer for high-voltage applications. It is a cost-effective solution for voltage and current sensing, providing accurate monitoring, flexibility, and reliable performance. This device is designed for use in a wide range of industrial, consumer, automotive and communication applications.

The MAX6808US46+T is an 8-pin supervisor with both a low-voltage transient and overvoltage monitoring circuit. The device features an internal 5V supply, a precision reference, and two comparators. The low-voltage circuit is designed to detect a preset low-voltage event, while the overvoltage comparator monitors the supply voltage. Both circuits have thresholds independently settable via external resistors.

The MAX6808US46+T also contains a built-in timer, which is activated when the voltage on the capacitor connected to the Output Delay pin exceeds the preset threshold. The timer then triggers an output signal, which can be used to control external circuitry or alert the user to an overvoltage event. Additionally, the device has an Output Overdrive control pin, allowing users to program the overvoltage protection circuit to shut off output power during extreme overvoltage conditions.

When using the MAX6808US46+T in low-voltage applications, the device uses a voltage monitor and comparator with preset thresholds that are externally set by resistors. The voltage monitor monitors the supply voltage and if it drops below the preset threshold, the output of the comparator goes low, signaling an overvoltage event. An output signal is then sent to the Output Delay pin, activating the built-in timer. When the output of the timer is low, the overvoltage protection circuit is activated and the output is shut off.

In high-voltage applications, the MAX6808US46+T uses a current-sense transistor circuit with preset thresholds to detect overcurrent and overvoltage conditions. The current-sense transistor is used to monitor the current in the power supply, and when an overcurrent or overvoltage occur, the output of the comparator goes low, signaling an overvoltage event. An output signal is sent to the Output Delay pin, activating the timer and shutting off the output.

The MAX6808US46+T contains a programmable reset output pin. The reset output is activated by the output of the comparator, indicating an overvoltage event. This pin can be programmed to provide an active-low reset with a delay or an active-high reset with a debounce. Additionally, the device can be used to monitor input voltage and provide a reset output when the voltage exceeds a preset threshold.

The MAX6808US46+T provides a low-cost, high-performance solution for low-voltage and high-voltage applications. It features programmable thresholds, a built-in timer, and versatile outputs that can be used to control external circuitry or alert the user. The device is designed to provide reliable and accurate protection from overvoltage and overcurrent conditions, making it a popular choice for industrial, consumer, automotive, and communication applications.

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