MAX6464UK26+T

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Supervisors are devices commonly used in electronic devices for providing safe power for the device and ensuring that it functions in the most efficient way possible. The MAX6464UK26+T is an optimal supervisor integrated circuit designed for a variety of applications requiring power supply monitoring, fault detection and protection management. This article will discuss the applications and working principles of the MAX6464UK26+T.

Applications

The MAX6464UK26+T is suitable for applications such as processor cores, integrated graphics, FPGA/CPLD, analog, and microcontroller-based systems. It features an input supply voltage (V _IN) range of 0.9 to 6.0 V and an overvoltage (OV) monitoring range of 1.5 to 6.5V. The capability to monitor both VIN and OV means that the MAX6464UK26+T can provide protection from faults in the input power supply. It also provides an adjustable reset window of 0.1V to 1.3V in order to guarantee that the system stays reset for an extended period of time in the event of a fault in the input power supply.

The MAX6464UK26+T integrates a three-state supply monitor with programmable fault detection latches and priority functions. This enables it to monitor multiple power supplies and respond to power supply events. For example, it can detect faults on the VIN rail and transition to the low power sourced OV pin while still keeping the system active, allowing the system to maintain functionality until the power supply is reset. In addition, the MAX6464UK26+T includes an active low reset, a manual reset, and a supervisor-disable pin, giving flexibility to the user to control the reset cycle of the system.

Working Principle

The MAX6464UK26+T monitors the VIN and OV rails by using an internal, hysteresis comparator. When the VIN falls below the reset threshold voltage of 0.1V, the comparator will trigger the RESET output of the integrated circuit, resetting the system. When the V _IN rail is between 1.3V and 0.1V, the comparator will generate an active-low reset signal. This signal will be passed to the RESET output and will keep the output active until the power supply is reset.

When a fault is detected on the OV rail, the MAX6464UK26+T will transition to the low power sourced OV pin, maintaining system activity until the power supply is reset. This feature allows the system to remain functional, albeit at a reduced power level, until the power supply is reset. Additionally, the MAX6464UK26+T includes a manual reset pin which can be used to manually reset the system in the event of a fault on the power supply.

The MAX6464UK26+T also includes an ENABLE pin, which can be used to disable the active-low reset signal. This feature can be used to put the system into a low-power state while still monitoring the power supply for faults. Additionally, the MAX6464UK26+T supports an interrupt output pin which can be used to notify a host processor of an event on either the V_IN or OV rails.

Conclusion

The MAX6464UK26+T supervisor integrated circuit is an optimal solution for monitoring and protecting a variety of power supplies. By monitoring both the input voltage (V _IN) and overvoltage (OV) rails, the MAX6464UK26+T can provide protection against faults in the power supply. Additionally, the MAX6464UK26+T provides a range of features such as adjustable reset windows, manual and active-low reset pins, and an interrupt output. These features combine to make the MAX6464UK26+T an ideal supervisor for any application.

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