MAX6725AKAVDD3+T

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PMIC - Supervisors

The MAX6725AKAVDD3+T is a comprehensive supervisor/power-supply sequencer for use in microprocessors. This device monitors the system’s power-supply voltage, measures the supply voltage, and then sequences system power-supply rails in order to protect the microprocessor. The MAX6725AKAVDD3+T is especially suited for use in microprocessors found in desktop personal computers, notebooks, and servers.

Features

• Integrated reset, watchdog, and power-on reset circuits
• Supports adjustable low-voltage detect, high-voltage detect, and power-on reset attach/detach functions
• Integrated power-on reset, watchdog reset, and manual reset functions
• Two complete power-supply sequencer channels
• Internal pull-up and pull-down resistors for easy microprocessor sequencing

Operation

The MAX6725AKAVDD3+T operates as a simple power-supply controller. Upon power-up, it first checks the system’s power-supply voltage, and then sequentially powers up the microprocessor. As soon as the voltage reaches the target (set by a control line on the processor), the power is turned off and the MAX6725AKAVDD3+T waits until the voltage drops to the specified level. The MAX6725AKAVDD3+T then powers up the microprocessor again. This process is repeated until the minimum and maximum voltage levels are achieved. The MAX6725AKAVDD3+T also provides an additional optional protection mechanism. This mechanism is triggered when the voltage is below the specified minimum or above the specified maximum. The circuit then powers down the processor and places it in a low-power state. The processor will remain in the low-power state until the voltage is restored.

Applications

• Desktop PCs
• Notebooks
• Servers
• Medical equipment
• High-end test instrumentation
• Communication systems

Advantages

The primary benefit of the MAX6725AKAVDD3+T is the increased safety it provides for microprocessors. The device offers protection against overvoltage and undervoltage, making sure the processor is safe from any accidental damage. Additionally, the MAX6725AKAVDD3+T also provides built-in power-on reset, watchdog reset and manual reset functions, further increasing the protection of the processor. The MAX6725AKAVDD3+T also offers an adjustable reset voltage, which allows for easy adaptation to the specifications of any given processor. This feature is especially useful for applications requiring higher-level accuracy than that of a traditional standalone power-supply sequencer.

Conclusion

The MAX6725AKAVDD3+T is a comprehensive device that provides understanding and control of system power-supply voltages. The device offers a number of features such as adjustable low-voltage detection, reset and watchdog functions, power-on reset attach/detach, and two complete power-supply sequencer channels. This device is suitable for use in desktop PCs, notebooks, and servers as well as other applications in need of increased safety for their microprocessors. The adjustable reset voltage function is an extra feature of the MAX6725AKAVDD3+T that provides flexibility for any given application.

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