MAX690SEPA+

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Power Management Integrated Circuits (PMICs) act as a vital role in the overall functioning of electronic systems. The MAX690SEPA+ is one of their smarter, efficient supervisors. It offers a range of adjustable functions and is ideal for applications in which power management of microprocessors and/or other integrated circuit functions is needed. This article will discuss the application field and working principle of the MAX690SEPA+.

Application Field

The MAX690SEPA+ is an active low-power supervisor (LPS) with an adjustable reset delay, reset output timeout, and a push button override feature. The MAX690SEPA+ based LPS can be used in a wide range of applications. It is mainly employed in systems where an LPS is needed to monitor and provide proper power management of microprocessors, as well as other sensitive ICs.

The MAX690SEPA+ also comes with a watchdog timer that is adjustable to allow for reset of the microprocessor after a specific amount of time. This is especially helpful when a system could become locked up and have to be rebooted. The MAX690SEPA+ can also be used to provide power failure sampling for systems that are powered by a single, continuous power source.

The MAX690SEPA+ offers flexibility between extended reset timeout and active mode current to allow for a variety of uses. It can perform power management functions in a reliable manner. This allows the system to detect and respond to any voltage or temperature irregularities by resetting the processor or other ICs, which helps to ensure effective performance.

Working Principle

The MAX690SEPA+ supervisor consists of a comparator, a reset timer, a watchdog timer, and an output. The comparator monitors two voltages, the power-on voltage and the reference voltage. If the power-on voltage drops below the predefined reference voltage, a PowerOK signal is generated. This power-on voltage is then monitored by the reset timer and the watchdog timer to detect any short duration power losses.

The reset timer allows for an adjustable reset delay after the PowerOK signal is detected. This reset delay can be used to reset any processors or other ICs in the system. After the reset delay has been completed, the watchdog timer will begin counting down until it reaches the predefined timeout, at which point the RESET signal will be generated.

The push-button override feature allows for users to manually reset the system if needed. The MAX690SEPA+ can be programmed so that the push-button reset will reset the system only during a certain time period. This helps to prevent unintentional resets.

In summary, the MAX690SEPA+ active low-power supervisor helps ensure reliable system performance by performing power management functions and providing adjustable reset delay and reset timeout. This allows the system to detect and respond to any voltage or temperature irregularities by resetting the processor or other ICs in a timely manner. The push-button override feature also helps to ensure that the system can be reset manually whenever needed.

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