MAX709TESA+

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Power Management Integrated Circuit (PMIC) supervisors or also called supervisory chips enable designers to improve the overall system reliability by providing a variety of integrated functions such as power reset, power-on reset, power-down reset and system reset. The MAX709TESA+ Functional Supervisor, part of Maxim Integrated’s family of MAX709 Supervisors, is a power-on reset and manual reset supervisor with the ability to monitor VDD levels up to 6V.The MAX709TESA+ addressed the need of designers who wanted to improve system reliability by monitoring the voltage levels of multiple power rails and generating a system reset if any one of the voltages falls outside of its functional limits. It also provides a manual reset input to allow engineers to reset their system in case of an emergency or when a voltage is out of spec or does not come up properly. The MAX709TESA+ is a great solution for the customers who need a POWER-ON reset IC with a much lower supply current but do not sacrifice on the robustness of their designs.

The MAX709TESA+ is capable of detecting any voltage that’s out of specification and resetting the system on power-up. It can monitor multiple power rails up to 6V. It has an adjustable reset threshold voltage of 2.6V and with a typical delay of 8ms. It also has an active-high manual reset and an active-low power-down reset. A manual reset is useful for designers that want a way to reset the system without power cycle.

The MAX709TESA+ comes with a host of features that make it an excellent choice for power management, reset, and system supervisors. It is fully temperature compensated and capable of operating from -40°C to +125°C. It is designed with a typical 1µA supply current and has a 25µA max enable. There is an active-low power down input for power rail keep-out and a status output to indicate when the reset is active. The integrated watchdog timer has an initialize timeout period that is adjustable between 1ms and 255ms.

The MAX709TESA+ is used in a wide range of applications such as automotive, computing, consumer electronics, industrial and medical. Its low power consumption and its ability to detect multiple power rails makes it the ideal solution for devices that need reliable power management and reset. In automotive devices, it can be used to detect and reset if there are any voltage level spikes or if the system shuts down unexpectedly. In computing devices, it can reset a system if the voltage drops too low or if there is an unexpected power interruption. In industrial, consumer electronics and medical devices, it can keep the system powered on or reset a system in the event of a power failure.

The MAX709TESA+ Working Principle is based on a voltage comparator that monitors the voltage of the power rail and generates a reset signal if the voltage has gone beyond the defined threshold. The reset threshold is adjustable between 2.6V and 5.9V via the onboard trimmer resistor. The voltage of the power rail is sampled every 8ms, and if the voltage is below the threshold, a reset signal is generated. The reset signal is also enabled on power-up and is active-low when there is a reset event.

The MAX709TESA+ is a low-power, versatile and robust power-on reset and manual reset supervisor. Its ability to monitor multiple power rails up to 6V makes it ideal for a variety of different applications. Its low operating current and adjustable reset threshold makes it suitable for many types of designs. With its wide temperature range and high reliability, the MAX709TESA+ is the ideal choice for reliable power management, reset and supervisor applications.

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