MAX809TTR

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Power management integrated circuits (PMICs) are essential given the design complexity of modern electronic systems. They help streamline the design process and provide many ways to optimize the power supply solutions. The MAX809TTR is a supervisor integrated circuit (IC) that belongs to the PMIC family, specially created to provide a reliable and precise voltage measurement.

The MAX809TTR is a versatile IC featuring two separate supervisor inputs, a watchdog timer, programmable reset delay, manual reset, and active-low power fail output. Active-low reset is the standard output assertion type, but the IC includes an option to invert the reset signal by using an external capacitor. With a small package and a Quiescent Current rating of 1.3uA (typ), the MAX809TTR is suitable for battery-operated and portable applications.

Application Field

The MAX809TTR has a wide range of applications as a reliable and accurate voltage supervisor for multiple supplies. It can detect discrepancies between power supply voltage and preset reset thresholds, acting as an early warning system for potential problems within electronic systems. The IC relies on the user programming the reset thresholds of their particular system in order to work properly.

The IC is ready for a wide range of challenging applications like vending machines, portable gaming, in-car entertainment systems, access control, portable and automotive instrumentation, and a variety of other commercial and industrial systems. All these devices require a reliable power management solution and a mechanism to identify any power fault in order to guarantee uninterrupted operation. The MAX809TTR is an excellent option to address those issues.

Working Principle

The MAX809TTR works as a digital circuit, providing output signal to the connected devices, such as micro-controllers and other components. It has two separate reference comparators to monitor both voltage sources. When the power supply does not reach the user-programmed reset threshold, then the IC asserts an active-low reset signal for a programmable amount of time. The MAX809TTR is designed to take into consideration both short-term and long-term changes in the power supply, thus, providing a reliable and precise safety net for the system.

The extra features included in the IC like manual reset, watchdog timer and power fail output, provide an extra layer of security for the system. The watchdog timer\'s main purpose is to help the system recover from unexpected failures such as lockups and freezes. The power fail output can be used by a micro-controller to detect power source discrepancies and avoid misoperation.

Overall, the MAX809TTR is an amazing power failure and undervoltage protection supervisor integrating both reset drive and voltage detection functionalities. Its tiny package and ultra-low power requirements make it the ideal choice for a wide range of demanding applications.

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