MAX6791TPSD2+T Integrated Circuits (ICs)

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The MAX6791TPSD2+T is a highly-integrated, high-efficiency, dual-channel supervisor with built-in reset signals and level detection, that is intended for monitoring multiple power rails and/or input voltages of an electronic system. This application field notes is intended to provide an initial understanding of the MAX6791TPSD2+T.

Application Field of MAX6791TPSD2+T

The MAX6791TPSD2+T is a new generation of supervisor ICs which is designed to monitor multiple power rails and/or input voltages of an electronic system. With two independant voltage channels that are designed for monitoring two separate power supplies, MAX6791TPSD2+T offers improved signal accuracy, a low detection voltage, wide temperature range and miniaturization. It boasts a wide operating voltage range from 2.7V to 5.5V, allowing it to be used in the majority of systems.

In addition to its primary application as a power supply supervisor, it is also able to monitor slow moving supply signals that remain within their valid operating range for extended periods of time. By integrating two independent voltage monitors in this supervisor IC, it allows each channel to be employed as a power supply monitor, trigger interrupt or reset signal as long as the voltage remain in the specified range.

The MAX6791TPSD2+T has also become popular in other applications such as programmable logic controller (PLC) power-up, over-voltage protection in automotive and industrial applications, battery monitoring in battery-operated equipment, server power management and power sequencing. It is well-known for its superior precision and reliability, which makes it an ideal choice for critical applications.

Working Principle of MAX6791TPSD2+T

The operating principle of the MAX6791TPSD2+T is similar to other power supply supervisors. When it detects a power rail voltage or input voltage level that is not within specification, it will assert a reset or interrupt signal, or it may trigger an external MOSFET switch to regulate the output. The microprocessor can then be informed of the error condition via an interrupt.

The MAX6791TPSD2+T integrates two independant voltage level monitors, each can be programmed either for power on reset (POR) or window watchdog (WWD). When one of these two monitors detect that its input voltage is either below or above its programmed threshold during a monitor cycle period, an output reset or interrupt signal will be generated. As each input channel has independant programming, these provides more flexibility for application-specific configurability. In addition, the window watchdog feature can be used for assisting supply sequencing for avoiding unnecessary glitches by setting two different thresholds for each channel.

The MAX6791TPSD2+T also supports a wide range of features such as adjustable reset or interrupt delay, manual reset input, open-drain or push-pull output, low voltage detect (LVD) and adjustable watchdog window. These features extend its capabilities even further and make this power supply supervisor IC an excellent choice for many different applications.

Conclusion

The MAX6791TPSD2+T power supply supervisor is a highly-integrated, high-efficiency, dual-channel supervisor with built-in reset signals and level detection capabilities. It offers improved accuracy, a wide operating voltage range, low detection voltage and wide temperature range. This makes it ideal for applications such as machine and server power management, overvoltage protection and battery monitoring. It also integrates features such as adjustable reset or interrupt delay, manual reset input, open-drain or push-pull output, low voltage detect (LVD) and adjustable watchdog window, which further extend its capabilities.

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