TPS3808G33DBVRG4

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The TPS3808G33DBVRG4 is an adjustable voltage supervisor for managing and monitoring microprocessor-based systems. It is classified under PMIC - Supervisors. This device is used to monitor power supplies and detect voltage drops below a specified level, offering system protection against brown outs or outright power failure. The working principle and application fields of TPS3808G33DBVRG4 are discussed in this article.

Working Principle

The TPS3808G33DBVRG4 is used to monitor voltage levels in microprocessor-based systems. The working principle of this device is based on the comparator principle. It has two comparators (A and B) which are triggered when the monitored voltage level drops below a set threshold voltage. When either of the two comparators is triggered, it asserts the reset pin of the processor, thus protecting the system from sudden power fluctuations and system crashes.

The TPS3808G33DBVRG4 can be used in two different modes: the manual reset and the reset timer. In manual reset mode, the device monitors for a voltage drop and asserts the reset pin immediately. In reset timer mode, the monitored voltage is compared to the threshold voltage over a specified time, and if the voltage drops below this level for the duration, the reset pin is asserted. This useful feature prevents false triggering of the device.

The device comes with a so-called “compensation pin” which is used to compensate the voltage drop relative to ground. It is used to detect undershoots of 1V relative to the ground. This prevents false triggering of the device when the actual power supply drops below the desired level.

Application Field

The TPS3808G33DBVRG4 is commonly used in microprocessor-based systems that require accurate and reliable monitoring of voltage levels. It offers system protection against brown outs or outright power failure. The device is especially useful in situations where a sudden power surge or drop could have catastrophic effects on the system. For example, it is used in medical equipment and embedded industrial systems. It can also be used to monitor and protect sensitive components, such as memory chips, that are susceptible to voltage fluctuations.

The manual reset and reset timer modes allow the TPS3808G33DBVRG4 to be adapted to a wide range of applications. It can be used in situations where a quick reset is required, such as in medical equipment. It can also be used in industrial applications where a slow reset is desired, such as in embedded systems. The compensation pin allows for better accuracy and is especially useful in applications where power is taken from multiple sources or there is a high level of noise or interference.

Additionally, the TPS3808G33DBVRG4 is highly configurable. It has two external resistors which can be used to adjust the threshold voltage, hysteresis, and reset timer. These settings can be adjusted to suit the application’s specific requirements. In this way, the device can be used to monitor and protect a wide range of microprocessor-based systems.

Conclusion

The TPS3808G33DBVRG4 is a versatile voltage supervisor which is used to monitor and protect microprocessor-based systems. It is classified under PMIC - Supervisors, and is useful in a wide range of applications, such as medical equipment and embedded industrial systems. The device operates on the comparator principle and offers system protection against power failure or sudden drops in voltage. It has two external resistors which can be used to adjust the threshold voltage, hysteresis, and reset timer, allowing for greater flexibility and customization.

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