TPS3809J25DBVTG4

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Power supply supervisors, or supervisors, are integrated circuits that monitor and manage the power system for a variety of products, such as microcontrollers, FPGAs, ASICs, as well as analog and digital circuits. TPS3809J25DBVTG4 is a member of the industry-leading 3-pin power supply supervisor family from Texas Instruments (TI). This -supervisor has a built-in window detector and reset generator that provides sequenced reset signals and allows flexible power reset timing. The high- impedance voltage monitor input is compatible with a wide range of voltage detectors.

Applications:

TPS3809J25DBVTG4 is a low-power supervisor IC specifically designed for use in embedded systems, automotive control units, microcontrollers and other high reliability applications. It is also suitable for applications where high accuracy, low power and low operating temperature are required. Applications include automotive electronics, sensors, home and office automation, remote controls, battery-powered electronics and any other device that requires power supply monitoring.

Features:

TPS3809J25DBVTG4 provides two types of reset functions: window-detector reset and delayed reset. The window detector reset allows the controller to initialize, de-initialize or switch between different application states based on the power supply voltage. It also provides a reset delay which gives the system time to stabilize before resetting the application. The delayed reset is also used to ensure a stable power supply. The integrated watchdog timer can also be used to detect unexpected system behavior. The device provides an open drain reset output, which is compatible with both low and high logic levels.The supply voltage range for the TPS3809J25DBVTG4 ranges from 1.8V to 5.5V, making it suitable for a variety of applications. It supports both active-high and active-low reset, and is offered in various package options including the industry-standard SOIC-8 package.

Working Principle

TPS3809J25DBVTG4 features an internal voltage monitor and comparator circuit which compares the output voltage of the power supply against a preset threshold voltage. When the voltage goes below the threshold, the supervisor will activate the reset signal. The reset signal is open-drain, which means that it can be connected to any type of digital logic (high or low).

When the power supply voltage rises and exceeds the threshold, the supervisor will reset the reset signal, and this reset signal can be used to initialize any system components such as microcontrollers. The reset signal can be set to active-high or active-low logic level, depending on the specific application requirements.

The other two main features of the TPS3809J25DBVTG4 are its built-in window detector and its delayed reset. The window detector monitors the power supply voltage and sets a window between two predetermined levels. When the voltage falls outside of the pre-determined window, the supervisor will activate a reset signal that can be used to switch off any system components. The delayed reset is used to ensure that the system has enough time to stabilize before the reset signal is issued.

Conclusion

TPS3809J25DBVTG4 is a low-power supervisor IC that is designed to monitor and manage the power supply of a variety of products. Its built-in window detector and reset generator provide sequenced reset signals and allow flexible power reset timing. It is suitable for a wide range of applications, including automotive electronics, sensors, home and office automation, and remote control systems. Its features and functionality make it an excellent choice for any application that requires reliable power supply monitoring.

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