TC54VC4402EZB

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TC54VC4402EZB is a Supervisory Circuits (aka Supervisors) and it is a type of Power Management IC (PMIC). It functions to monitor up to five power supplies with a variety of outputs and configurations, including reset and supply control. In simple terms, Supervisory circuits ensure that power supplies remain in the correct state of operation, providing a fail-safe mechanism in the event of any system fault or malfunctions.

TC54VC4402EZB is an versatile PMIC as it is capable of monitoring a multitude of input voltages such as 3V, 5V, 9V, 14V, and 28V. It provides a configurable reset output, which can be adjusted for active-low or active-high logic. The nominal reset assertion time is adjustable from 9.3 to 491 milliseconds. In addition, it is RoHS compliant and available in SOT packages.

This supervisor is primarily used for power-supply monitoring in consumer and industrial applications. Its features such as adjustable reset time and active-high/low reset output make it suitable for a variety of applications including computers, cell phone charging, netbooks, gaming consoles, industrial/building automation, and other consumer/mobile/embedded electronics. In automotive applications, it could be used for system reset, power-fail detection, and brown-out applications.

At a high-level, the working principle of the TC54VC4402EZB is relatively straight-forward. It monitors the input power supplies and asserts a reset signal when any of the power supplies reach their respective preset trip points. The two main trip points are the power supply under voltage (UVLO) and over voltage (OVLO). Once either of these trip points is reached, the supervisor automatically asserts a reset signal, thereby preventing any power supply failure or malfunction.

The TC54VC4402EZB includes an upgrade feature that allows for new trip points to be defined, allowing for better power-supply monitoring and control. In addition, an open-drain reset output and an active-high/low reset output provide further utility when needed. Also, several digital filter options eliminate spurious reset signals, thereby ensuring stable operation.

Overall, the TC54VC4402EZB offers a wide range of features and benefits. It is capable of monitoring multiple input voltages and can be configured for various reset times. Its compact size and versatility make it suitable for a wide range of consumer and industrial applications. In addition, its open-drain reset output, active-high/low reset output, and digital filter options ensure reliability and stability, making it an ideal choice for power-supply monitoring.

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