CAT811MTBI-GT3

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Power Management Integrated Circuit (PMIC) is an important component in the electrical engineering industry, providing power conversion and control within the system to make sure the effective functioning of the entire system. Supervisors in PMIC play a vital role in such sense, providing power supervision. CAT811MTBI-GT3 is one of such supervisors launched by ON Semiconductor.

Introduction of CAT811MTBI-GT3

CAT811MTBI-GT3 is based on an I2C architecture and has a power supervisor with open-drain reset outputs. It is designed to provide supplier-independent power-supply monitoring capability for intelligent systems. The supervisor is compatible with 3V, 3.3V, 5V, and 12V power supplies, and is capable of operating from supply voltages ranging from 1.71V to 5.5V.

CAT811MTBI-GT3 can be used for monitoring a wide variety of supply voltages. It monitors up to three supply voltages, providing both reset outputs and active/inactive status information, as well as power-good and power fail indication. The supervisor can also be used to monitor combined logic level supply and a low-V_ccstandby supply.

The CAT811MTBI-GT3 has a precision voltage reference, voltage supervision and delay circuitry, current source to provide reference current, and multiplexer and active-low reset generator block. It is capable of verifying up to four supply voltages (one with power-fail ringing) at the same time and detect supply voltage transients below the reset threshhold.

Application Field of CAT811MTBI-GT3

CAT811MTBI-GT3 is mainly used for protection and monitoring power supply in systems. Combining the high accuracy and low power consumption, it is widely applied in various fields such as the aerospace, automotive, communication, industrial and medical industries. It can also be used for normal power supervision in high reliability system and telecommunication systems.

In industrial environment, the system supervision can protect the device from suffering from overvoltage and undervoltage damage. It can also be used for providing reset for the system, preventing system errors caused by overvoltage or undervoltage shocks. In broadcast communications, CAT811MTBI-GT3 is used to provide supply supervision before further system switching or calling of the communication system.

In automotive systems, CAT811MTBI-GT3 can be used to protect the electrical systems from power surges and other power supply fluctuations, preventing any unexpected system failures. In the medical industry, this product can be used to monitor the vital signs of patients, such as vital sign monitoring and remote monitoring systems.

Working Principle of CAT811MTBI-GT3

The working principle of CAT811MTBI-GT3 is based on its numerous interconnected components, composed of the power monitoring instrument, reference voltage circuit, power relays and power failsafe circuits. Its main functions include providing a precise reference voltage, setting a temperature compensation buffer, monitoring the power supply status, and outputting a power fail signal.

The basic working principle of the device is that it compares the power supply voltage with the reference voltage. If it exceeds the power threshold level, the on-chip comparator will detect it and trigger an output reset signal to prevent the system from malfunctioning. The CAT811MTBI-GT3 is also capable of providing temperature compensation over a wide range of temperature, allowing the device to operate reliably in various environments.

In addition, the CAT811MTBI-GT3 is equipped with the power failsafe circuitry, which enables the supervisor to continue monitoring the power supplies even during power failure. This guarantees the system stability during the switching of power supply sources.

Conclusion

The CAT811MTBI-GT3 power supervisor is an important part of PMIC, widely used in various industries as power protection and monitoring circuitry. Its main feature is that it can monitor up to four supply voltages, providing both reset outputs and active/inactive status information, as well as power-good and power fail indication. The working principle is that it compares the power supply voltage with the reference voltage to detect the power status and output a reset signal in order to prevent any system failure.

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