BU4317FVE-TR

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PMIC (Power Management Integrated Circuit) supervisors are integrated circuits designed to supervisory multiple power rails, providing power-good indicators, reset outputs, undervoltage detection circuits, and other voltage-level or power-state detection circuits for system power sequencing. The BU4317FVE-TR is a standard-type power management IC (PMIC) supervisor from ROHM Semiconductor, providing a wide range of voltage-detection and reset functions. It has a wide supply voltage of 2.0 V to 5.5 V, making it suitable for use in multiple applications.

Applications

The BU4317FVE-TR is typically used to monitor different power systems and detect the power supply voltage level and its stability. It is ideal for monitoring different power rails in consumer and industrial applications, such as digital television (DTV) and automotive PLC systems. It is also used to assure safe power supply operations in telecommunications, data storage systems, and power supply systems.The BU4317FVE-TR is available in SOT-23-6 and our packages, offering a wide temperature range and a high level of accuracy. Its small size and low power consumption enable it to be used in various small-size consumer systems. Additionally, its two control pins are programmable, making it suitable for a variety of reset functions, such as in power sequencing applications.

Working Principle

The BU4317FVE-TR is a voltage and temperature supervisor IC. It monitors and provides information about the power supply status and power supply line voltage in order to maintain system stability and prevent any false operations. When the voltage condition inside the IC is incorrect, the power-good (PG) output is driven low, which can detect potential system issues. This output is also active low when the power supply has reached the programmed voltage, and inactive high when the power supply voltage falls below the programmed voltage.

The BU4317FVE-TR features two independent power-good outputs, allowing the supervisor to evaluate multiple nominal voltages and reset conditions at once. The reset output is designed to stay low until the power supply voltage reaches a given level, or until the output is disabled. This prevents any false operations or incorrect system startups. The reset output is also responsible for providing reset output for general system reset function, which will reduce power consumption.

In addition, the BU4317FVE-TR has an adjustable UVLO (under-voltage lock-out) function, which can monitor the supply voltage and detect if it falls below a certain level. If the voltage is too low, the output will be disabled and will turn off automatically. This prevents the system from operating in a dangerously low power supply voltage.

The BU4317FVE-TR also features a temperature detection system, which can monitor the IC’s own temperature and detect if it is too high. This monitors the IC’s temperature during operation, reducing system operation risks.

Overall, the BU4317FVE-TR provides a wide range of features and functions to help ensure reliable system operation and power supply management. Its wide temperature range, high accuracy, and low power consumption make it an ideal choice for a variety of PMIC - Supervisors applications.

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