BU4340F-TR

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Power management integrated circuits (PMICs) are commonly used in modern electronic systems to regulate and manage the voltage and current levels of different components. These components range from simple, low-power sensors and microcontrollers to complex, high-power components such as processors and graphics cards. PMICs are designed to optimize system power efficiency and maintain overall system performance. One such PMIC is the BU4340F-TR, a voltage supervisor module that is capable of detecting short-term dips and over-voltage conditions in single-ended or differential system voltages. In this article, we will look at the application field and working principle of the BU4340F-TR.

Application Field and Specifications

The BU4340F-TR is ideally suited for use in SoCs and FPGAs, as well as in multi-voltage systems. It is also suitable for use on single-ended or differential powered systems, offering both over-voltage and under-voltage protection. This voltage supervisor module is capable of operating in temperatures ranging from -40°C to +125°C, and can withstand up to 8kV of electrostatic discharge.

The BU4340F-TR comes with an adjustable threshold voltage that can be set between 1.0V and 3.6V. It is made up of a voltage detector, comparator, and reference voltage circuit, which are all packaged into a 3 mm x 3 mm QFN package. The module also features an over-voltage/under-voltage input, a reset output, and an open-drain interrupt output.

Working Principle

The BU4340F-TR uses a comparator and reference voltage circuit to monitor the input voltage. Whenever the input voltage crosses the adjustable threshold voltage, the comparator triggers an output. This output is then amplified and sent to the open-drain reset output, which can be used to reset any system component or inhibit any system activity. The module also features an over-voltage/under-voltage input, which can be used to monitor the voltage level of the input system.

To ensure robust voltage protection, the BU4340F-TR is equipped with an adjustable debounce circuit. This ensures that the device does not respond to any transient voltage changes, and that only sustained changes in input voltage are monitored. In case of a sustained over-voltage or under-voltage condition, the device will trigger a warning signal and can reset any system component or inhibit any system activity. The BU4340F-TR is also equipped with a power sequencing circuit, which allows the voltage supervisor to remain enabled even in the presence of a low-voltage condition.

Conclusion

The BU4340F-TR is an effective voltage supervisor module for monitoring single-ended and differential voltages. It is designed to protect systems from over-voltage and under-voltage conditions, and comes with a range of features such as an adjustable debounce circuit, power sequencing circuit, and an open-drain interrupt output. The BU4340F-TR is ideal for use in SoCs and FPGAs, as well as multi-voltage systems, and is capable of operating in a wide temperature range.

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