BU4847FVE-TR

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The BU4847FVE-TR is a high-performance supervisory IC from ROHM Semiconductor, packaged in a SOT-25 package. It is used in a variety of applications that require precision control of circuit power-up, power-down and undervoltage protection. It is designed to protect circuits from voltage irregularities, noise and transient signals, as well as providing a precise reference voltage for circuit stability. This supervisory IC is designed to proactively monitor the power supply to a circuit and immediately shut the circuit off in the event of power irregularities.

The BU4847FVE-TR uses a unique architecture to monitor the input voltage and reset output. The input voltage is monitored through an internal VT pin, which is compared to the reference voltage, which can be set with external resistor divider networks. The reset output then signals the circuit to respond to internal or external undervoltage events. The reset output is also connected to the reset output pin, which can be configured for open-drain or push-pull operation. The reset output can be set via external resistor configuration or by internal logic. An additional internal power-on reset status can be monitored via the POR pin.

The BU4847FVE-TR is designed to function with a wide range of input voltages, from 1.8V to 5.5V. It also features an automatic power-down detection. When the input voltage falls below the power-down threshold, the IC automatically turns off the power-on reset output and disables the reset output. This helps to reduce power consumption and protect the circuit from potential damage.

The BU4847FVE-TR also features a programmable reset output polarity and a programmable reset delay. This allows the reset output to be configured for active high or active low polarity and for adjustable delay times. This helps to ensure that the reset output is triggered correctly when an undervoltage event occurs. The IC also includes an internal clock oscillator that allows for quick start-up, allowing the power management IC to operate quickly and efficiently.

The BU4847FVE-TR is a popular choice for applications that require precision control of power-up, power-down, and undervoltage protection. It is used in a variety of electronic devices including medical equipment, lighting applications, battery powered products, automotive systems, and communications systems. Its features, such as programmable reset output polarity, adjustable reset delay, and power-down detection, make it an excellent choice for reliable power and voltage management in a variety of applications.

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