BD3931FP-E2

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PMIC - Voltage Regulators - Linear

BD3931FP-E2 is a type of voltage regulator, a linear voltage regulator specifically. It is designed for supplying power to DSP and microcomputers. It is built on tiny 8-pin package which is suitable for low profile and space saving design.

Application Field

Because of its design, the BD3931FP-E2 is mainly suitable for USB power supply, digital still camera(DSC), PDAs, electronic books, digital voice recorder and other portable electronic devices that requires higher current output. It is also suitable for providing high-speed or slow-speed response to high-speed switching power supply with its precise output precision.

Working Principle

The BD3931FP-E2 is a linear regulator with a simple pinout and easy to use features. It works by taking input voltage and reducing it to a different voltage level which is specified by a resistor divider network located at the negative input pin. It does this by using a P-channel MOSFET to pass current from the input voltage to the output voltage. When the output voltage fall below a set voltage, current starts to flow from the output through a current sensing resistor, triggering an internal error amplifier which turns on the P-channel MOSFET until the output voltage is restored.

The BD3931FP-E2 allows for fast transient response, which means it can quickly adjust the output voltage as capacitor charges and discharges. It also features a low power shutdown and overvoltage protection that cuts off the output voltage when it goes beyond its rated voltage of 5.5V.

Conclusion

BD3931FP-E2 is a versatile linear voltage regulator suitable for various voltage levels used in electronic devices. It has a small size and high power efficiency, making it an ideal choice for portable devices that require higher current output. Its fast transient response is highly reliable and its overvoltage protection keeps devices safe under abnormal conditions.

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