LMV431BIMF/NOPB

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The LMV431BIMF/NOPB is a voltage reference integrated circuit that belongs to a family of precision low power three-terminal adjustable shunt regulator. It is used to provide an adjustable temperature coefficient, high precision reference signal for diverse applications such as microprocessor-based systems, programmable analog/digital circuitry and automotives. It is also use for signal conditioning with gain and offset networks, active filter circuits, linear regulation and feedback protection.

The application field of LMV431BIMF/NOPB is mainly concentrated in the arena of power management integrated circuits, where it’s used as a voltage reference in order to ensure a reliable and stable power source. It is also applicable to all kinds of steady voltage source applications such as embedded system, industrial and medical equipment, communications systems etc.

The working principle of LMV431BIMF/NOPB is a combination of two operational amplifier stages and a feedback resistor. The combination provides a relatively stable reference voltage and temperature coefficient. The output voltage is internally balanced by two amplifier stages, providing the reference voltage accuracy of 2mV from ambient temperature at 5V power supply. With an external series voltage regulator, it is possible to output the reference voltage up to 16.5V.

The internal circuitry of the LMV431BIMF/NOPB includes a band-gap voltage reference with a shunt regulator. The band-gap reference has an external IC pin dedicated to adjusting the output voltage and employs a precision network to achieve temperature stability. The shunt regulator works depending on the output current delivered by the regulator. It measures the voltage across a resistor between input and output. The output voltage is usually 10-25% of the input voltage. The whole circuitry is powered by a single supply voltage of 2.3V to 16V.

In summary, the LMV431BIMF/NOPB is a low power, precision, three–terminal adjustable shunt regulator integrated circuit designed for use as a voltage reference in power management related systems. It offers excellent characteristics in terms of accuracy, temperature stability and output voltage. It is able to provide an adjustable temperature coefficient and a stable reference signal that meets the demands of various applications such as microprocessor-based systems, programmable analog/digital circuitry and automotives.

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