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PMIC - Voltage Reference

The Texas Instruments LM4050QAIM3-10/NOPB is a popular and commonly used voltage reference in the PMIC (Power Management IC) family. It is a low-power, stable, precision, precision voltage reference designed for use in applications such as power management, motor control, voltage monitor, and system basis measurement systems. The LM4050QAIM3-10/NOPB is also able to be used in automotive environments, such as vehicle-mounted applications and off-board applications. This voltage reference is able to provide a high degree of accuracy and minimal noise in a wide temperature range of -40°C to +125°C. It offers a wide variety of features such as low power consumption, a wide input voltage range, an adjustable output voltage and an integrated shunt-regulator.

Applications

LM4050QAIM3-10/NOPB voltage references are used primarily as a power management IC, which provides a fixed voltage reference and delivers a steady current over a wide range of voltage levels. It can be used in a wide variety of applications, including power supply and filtering, portable and automotive electronics, industrial electronics, instrumentation and medical applications, and many others. The LM4050QAIM3-10/NOPB is also used as an adjustable voltage reference for precision current sensing.

Working Principle

The LM4050QAIM3-10/NOPB is an adjustable voltage reference that operates using a bandgap reference technology. This technology uses a bandgap voltage reference, which is an on-chip voltage reference with an extremely low temperature coefficient. The voltage reference is formed using two transistors in an opposing-current mirror configuration, which generates a voltage drop corresponding to the bandgap voltage between the two transistors. The LM4050QAIM3-10/NOPB also contains an integrated shunt-regulator that is used to adjust the reference voltage output. The shunt-regulator is used to achieve a higher accuracy of the output voltage by providing a buffering effect to reduce the noise on the voltage output and eliminate the effects of temperature drift on the output voltage. When the reference voltage is set, the output voltage is equal to the voltage reference input, plus the shunt-regulator voltage difference. Additionally, the output voltage is also affected by the current that passes through the device, so the output voltage needs to be adjusted accordingly depending on the application.

Conclusion

The LM4050QAIM3-10/NOPB is a popular and commonly used voltage reference in the PMIC family. It is designed for use in a wide variety of applications, such as power management, motor control, voltage monitor, and system basis measurement systems. It offers a wide variety of features such as low power consumption, a wide input voltage range, an adjustable output voltage, and an integrated shunt-regulator. The integrated shunt-regulator allows the output voltage to be accurately set and buffered to reduce noise and eliminate the effects of temperature drift on the output voltage.

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