LM4050QCIM3-2.0/NOPB

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Voltage reference is an important feature of Power Management Integrated Circuits (PMICs). It allows for the control and regulation of voltage to ensure power is distributed in a safe, reliable and efficient manner. This article will discuss the application field and working principle of the LM4050QCIM3-2.0/NOPB device, a low-dropout adjustable low-power voltage reference.

Application Field

The LM4050QCIM3-2.0/NOPB is used primarily in battery-powered applications, such as portable medical and consumer electronics. This voltage reference can provide up to 2V of low-dropout precision voltage with low quiescent current, making it an ideal choice for portable applications. Furthermore, its wide operating temperature range of −40°C to +125°C makes it suitable for applications that require highly reliable operation over wide temperature ranges.

Working Principle

The LM4050QCIM3-2.0/NOPB device is an adjustable low-power low-dropout voltage reference with a wide adjustable range of 1.235V to 2.470V. The device consists of a voltage reference input, a band gap reference, a reference amplifier and a reference output. The voltage reference input is where the user can set the desired output voltage using a resistive divider connected between the input pin and ground (or the input pin and VCC). The band gap reference is a temperature-stable reference voltage and is used to continuously supply the reference amplifier the reference voltage for it to compare the reference input voltage with. Any discrepancy would cause the reference amplifier to regulate the output voltage by amplifying or attenuating the reference input, thereby maintaining the desired output voltage. The reference output terminal will then supply the load with the regulated output voltage.

Conclusion

LM4050QCIM3-2.0/NOPB is an adjustable low-power low-dropout voltage reference that is suitable for portable applications. Its wide operating temperature range and low quiescent current make it an ideal choice for power supply designs in battery-powered systems. The device works by comparing the reference input voltage against the band gap reference and regulating the output voltage accordingly.

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