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PMIC - Voltage Reference

Power management integrated circuit (PMIC) products are widely used in automotive, energy, industrial and consumer markets to maximize energy efficiency, reliability and performance. A voltage reference is a device used to provide a precise voltage reference for low-voltage digital circuits from an unregulated voltage source. The LM4121IM5-ADJ is a precision ultra-high-accuracy reference, designed with an operating temperature range from -40 to +85 degrees Celsius.

LM4121IM5-ADJ Application Field

The LM4121IM5-ADJ is a low-power voltage reference designed for low-voltage applications. It is ideal for use in voltage regulator circuits and LED current controllers. This device is also suitable for industrial and telecommunication systems, where accuracy and stable references are needed in harsh environments. Its low power consumption and highly accurate operation make it suitable for a variety of applications.

LM4121IM5-ADJ Working Principle

The LM4121IM5-ADJ is a voltage reference circuit that uses a low-dropout (LDO) linear regulator to provide a stable & accurate output voltage. This device is designed with numerous features attractive to a variety of applications, but the primary function is to provide a precise voltage reference from an unregulated voltage source. This is achieved by using a band gap reference, which is comprised of a network of transistors to convert a physical quantity (such as temperature or current) into an electrical signal with a known and highly stable value.

When the input voltage is applied to the LM4121IM5-ADJ, the base-emitter voltages and resistances of the input transistors regulate the output voltage by controlling the current flow. The voltage across the output is maintained at a constant value due to the voltage reference generated from the band gap reference. The output voltage can be adjusted by applying a control voltage to the adjust pin. The LM4121IM5-ADJ is able to maintain a stable output voltage even with variations of input supply voltage and temperature.

Conclusion

In conclusion, the LM4121IM5-ADJ is a low-power voltage reference ideal for use in low-voltage applications. It is designed with a band gap reference circuit, which can provide a highly stable and accurate output voltage. Additionally, the voltage reference can be adjusted by applying a control voltage to the adjust pin. The LM4121IM5-ADJ is suitable for use in LED current controllers, voltage regulator circuits, industrial and telecommunication systems, and any other applications where stable voltage references are needed in harsh environments.

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