SPX431LM1-L/TR

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PMIC (Power Management Integrated Circuit), also known as power management unit, is an integrated circuit that helps to manage power distribution within a circuit. Voltage reference, one of the major components of PMIC, helps to ensure precise voltage output during the entire operating cycle of a circuit. In this article, we will discuss the application field and working principle of the SPX431LM1-L/TR voltage reference.

The SPX431LM1-L/TR is a high-precision and low-dropout linear voltage reference, developed by STMicroelectronics. This voltage reference can be used in applications ranging from consumer electronics to instrumentation, power supplies and automotive industry. It has a typical 1.249 V reference output voltage, an operating current range of 1 µA to 10 mA, an operating temperature range of -40 °C to 125 °C and an input voltage range of 1.8 V to 5.5 V.

The SPX431LM1-L/TR features a unique architecture, based on an ultra low-noise voltage reference source consisting of a precision bandgap reference and a high-gain error amplifier. This configuration allows for a precise and stable reference voltage over a wide temperature range. Additionally, the built-in current limiting and thermal protection functions ensure safe operation in extreme conditions.

When using this device, the user first sets the operating current limit, and then supplies the voltage source to the input pin. The reference voltage output can then be taken from the output pin. For example, in a power supply application, the desired operating current limit is set using the operating current setting pins. When the voltage source is supplied to the SPX431LM1-L/TR, it will output a precise 1.249 V reference voltage.

In conclusion, the SPX431LM1-L/TR voltage reference is a powerful and efficient device that offers high precision and stable voltage reference. It is suitable for a wide range of applications, including consumer electronics, instrumentation, power supplies and automotive industry. It features an ultra low-noise voltage reference source, as well as built-in current limiting and thermal protection functions, ensuring safe operation in extreme conditions.

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