LM431ACZX

PMIC - Voltage Reference

The LM431ACZ is a three-terminal adjustable shunt regulator that is precision-designed to provide an accurate reference voltage at the output that is accurately programmable. It is commonly used by designers of power supplies, digital-to-analog converters, processors, and data acquisition systems, and it operates over a wide range of power supplies, has extended temperature range and enhanced stability characteristics. The LM431ACZ is an improved version of the popular LM431 series, and it is offered in a wide selection of general-purpose packages.

The LM431ACZ is used to set the output voltage of a power supply, and to provide an accurate reference for designing circuits with a variety of voltage ranges. In addition to its primary use as a voltage reference, the LM431ACZ can be used for precision temperature compensation of active electronics. The temperature coefficient of the LM431ACZ is very low, making it an ideal choice for applications requiring temperature stability.

The LM431ACZ consists of an adjustable-bias three-terminal shunt regulator. This regulator is designed for both current and voltage adjustments, allowing for accurate and consistent voltage levels over a wide range of temperatures. The regulator is constructed with a voltage reference connected across its emitter and collector terminals, and the base terminal is internally adjusted to provide the output voltage. The base current is then adjusted on the negative input to apply an error correction current, which is then added to or subtracted from the reference voltage, thereby adjusting the output voltage. This current-adjustable output provides a temperature-stable reference voltage that is very advantageous in a variety of applications.

The LM431ACZ has excellent line regulation, low temperature drift, wide temperature range, and low noise and is a high-precision voltage reference. It is suitable for use in voltage regulation, data acquisition, power supplies, digital-to-analog converters, processors, video circuits and other applications.

The LM431ACZ operates over a wide range of input voltages and can handle both positive and negative input voltages of up to 25 volts, allowing for equipment to operate at a variety of input voltages without needing to be adjusted. The input current is adjustable, allowing for improved stability and more accurate voltage control compared to fixed resistors. The LM431ACZ also has a maximum output current rating of 200 mA, making it suitable for many applications.

The LM431ACZ is a versatile and highly accurate voltage reference, with its compact size, wide operating temperature range and excellent performance making it suitable for a variety of applications. It is a great tool for designing power supplies, processors, data acquisition systems, and other industrial and medical applications.