The LM431ACZ/NOPB is a precision shunt voltage reference from Texas Instruments, renowned for its stability and accuracy in a wide array of electronic applications. This adjustable shunt regulator operates over a nominal voltage range of 2.5 V to 36 V and is available in a TO-92 package. It is designed to be versatile, serving as a replacement for zener diodes in many applications due to its lower impedance and improved temperature stability.

Key Features

• Adjustable Output Voltage: The device can be set to any value between 2.5 V and 36 V with two external resistors.
• High Accuracy: Features a typical output voltage tolerance of ±0.5% at 25°C, ensuring precise voltage regulation for sensitive circuits.
• Low Temperature Coefficient: Boasts a temperature coefficient typically less than 0.002% per °C, providing stable performance over a wide temperature range.
• Low Dynamic Output Impedance: The dynamic impedance of the output is typically 0.22 ohms, which is a significant improvement over standard zener diodes.
• Wide Operating Current Range: Capable of operating from 1 mA to 100 mA, which makes it flexible for various current requirements.

Applications

The LM431ACZ/NOPB is suitable for a broad spectrum of applications, including:

• Adjustable voltage and current regulators
• Voltage monitoring
• Precision current limiters
• Digital voltmeters
• Op-amp circuitry
• Switching power supplies

Quality and Reliability

This product is supplied in a "green" mold compound as part of Texas Instruments' commitment to environmental sustainability. The LM431ACZ/NOPB is lead-free and RoHS compliant, ensuring adherence to current environmental standards and regulations. It also comes with the NOPB (no lead (Pb)) designation, indicating that it is manufactured without the use of lead, which is beneficial for both the environment and consumer health.

With its high performance, reliability, and versatility, the LM431ACZ/NOPB is an excellent choice for designers looking for an adjustable precision voltage reference solution.