The LM431BCM3 from Texas Instruments is a highly versatile, adjustable precision Zener shunt regulator that provides a reliable solution for voltage regulation needs across a broad range of applications. This three-terminal device operates as a precision 2.5V shunt regulator with the ability to adjust the voltage from 2.5V up to 36V by attaching two external resistors. The LM431BCM3 is available in a small SOT-23 package, making it ideal for space-constrained applications.

Key Features

• Voltage Range: The LM431BCM3 offers an adjustable output voltage range from 2.5V to 36V, providing flexibility for various design requirements.
• Reference Voltage Tolerance: At 25°C, the reference voltage tolerance is typically ±0.5%, ensuring precise voltage regulation for critical applications.
• Low Dynamic Output Impedance: The dynamic output impedance of 0.22 ohms (typical) contributes to stable voltage regulation, even with fluctuating loads.
• Temperature Compensated: This device is temperature compensated, which guarantees stable operation over a wide temperature range of -40°C to +85°C.
• Surface-Mount Package: The compact SOT-23 package is designed for automated assembly processes, making it suitable for high-volume production.

Applications

The LM431BCM3 is a versatile component that can be used in various applications, including:

• Adjustable voltage and current regulators
• Voltage monitoring
• Overvoltage and undervoltage protection
• Switch-mode power supplies (SMPS)
• Analog-to-digital and digital-to-analog converters
• Motor control circuits

Quality and Reliability

Texas Instruments is known for its commitment to quality and reliability. The LM431BCM3 shunt regulator is no exception, offering consistent performance and robustness that design engineers can rely on. With its precision voltage regulation and wide operating temperature range, the LM431BCM3 is a sound choice for systems that require a high degree of stability and accuracy.

For detailed technical specifications, application circuits, and additional information, designers are encouraged to consult the datasheet and Texas Instruments' support resources.