ON Semiconductor TL431BC Adjustable Precision Shunt Regulator

The TL431BC from ON Semiconductor is a three-terminal adjustable shunt regulator with specified thermal stability over applicable automotive, commercial, and military temperature ranges. This versatile device acts as a precision voltage reference and a regulator, capable of being programmed from the reference voltage of 2.495 volts up to 36 volts with two external resistors.

This IC features a typical dynamic output impedance of 0.2 ohms, providing excellent regulation against load variations. It is widely used in a multitude of applications, ranging from power supplies to voltage monitors and motor controllers, due to its flexibility and accuracy.

Key features of the TL431BC include:

• Programmable Output Voltage: It can be set to any value between Vref (approximately 2.495V) and 36V with the use of two external resistors.
• Low Output Noise: This device boasts a low noise characteristic, making it suitable for precision applications.
• High Stability: The TL431BC is guaranteed to have stability over the entire temperature range, ensuring reliable performance under varying conditions.
• Low Dynamic Output Impedance: The 0.2 ohm typical impedance ensures effective regulation against fluctuations in load, which is critical for maintaining a stable voltage supply.
• Surface Mount and Through-Hole Packages: Available in multiple package options, including the popular TO-92, SO-8, and SOT-23, providing flexibility for different types of circuit board designs.

The TL431BC is designed for easy implementation and can be incorporated into a variety of circuit configurations. It is commonly utilized as a replacement for zener diodes in many applications requiring an improvement in zener performance. With its high accuracy and stability, the TL431BC is an essential component for designers looking to create a reliable and precise voltage regulation system.

Whether you're designing a power supply or looking to create a custom voltage reference, the TL431BC from ON Semiconductor offers a high-quality solution that combines flexibility with performance.