Overview of Texas Instruments TL431BID Precision Shunt Regulator

The Texas Instruments TL431BID is a three-terminal adjustable shunt regulator offering excellent temperature stability and output current handling capability. With a nominal voltage reference of 2.495 volts, the device features a typical dynamic output impedance of 0.2 ohms. The output voltage can be set to any value between Vref (approximately 2.5 volts) and 36 volts with the use of two external resistors. These characteristics make the TL431BID a versatile component suitable for a wide range of power supply and voltage regulation applications.

Key Features

• Voltage Reference: A precise 2.495 V reference voltage serves as the starting point for adjustability, providing a stable foundation for regulation.
• Adjustability: Users can set the output voltage from Vref to 36 V by selecting suitable external resistors, offering flexibility in design.
• Low Dynamic Output Impedance: The low impedance of 0.2 ohms ensures minimal voltage variation under different load conditions, contributing to stable performance.
• Temperature Stability: With a range of −40°C to +125°C, the TL431BID maintains reliable operation across a broad temperature spectrum.
• Output Current: Capable of sourcing up to 100 mA with a typical sink current capability of 1-100 mA, it can be used in a variety of applications.

Applications

The TL431BID is suitable for numerous applications, including:

• Adjustable voltage and current regulators
• Switching power supplies
• Linear power supplies
• System monitoring and control
• Comparator with an integrated reference

Package and Quality

The device is offered in an 8-pin SOIC package, known for its small footprint and suitability for high-density circuit designs. Texas Instruments is committed to high standards of quality and reliability, ensuring that the TL431BID meets stringent industry requirements for performance and durability.

In summary, the TL431BID from Texas Instruments is a highly reliable and versatile shunt regulator that provides designers with a solution for stable voltage regulation in a compact, surface-mountable form factor.