The TL431B from Texas Instruments is a versatile and precision programmable voltage reference that can be set to any value between Vref (approximately 2.495 volts) and 36 volts with the use of two external resistors (R1 and R2). This integrated circuit (IC) is widely used in a variety of applications due to its flexibility and accuracy. The TL431B is often found in power supplies, battery chargers, and voltage monitoring circuits, serving as a reliable reference or shunt regulator.

Key Features

• Adjustable Output: Voltage can be precisely adjusted to a desired value within its range.
• Low Output Noise: Ensures stable and reliable operation in sensitive applications.
• Temperature Compensated: Features a wide operating temperature range with minimal deviation in output voltage.
• Low Dynamic Output Impedance: Provides stable reverse breakdown voltage which is critical for regulation purposes.
• Tolerance: The TL431B variant offers a 0.5% tolerance, making it suitable for precision applications.

Applications

• Adjustable voltage and current regulation
• Switching power supply control
• Overvoltage and undervoltage protection
• Analog-to-digital and digital-to-analog converters
• Peak detection and signal conditioning

Package Options and Ratings

The TL431B is available in multiple package options, including the small-outline transistor (SOT-23), 8-pin small-outline integrated circuit (SOIC), and through-hole TO-92 configurations, making it suitable for both surface-mount and through-hole PCB designs. It is characterized for operation from -40°C to 85°C, ensuring reliable performance across a wide range of environmental conditions.

Quality and Reliability

Texas Instruments is known for its commitment to quality, and the TL431B is no exception. This product is designed and manufactured to meet the stringent requirements of the industrial and consumer markets, ensuring high reliability and performance consistency across your applications.