Texas Instruments

TL431IP

TL431IP Description

The TL431IP from Texas Instruments is a precision adjustable shunt voltage reference integrated circuit (IC) packaged in an 8-pin DIP (Through Hole) configuration. Designed for 2.495V to 36V output voltage range, it offers ±2.2% tolerance for high-accuracy applications. With a 100mA output current capability and 1mA cathode current, this IC is optimized for stability and efficiency in voltage regulation. Though marked as Obsolete, it remains ROHS3 Compliant and REACH Unaffected, making it suitable for legacy designs requiring compliance with environmental standards. Its shunt reference topology allows flexible integration into various circuits, particularly where precise voltage control is critical.

TL431IP Features

• Adjustable Output Voltage: Programmable from 2.495V to 36V via external resistors.
• High Accuracy: ±2.2% tolerance ensures reliable performance in precision applications.
• Robust Output Current: Supports up to 100mA, ideal for driving loads directly.
• Low Cathode Current: Operates efficiently with just 1mA, reducing power dissipation.
• Wide Operating Range: Suitable for industrial and automotive environments with demanding voltage requirements.
• Through-Hole Package: 8DIP form factor simplifies prototyping and legacy system integration.
• Compliance: Meets ROHS3 and REACH standards, ensuring environmental safety.

TL431IP Applications

The TL431IP excels in:

• Voltage Regulation: Used in switch-mode power supplies (SMPS) and linear regulators for stable reference voltages.
• Overvoltage Protection: Integrated into circuits to clamp or monitor excessive voltages.
• Battery Chargers: Provides precise voltage thresholds for charging control.
• Industrial Control Systems: Ensures accuracy in sensor interfaces and ADC/DAC reference circuits.
• Automotive Electronics: Reliable performance in ECUs and infotainment systems where voltage stability is critical.

Conclusion of TL431IP

The TL431IP is a versatile, high-precision shunt voltage reference IC, offering adjustability, accuracy, and robust current handling. While obsolete, its compliance with modern environmental standards and through-hole packaging make it a practical choice for legacy designs, repairs, or applications requiring dependable voltage regulation. Its wide voltage range and low power operation solidify its role in power management, industrial, and automotive systems. For engineers seeking a proven, stable reference solution, the TL431IP remains a compelling option.