The TL431CDR from Texas Instruments is a three-terminal adjustable shunt regulator with specified thermal stability over applicable automotive, commercial, and military temperature ranges. This integrated circuit is available in an 8-pin SOIC package, known for its compact footprint and suitability for automated assembly processes.

With an output voltage range that can be set to any value between Vref (approximately 2.495 V) and 36 V with two external resistors, this device provides excellent flexibility for voltage regulation tasks. Its low output noise, combined with a high level of accuracy and stability, makes it an ideal choice for precision voltage regulation in a wide variety of applications, including power supplies, battery chargers, and voltage monitors.

Key Features:

• Voltage Reference: The TL431CDR features a typical reference voltage of 2.495 V, which can be adjusted from 2.495 V to 36 V with the use of external resistors.
• Temperature Stability: The device offers exceptional temperature stability over its entire operating temperature range, ensuring reliable performance under varying environmental conditions.
• Low Dynamic Output Impedance: The dynamic output impedance of the TL431CDR is typically 0.22 Ω, which contributes to stable output voltage despite load variations.
• Fast Turn-on Response: This regulator provides a quick response to enable signals, making it suitable for applications that require fast power-up sequences.
• Package: Supplied in an 8-pin SOIC package, the TL431CDR is designed for surface-mount technology, which allows for efficient use of PCB space and compatibility with modern manufacturing processes.

The TL431CDR's performance is characterized for operation from −40°C to 125°C, which makes it suitable for use in a variety of challenging environments. Its typical output noise voltage of 0.4 μV/V at 10 Hz to 10 kHz ensures a low-noise operation, which is critical for sensitive electronics. Additionally, the device is capable of sourcing or sinking up to 100 mA of output current, providing ample drive capability for a shunt regulator.

With its combination of features and reliable performance, the TL431CDR from Texas Instruments stands out as a versatile component for designers seeking a precision voltage reference solution.