STMicroelectronics TL431 Adjustable Shunt Voltage Reference, 2.495V to 36V, TO-

The STMicroelectronics TL431 series is a precision, programmable shunt voltage reference designed for stability and versatility in electronic circuits. Its key feature is the guaranteed temperature stability across the entire specified operating temperature range, ensuring reliable performance under varying environmental conditions. The output voltage is easily programmable using two external resistors, allowing it to be set to any precise value between 2.495V and 36V. This makes it an exceptionally flexible component for a wide array of design applications.

This device operates effectively across a broad cathode current range from 1mA to 100mA, exhibiting a low typical dynamic impedance of just 0.22Ω. This combination supports stable voltage referencing even with fluctuating load conditions. The component is packaged in a robust TO-226AA (TO-92) through-hole case, making it suitable for both prototyping and production use where manual or wave soldering is employed.

Key Features & Applications

• Adjustable Precision: Programmable output via external resistors for custom voltage thresholds.
• Wide Operational Range: Supports input voltages up to 36V and functions from 0°C to 70°C.
• Stable Performance: Features low dynamic impedance and assured temperature stability for consistent referencing.
• Common Uses: Ideal for use in switch-mode power supplies, voltage regulators, precision comparators, and as a replacement for zener diodes in circuits requiring a more accurate and adjustable reference voltage.

With its proven design and robust specifications, the TL431 provides a dependable, cost-effective solution for generating stable reference voltages in analogue and power supply circuits.