TL431 Integrated Circuit Voltage Reference

The TL431 in a TO‑92 package is a versatile, three‑terminal adjustable shunt regulator designed for precision voltage control and thermal stability across a wide temperature range. It delivers an average output impedance around 0.2 Ω and operates reliably from 1.0 mA to 100 mA, making it a trusted choice for power supplies, references, and feedback loops in both professional designs and DIY builds. Ideal for microcontroller projects, this component is breadboard‑friendly and easy to integrate into electronics modules and circuits.

🔧 Key Features

• Adjustable output voltage for flexible regulation and reference designs
• Minimal output noise for clean, stable references in sensitive circuits
• 0.2 Ω typical output dynamic impedance for tight load regulation
• Wide operating current range from 1.0 mA to 100 mA
• Superior temperature stability across industrial ranges
• Low output temperature coefficient for precision over temperature

📋 Technical Specifications

• Output Voltage Range: 2.5 V to 36 V
• Operating Current Range: 1.0 mA to 100 mA
• Output Impedance: 0.22 Ω (typical)
• Operating Temperature Range: −40°C to +125°C
• Package Type: TO‑92

🔌 Typical Applications

• Voltage regulation in power supply applications
• Current source and sink configurations
• Error amplifier in switch‑mode power supplies (SMPS)
• Adjustable voltage reference for ADCs, DACs, and precision circuits

💡 Integration Tips for Microcontroller Projects

• Use as a precision reference for sensor interfaces and ADC measurements.
• Maintain at least 1.0 mA through the device for proper regulation.
• Ensure the cathode‑to‑anode voltage remains within 2.5 V to 36 V.
• For stable control loops, follow recommended compensation practices from the device datasheet.
• Place the device and its feedback network close together to minimize noise and improve stability.

Whether you’re building a precision electronics component test rig or refining a compact module for embedded systems, the TL431 TO‑92 offers dependable performance, ease of use, and proven reliability. ✅