The TL431ACDR is a widely used adjustable precision shunt regulator from Texas Instruments (TI), designed for voltage regulation and reference applications. It provides a highly accurate reference voltage adjustable between 2.495V and 36V, making it ideal for power supplies, battery chargers, and other precision analog circuits. Its compact SOIC-8 package and low cost make it a popular choice for a wide range of industrial and consumer applications.

Key Features

• Precision reference: ±0.5% initial tolerance for accurate voltage regulation.
• Wide voltage range: Adjustable output from 2.495V to 36V with two external resistors.
• Low dynamic impedance: 0.2 Ω (typical) for stable performance under varying loads.
• Temperature stability: Operates reliably across 0°C to +70°C (commercial grade).
• High cathode current: Supports 1 mA to 100 mA operating range for flexibility.
• Fast response: Ensures quick regulation during transient load changes.
• Compact design: Small SOIC-8 package minimizes PCB space.

Common uses include power supply regulation, battery chargers, LED drivers, voltage monitoring, and analog circuit references. Its precision and adjustability make it suitable for secondary-side regulation in AC-DC converters, current limiting, and feedback control loops.

The TL431ACDR combines high accuracy, adjustable voltage regulation, and compact design, making it a versatile solution for precision analog and power management applications. Its reliability and ease of use ensure its widespread adoption in industrial, automotive, and consumer electronics requiring stable voltage references.