TL431BIDR TI Voltage Reference

The TL431BIDR is a three-terminal adjustable precision shunt regulator from Texas Instruments, offering a programmable output voltage from 2.495V up to 36V with ±0.5% initial accuracy and 100mA sink current capability. Verify cathode current between 1mA and 100mA; confirm output voltage set via two external resistors using Vref = 2.495V; note typical output impedance of 0.2Ω; ensure operating temperature from -40°C to 85°C; observe minimum cathode current requirement of 700µA for regulation. Ideal for switch-mode power supply feedback (opto-coupler drivers), precision voltage references for ADCs/DACs, shunt regulators replacing zener diodes, overvoltage protection circuits, constant current sources/sinks, and low-cost adjustable power supplies in industrial control, battery chargers, and consumer electronics. In stock at HL Electronics – request a quote for fast delivery.