The TL431IPK3 is a three-terminal adjustable shunt regulator from Texas Instruments (TI). It has precision current regulation, high accuracy voltage regulation, and precise temperature compensation. It is available in the SOT-23 package and has an accuracy of ±2%. Additionally, it has under-voltage lockout, current limit, line and load regulation, temperature stability, current limit, and anti-icing protection. This shunt regulator is suitable for medical, industrial, and consumer applications.