The TL431AQPK from Texas Instruments is a three-terminal adjustable shunt regulator with specified thermal stability over applicable automotive, commercial, and military temperature ranges. This versatile device acts as a precision voltage reference and a regulator, capable of sinking a wide range of currents while maintaining a stable voltage level.

The output voltage can be set to any value between Vref (approximately 2.495 V) and 36 V with two external resistors. This regulator features a typical dynamic output impedance of 0.2 ohms. Active output circuitry provides a very sharp turn-on characteristic, making the TL431AQPK excellent for use in a variety of applications that require a stable and precise voltage reference.

Key features of the TL431AQPK include a low output noise voltage, fast turn-on response, and the ability to operate with a wide range of currents from 1 mA to 100 mA. This makes it a flexible choice for power supply circuits. The device's performance is assured through a rigorous testing regimen, with every device subjected to a burn-in process to guarantee reliability.

Available in a small outline package (PK), the TL431AQPK is suitable for automated surface mount assembly processes and is RoHS compliant. Its compact form factor and high level of precision make it a popular choice for power supply designers who require a high-quality voltage reference and regulator that occupies minimal board space.

Whether you're designing a power supply for consumer electronics, automotive applications, or sophisticated military hardware, the TL431AQPK provides the performance and reliability expected from a leading semiconductor manufacturer like Texas Instruments.