STMicroelectronics TL431ACL3T Adjustable Precision Shunt Regulator

The TL431ACL3T is a versatile, programmable precision shunt regulator developed by STMicroelectronics. This device is a three-terminal adjustable shunt regulator with a guaranteed thermal stability over applicable temperature ranges. The output voltage can be set to any value between Vref (approximately 2.495 V) and 36 V with two external resistors. This component is widely used in a variety of power supply and power management applications, offering flexibility and reliability for designers.

The device features a typical dynamic output impedance of 0.2 ohms. The active output circuitry provides a very sharp turn-on characteristic, making the TL431ACL3T an excellent replacement for zener diodes in many applications such as onboard regulation, adjustable power supplies, and switching power supplies.

The TL431ACL3T is supplied in a TO-92 package, which is well-suited for applications where space is at a premium. It operates over a wide current range of 1 mA to 100 mA with a typical dynamic impedance of 0.22 Ω, ensuring good regulation throughout the full range of current. The device is characterized for operation from -40°C to 125°C, making it suitable for a wide array of environments and applications.

Key features of the TL431ACL3T include:

• Adjustable output voltage from 2.495 V to 36 V
• Low dynamic output impedance: 0.2 ohms typical
• Sink current capability: 1 mA to 100 mA
• Typical output impedance of 0.22 Ω
• Fast turn-on response
• Operating temperature range: -40°C to 125°C

STMicroelectronics ensures that the TL431ACL3T meets rigorous standards for performance and reliability, making it a trusted choice for voltage regulation needs. Whether it's used in consumer electronics, automotive systems, or industrial controls, the TL431ACL3T provides a compact, efficient, and precise voltage regulation solution.

For detailed information on usage, application circuits, and setting resistor values, designers should refer to the official datasheets and application notes provided by STMicroelectronics.