TL431 / TL432 – Adjustable Shunt Regulator IC – High Thermal Stability for Various Applications

Model: TL431 / TL432
Brand: Texas Instruments (TI)
Category: Voltage Regulator / Adjustable Shunt Regulator
Package Options: DBV, DBZ, PK

The TL431 and TL432 are adjustable shunt voltage regulators that allow for precise output voltage control between Vref (approximately 2.5V) and 36V using two external resistors. These devices have a typical output impedance of 0.2Ω and feature an active output circuit with distinct conduction characteristics, making them suitable for replacing Zener diodes in many applications, such as onboard regulators, adjustable power supplies, and switch-mode power supplies.

The TL432 has the same electrical characteristics and functionality as the TL431, but with different pinout configurations in the DBV, DBZ, and PK packages.

Key Features:

• Adjustable output voltage from 2.5V to 36V.

• 0.2Ω output impedance for stable voltage regulation.

• Suitable for automotive, commercial, and industrial applications.

• Available in B, A, and Standard grades with tolerance options of 0.5%, 1%, 2% at 25°C.

• Excellent thermal stability with low output temperature drift.

• Wide operating temperature range for different application needs:

  • TL43xxC: 0°C to 70°C

  • TL43xxI: –40°C to 85°C

  • TL43xxQ: –40°C to 125°C

These devices are ideal for applications requiring high precision and stability over a wide temperature range.