The TLA431 and TLA432 devices are three-terminal adjustable shunt regulators that are stable with all capacitor loads. The devices are pin compatible with the industry standard TL431 and TL432 but with improved stability to support all capacitor loads. The output cathode voltage can be set to any value between Vref (2.495V) and 36V, with two external resistors. These devices have a typical output impedance of 0.2Ω. Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacements for Zener diodes in many applications, such as on-board regulation, adjustable power supplies, and switching power supplies. The TLA431 also functions as a comparator for undervoltage monitoring. The internal amplifier and reference of the TLA431 is used an error amplifier in isolated optocoupler flyback power supplies. The TLA432 device has exactly the same functionality and electrical specifications as the TLA431 device.
The TLA431 and TLA432 devices are specified in two temperature grades, I and Q. In addition, the devices offer good stability reference voltage over the entire temperature range.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | TLA431, TLA432 All-Capacitor Stable Precision Programmable Reference datasheet (Rev. D) | PDF | HTML | Jun 4, 2026 |
| Application note | Precision Current Sources and Sinks Using Voltage References (Rev. A) | PDF | HTML | Apr 15, 2026 | |
| Certificate | TLA431EVM EU Declaration of Conformity (DoC) | Sep 8, 2025 |
For additional terms or required resources, click any title below to view the detail page where available.
The ATL431EVM-001 evaluation module (EVM) features the functionality and adjustability of the ATL431 by letting you program the cathode voltage with various resistor values. You can also set the cathode current using the various resistors in series with the supply. (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SOT-5X3 (DRL) | 6 | Ultra Librarian |
| SOT-23 (DBZ) | 3 | Ultra Librarian |
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