TLA431
- No output capacitor required
- Stable with all capacitive loads
- Reference voltage tolerance at 25°C
- 1% (A grade)
- 0.5% (B grade)
- Adjustable output voltage: Vref to 36V
- Operation from −40°C to 125°C
- Typical temperature drift (TLA43xA)
- 8mV (I temperature)
- 11mV (Q temperature)
- Low output noise
- Typical output impedance: 0.2Ω
- Sink-current capability: 0.2mA to 100mA
- Pin-compatible with industry-standard TL431 and TL432
- Available in ultra-small DRL package
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.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | TLA431, TLA432 All-Capacitor Stable Precision Programmable Reference datasheet (Rev. D) | PDF | HTML | 2026/6/4 | ||
| 應用說明 | Precision Current Sources and Sinks Using Voltage References (Rev. A) | PDF | HTML | 2026/4/15 | |||
| 證書 | TLA431EVM EU Declaration of Conformity (DoC) | 2025/9/8 |
設計與開發
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ATL431EVM-001 — ATL431 可調整分流穩壓器評估模組
ATL431EVM-001 評估模組 (EVM) 展示 ATL431 的功能與可調整性，讓您可使用各種電阻值對陰極電壓編程。您也可以使用與電源串聯的各種電阻來設定陰極電流。除了 EVM 上提供的電阻器外，您還可以將電阻焊接至電路板上，以根據您的應用自訂電路板。此 EVM 讓您可以透過跳線在陽極與陰極之間應用超過 12 個輸出電容，藉此檢查 ATL431 的穩定性。此 EVM 也相容於採用 SOT23-3 封裝的 TL431、TL431LI、ATL431LI、LM431 與 TLVH432 產品。
SHUNT-REFERENCE-CALC — Shunt Reference Selector and Design Calculator
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-5X3 (DRL) | 6 | Ultra Librarian |
| SOT-23 (DBZ) | 3 | Ultra Librarian |