TL432LI
- Reference Voltage Tolerance at 25°C
- 0.5% (B Grade)
- 1% (A Grade)
- Minimum Typical Output Voltage: 2.495 V
- Adjustable Output Voltage: Vref to 36 V
- Operation From −40°C to +125°C (Q Temp)
- Maximum Temperature Drift
- 10 mV (C Temp)
- 17 mV (I Temp)
- 27 mV (Q Temp)
- 0.3-Ω Typical Output Impedance
- Sink-Current Capability
- Imin = 1 mA (max)
- IKA = 15 mA (max)
- Reference Input Current IREF: 0.4 µA (max)
- Deviation of Reference Input Current over Temperature, II(dev): 0.3 µA (max)
The TL431LI device is a three-terminal adjustable shunt regulator, with specified thermal stability over applicable automotive, commercial, and military temperature ranges. The output voltage can be set to any value between Vref (approximately 2.495 V) and 36 V, with two external resistors. These devices have a typical output impedance of 0.3 Ω. Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacements for Zener diodes in many applications, such as onboard regulation, adjustable power supplies, and switching power supplies. This device is a pin-to-pin alternative to the industry standard TL431, with optimized Iref and IIdev performance. The lower Iref and IIdev values enable designers to achieve higher system accuracy and lower leakage current. The TL432LI device has exactly the same functionality and electrical specifications as the TL431LI device, but has a different pinout for the DBZ package.
The TL431LI device is offered in two grades, with initial tolerances (at 25°C) of 0.5% and 1%, for the B and A grade, respectively. In addition, low output drift versus temperature ensures good stability over the entire temperature range.
The TL43xLIxQ devices are characterized for operation from –40°C to 125°C.
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 | TL431LI / TL432LI Programmable Shunt Regulator with Optimized Reference Current datasheet (Rev. A) | PDF | HTML | 2018/11/12 | ||
| 應用說明 | Precision Current Sources and Sinks Using Voltage References (Rev. A) | PDF | HTML | 2026/4/15 | |||
| 應用說明 | Voltage Reference Selection and Design Tips For Data Converters (Rev. B) | PDF | HTML | 2024/1/9 | |||
| 應用說明 | Using the TL431 for Undervoltage and Overvoltage Detection (Rev. A) | 2019/12/11 | ||||
| 選擇指南 | 431 Device Nomenclature (Rev. B) | 2019/9/18 | ||||
| 應用說明 | Designing With the Improved TL431LI (Rev. A) | 2019/6/28 | ||||
| 電子書 | Voltage Supervisor and Reset ICs: Tips, Tricks and Basics | 2019/6/28 |
設計與開發
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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-23 (DBZ) | 3 | Ultra Librarian |