TL431LI-Q1
- Qualified for automotive applications
- AEC-Q100 qualified with the following
results:
- Device temperature grade 1: –40°C to +125°C ambient operating temperature
- Device temperature grade 0: –40°C to +150°C ambient operating temperature
- 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
- 27 mV maximum temperature drift for grade 1
- 34 mV maximum temperature drift for grade 0
- 0.3-Ω typical output impedance
- Sink-current capability
- Imin = 0.6 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-Q1 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. The device has a typical output impedance of 0.3 Ω. Its active output circuitry provides a very sharp turn-on characteristic, making it an excellent replacement 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-Q1 with optimized Iref and IIdev performance. The lower Iref and IIdev values of the TL431LI-Q1 enable designers to achieve higher system accuracy and lower leakage current. The TL432LI-Q1 has exactly the same functionality and electrical specifications as the TL431LI-Q1, but has a different pinout for the DBZ package.
The TL431LI-Q1 is offered in two grades, with initial tolerances (at 25°C) of 0.5% and 1%, for the B and A grade, respectively. The TL431LI-Q1 is also available in two temperature grades: grade 1 (denoted by a ’Q’ in the part number), and grade 0 (denoted by a ’E’ in the part number), which represent maximum ambient operating temperatures of 125°C and 150°C respectively. The TL43xLI-Q1 is characterized for operation from –40°C to 125°C for grade 1, and –40°C to 150°C for grade 0, and its low output drift versus temperature ensures good stability 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 | TL431LI-Q1 / TL432LI-Q1 Programmable Shunt Regulator With Optimized Reference Current datasheet (Rev. A) | PDF | HTML | 2019/11/14 | ||
| 應用說明 | Precision Current Sources and Sinks Using Voltage References (Rev. A) | PDF | HTML | 2026/4/15 | |||
| 技術文章 | 確定您的光耦合器具有正確偏壓 | PDF | HTML | Download English Version | PDF | HTML | 2024/3/20 | |
| 類比設計期刊 | High-power, low-cost, discrete linear pre-regulator for automotive rear lights | 2020/12/21 | ||||
| 功能安全資訊 | TL43xLI-Q1 Functional Safety FIT Rate and Failure Mode Distribution | 2019/12/18 | ||||
| 應用說明 | Current Supply Monitoring with the TL431LI-Q1 | 2019/10/7 | ||||
| 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 | ||||
| 應用說明 | Implementing Voltage References and Supervisors Into Your Traction Inverter Desi | 2019/5/22 |
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 |