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TL431LI

現行

具有最佳化參考電流的可調整精密分流穩壓器 (針腳配置：KRA)

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產品規格表

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TLA431 現行 具有 KRA 接腳配置的所有電容器穩定精密可編程參考 Improved to all load cap stability, improved temperature drift, decreased minimum cathode current

TL431LI

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog VO (V) 2.495 Initial accuracy (max) (%) 0.5, 1 Iz for regulation (min) (µA) 400 VO adj (min) (V) 2.495 VO adj (max) (V) 36 Reference voltage (V) adjustable Temp coeff (max) (ppm/°C) 63 Operating temperature range (°C) -40 to 125 Iout/Iz (max) (mA) 15
Rating Catalog VO (V) 2.495 Initial accuracy (max) (%) 0.5, 1 Iz for regulation (min) (µA) 400 VO adj (min) (V) 2.495 VO adj (max) (V) 36 Reference voltage (V) adjustable Temp coeff (max) (ppm/°C) 63 Operating temperature range (°C) -40 to 125 Iout/Iz (max) (mA) 15
SOT-23 (DBZ) 3 6.9204 mm² (2.92 mm × 2.37 mm)
  • 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)
  • 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.

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.
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技術文件

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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
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
應用說明 Voltage Reference Selection and Design Tips For Data Converters (Rev. B) PDF | HTML 2024/1/9
應用說明 Optimization of a Shunt Reference for Flyback Converters PDF | HTML 2023/10/18
應用說明 Designing Stable Isolated Power Supplies with Shunt Regulators PDF | HTML 2022/12/29
應用說明 IEEE 802.3cg 10BASE-T1L Power over Data Lines Powered Device Design (Rev. A) PDF | HTML 2022/6/2
應用說明 Voltage and Processor Monitoring Solutions in Factory Automation and Control App (Rev. A) 2021/8/5
類比設計期刊 High-power, low-cost, discrete linear pre-regulator for automotive rear lights 2020/12/21
技術文章 How modern voltage references help shrink small designs PDF | HTML 2020/6/1
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
Application brief An Isolated 24 V Power Supply Window Monitor 2019/8/1
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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開發板

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。

使用指南: PDF
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模擬型號

TL431LI and ATL431LI PSpice Average Model

SLVMCX5.ZIP (78 KB) - PSpice 模型
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模擬型號

TL431LI and ATL431LI Unencrypted PSpice Average Model

SLVMCX4.ZIP (1 KB) - PSpice 模型
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模擬型號

TL431LI PSpice Transient Model

SLVMCW2.ZIP (56 KB) - PSpice 模型
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模擬型號

TL431LI Unencrypted PSpice Transient Model

SLVMCW1.ZIP (2 KB) - PSpice 模型
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計算工具

SHUNT-REFERENCE-CALC — Shunt Reference Selector and Design Calculator

This tool guides the user through the design process for the TLx431 and LM40x0 family of shunt voltage references. This calculator will recommend resistance and capacitance values to optimally meet the user's desired specifications.
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許多 TI 參考設計包含 TL431LI

使用我們的參考設計選擇工具，以檢視並找出最適合您的應用和參數的設計。
封裝 針腳 CAD 符號、佔位空間與 3D 模型
SOT-23 (DBZ) 3 Ultra Librarian
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