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ATL431

現行

2.5-V 低 IQ 可調整精密分流穩壓器

現在提供此產品的更新版本

open-in-new 比較替代產品
針腳對針腳的功能與所比較的裝置相同。
ATL431LI 現行 以超小型 DQN 封裝提供的低 IQ 可編程分流穩壓器 This pin-to-pin upgrade offers improved stability boundaries and lower reference input current to optimize voltage-output accuracy.
功能相同,但針腳輸出與所比較的裝置不同。
TL431 現行 可調整精密度分流穩壓器 for cost optimized designs

產品詳細資料

Rating Catalog VO (V) 2.5 Initial accuracy (max) (%) 0.5, 1 Iz for regulation (min) (µA) 20 VO adj (min) (V) 2.5 VO adj (max) (V) 36 Reference voltage (V) adjustable Temp coeff (max) (ppm/°C) 92 Operating temperature range (°C) -40 to 125 Iout/Iz (max) (mA) 100
Rating Catalog VO (V) 2.5 Initial accuracy (max) (%) 0.5, 1 Iz for regulation (min) (µA) 20 VO adj (min) (V) 2.5 VO adj (max) (V) 36 Reference voltage (V) adjustable Temp coeff (max) (ppm/°C) 92 Operating temperature range (°C) -40 to 125 Iout/Iz (max) (mA) 100
SOT-23 (DBZ) 3 6.9204 mm² (2.92 mm × 2.37 mm)
  • Adjustable Regulated Output of 2.5V to 36V
  • Very-Low Operating Current
    • IKA(min) = 35µA (Maximum)
    • IREF = 150nA (Maximum)
  • Internally Compensated for Stability
    • Stable With No Capacitive Load
  • Reference Voltage Tolerances at 25°C
    • 0.5% for B Grade
    • 1% for A Grade
  • Typical Temperature Drift
    • 5mV (–40°C to +85°C); I Version
    • 6mV (–40°C to +125°C); Q Version
  • Extended Cathode Current Range 35µA to 100mA
  • Low Output Impedance of 0.3Ω (Maximum)
  • Adjustable Regulated Output of 2.5V to 36V
  • Very-Low Operating Current
    • IKA(min) = 35µA (Maximum)
    • IREF = 150nA (Maximum)
  • Internally Compensated for Stability
    • Stable With No Capacitive Load
  • Reference Voltage Tolerances at 25°C
    • 0.5% for B Grade
    • 1% for A Grade
  • Typical Temperature Drift
    • 5mV (–40°C to +85°C); I Version
    • 6mV (–40°C to +125°C); Q Version
  • Extended Cathode Current Range 35µA to 100mA
  • Low Output Impedance of 0.3Ω (Maximum)

The ATL431 and ATL432 are three-terminal adjustable shunt regulators, with specified thermal stability over applicable automotive, commercial, and industrial temperature ranges. The output voltage can be set to any value between Vref (approximately 2.5V) and 36V, with two external resistors. These devices have a typical output impedance of 0.05Ω. 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.

The ATL43x has > 20x improvement cathode current range over its TL43x predecessor. It also is stable with a wider range of load capacitance types and values.

ATL431 and ATL432 are the exact same parts but with different pinouts and order numbers. The ATL43x is offered in two grades, with initial tolerances (at 25°C) of 0.5%, 1%, for the B and A grade, respectively. In addition, low output drift vs temperature ensures consistent voltage regulation over the entire temperature range.

The ATL43xxI devices are characterized for operation from –40°C to +85°C, and the ATL43xxQ devices are characterized for operation from –40°C to +125°C.

The ATL431 and ATL432 are three-terminal adjustable shunt regulators, with specified thermal stability over applicable automotive, commercial, and industrial temperature ranges. The output voltage can be set to any value between Vref (approximately 2.5V) and 36V, with two external resistors. These devices have a typical output impedance of 0.05Ω. 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.

The ATL43x has > 20x improvement cathode current range over its TL43x predecessor. It also is stable with a wider range of load capacitance types and values.

ATL431 and ATL432 are the exact same parts but with different pinouts and order numbers. The ATL43x is offered in two grades, with initial tolerances (at 25°C) of 0.5%, 1%, for the B and A grade, respectively. In addition, low output drift vs temperature ensures consistent voltage regulation over the entire temperature range.

The ATL43xxI devices are characterized for operation from –40°C to +85°C, and the ATL43xxQ devices are characterized for operation from –40°C to +125°C.

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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

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 ATL43x 2.5V Low Iq Adjustable Precision Shunt Regulator datasheet (Rev. E) PDF | HTML 2024/12/4
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 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
電子書 Tips and tricks for designing with voltage references (Rev. A) 2021/5/7
類比設計期刊 High-power, low-cost, discrete linear pre-regulator for automotive rear lights 2020/12/21
白皮書 Simplifying Signal Chain Design for High Performance in Small Systems 2020/10/22
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
電子書 Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 2019/6/28
應用說明 Diode-Based Temperature Measurements (Rev. A) 2019/5/17
技術文章 How to use a voltage reference as a voltage regulator PDF | HTML 2018/12/4
技術文章 The great compromise: voltage references PDF | HTML 2015/12/7
技術文章 Designing for isolated DC/DC converter shunt safety PDF | HTML 2015/8/29
技術文章 Can overcurrent protection be simple and precise, while minimizing cost? PDF | HTML 2015/7/31
技術文章 How to get no-load power savings in AC to DC supplies PDF | HTML 2015/6/8
應用說明 Designing with the Advanced TL431, ATL431 2015/1/8
應用說明 Designing Overcurrent protection for TPL7407L Peripheral Driver 2014/11/5

設計與開發

如需其他條款或必要資源,請按一下下方的任何標題以檢視詳細頁面 (如有)。

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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開發板

UCC28780EVM-002 — 具有 Gan FET 的 UCC28780 主動鉗位返馳 45W AC/DC EVM

UCC28780EVM-002 展示使用 UCC28780 主動箝位返馳控制器,在額定 300kHz 高頻下使用 GaN MOSFET 功率 IC NV6115 和 NV6117,實現 45W 離線轉換器的高效率和高密度。EVM 也在二次側使用 UCC24612 同步整流器控制器。在 90Vac 至 264Vac 的輸入電壓範圍內,輸出調節為 20Vdc。UCC28780 控制器可在數種適應性模式下運作,以將整個線路和負載範圍的功耗降到最低。

使用指南: PDF
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開發板

UCC28780EVM-021 — 具有 UCC24612 和 Si MOSFET 的 UCC28780 主動鉗位反馳式轉換器 45W EVM

UCC28780EVM-021 是一款 45-W 評估模組 (EVM),用於評估用於筆記型電腦充電和其他應用的離線主動箝位返馳式轉接器。該 EVM 符合 CoC Tier 2 與 DoE Level 6 的效率要求。它旨在用於評估目的,而不是最終產品。UCC28780EVM-021 可將 90-VRMS 至 264-VRMS 的輸入電壓向下轉換為 20-VDC,並具備 2.25-A 額定輸出電流額定值和 160-ms 過功率限制。此設計中使用的主要裝置為主動箝位返馳控制器 UCC28780,SR 控制器 UCC24612 及 Si MOSFET。

使用指南: PDF
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開發板

UCC28781EVM-053 — 適用於車用 500-Vdc 輸入 ZVS 返馳電源供應器應用的 UCC28781-Q1 評估模組

UCC28781EMV-053 展示了使用零電壓切換返馳 (ZVSF) 控制器的 60-W、15-V 輸出的高效率,高密度,高壓汽車偏壓電源。 UCC28781-Q1 直接驅動一次側矽 MOSFET,並透過 UCC5304 絕緣式閘極驅動器驅動二次側同步整流器,以提升效率並達到 ZVS。

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模擬型號

ATL431A PSpice Transient Model (Rev. D)

SLVMAT0D.ZIP (51 KB) - PSpice 模型
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模擬型號

ATL431A TINA-TI TRANSIENT REFERENCE DESIGN

SLVMD61.TSC (753 KB) - TINA-TI 參考設計
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模擬型號

ATL431A TINA-TI TRANSIENT SPICE MODEL

SLVMD60.ZIP (8 KB) - TINA-TI Spice 模型
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模擬型號

ATL431A Unencrypted PSpice Transient Model (Rev. B)

SLVMBJ2B.ZIP (2 KB) - PSpice 模型
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模擬型號

ATL431B PSpice Transient Model (Rev. C)

SLVMAS9C.ZIP (58 KB) - PSpice 模型
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模擬型號

ATL431B Unencrypted PSpice Transient Model

SLVMBN7.ZIP (1 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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計算工具

SHUNT_VOLTAGE_REFERENCE_RESISTOR_CALCULATOR — Shunt Voltage Reference External Resistor Quick Start Calculator

此外部電阻快速入門計算機工具可讓您輕鬆計算相對電壓參考、電源供應和負載電流限制的有效外部電阻值。透過這些輸入,您可以立即查看計算結果,並使用顏色編碼指示來了解計算出的輸出是有效或無效值。

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許多 TI 參考設計包含 ATL431

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

訂購與品質

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若有關於品質、封裝或訂購 TI 產品的問題,請參閱 TI 支援。​​​​​​​​​​​​​​

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