ATL432
- 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.
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 | 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 | |||
| 電子書 | Tips and tricks for designing with voltage references (Rev. A) | 2021/5/7 | ||||
| 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 | ||||
| 技術文章 | Designing for isolated DC/DC converter shunt safety | PDF | HTML | 2015/8/29 |
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-23 (DBZ) | 3 | Ultra Librarian |