ATL431LI
- Reference voltage tolerance at 25°C
- 0.5% (B Grade)
- 1% (A Grade)
- Minimum typical output voltage: 2.5 V
- Adjustable output voltage: Vref to 36 V
- Operation from −40°C to +125°C (Q temp)
- Maximum temperature drift
- 17 mV (I Temp)
- 27 mV (Q Temp)
- 0.3-Ω Typical output impedance
- Sink-current capability
- Imin = 0.08 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)
- Packages: 1-mm x 1-mm X2SON or SOT23-3
The ATL43xLI 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 2.5 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 TL431LI and TL432LI, with lower minimum operating current to help reduce system power consumption. The ATL432LI device has exactly the same functionality and electrical specifications as the ATL431LI device, but has a different pinout for the DBZ package. The ATL431LI is also offered in a tiny X2SON (1.00 mm x 1.00 mm) package which makes it ideal for space constraint applications.
The ATL431LI 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 ATL43xLIxQ devices are characterized for operation from –40°C to +125°C.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | ATL431LI / ATL432LI High Bandwidth Low-Iq Programmable Shunt Regulator 数据表 (Rev. D) | PDF | HTML | 2019-11-21 | ||
| 应用手册 | 使用电压基准的精密电流源和电流阱 | PDF | HTML | PDF | HTML | 2026-4-20 | ||
| 技术文章 | 确保光耦合器正确偏置 | PDF | HTML | 英语版 | PDF | HTML | 2024-3-8 | |
| 应用手册 | 反激式转换器并联基准的优化 | PDF | HTML | 英语版 | PDF | HTML | 2023-10-19 | |
| 应用手册 | Designing Stable Isolated Power Supplies with Shunt Regulators | PDF | HTML | 2022-12-29 | |||
| 应用手册 | 隔离式转换器次级反馈环路的并联稳压器设计流程 | 英语版 | PDF | HTML | 2021-11-8 | ||
| 模拟设计期刊 | 用于汽车后灯的大功率、低成本、离散线性预调节器 | 英语版 | 2021-1-29 | |||
| 技术文章 | How modern voltage references help shrink small designs | PDF | HTML | 2020-6-1 | |||
| 应用手册 | Extending the Input Voltage Range of the LM5180‐Q1 PSR Flyback for VDA320(LV148) | 2020-1-30 | ||||
| 应用手册 | Using the TL431 for Undervoltage and Overvoltage Detection (Rev. A) | 2019-12-11 | ||||
| 选择指南 | 431 Device Nomenclature (Rev. B) | 2019-9-18 | ||||
| 电子书 | 电压监测仪和电压检测器:提示、技巧和基础知识 | 英语版 | 2019-8-28 | |||
| 技术文章 | Gain ultra-high power density for 100-W USB Power Delivery adapters | PDF | HTML | 2019-3-5 | |||
| 应用手册 | Designing with the ATL431LI | 2018-11-27 |
设计与开发
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ATL431EVM-001 — ATL431 可调节分流稳压器评估模块
通过使用不同的电阻值编程阴极电压,ATL431EVM-001 评估模块 (EVM) 可实现 ATL431 的功能和可调节性。您也可以使用与电源串联的各个电阻器设置阴极电流。除可用于 EVM 外,电阻器还可焊接至电路板,根据具体应用来定制电路板。使用此 EVM 可检验 ATL431 的稳定性,通过跳线可在阳极和阴极之间连接 12 个以上输出电容器。此 EVM 还与采用 SOT23-3 封装的 TL431、TL431LI、ATL431LI、LM431 和 TLVH432 器件兼容。
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| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| X2SON (DQN) | 4 | Ultra Librarian |
| SOT-23 (DBZ) | 3 | Ultra Librarian |