LMV431A
- Low-Voltage Operation/Wide Adjust Range
(1.24 V/30 V) - 0.5% Initial Tolerance (LMV431B)
- Temperature Compensated for Industrial
Temperature Range (39 PPM/°C for
the LMV431AI) - Low Operation Current (55 µA)
- Low Output Impedance (0.25 Ω)
- Fast Turn-On Response
- Low Cost
The LMV431, LMV431A and LMV431B are precision 1.24 V shunt regulators capable of adjustment to 30 V. Negative feedback from the cathode to the adjust pin controls the cathode voltage, much like a non-inverting op amp configuration (Refer to Symbol and Functional Diagrams). A two-resistor voltage divider terminated at the adjust pin controls the gain of a 1.24 V band-gap reference. Shorting the cathode to the adjust pin (voltage follower) provides a cathode voltage of a 1.24 V.
The LMV431, LMV431A and LMV431B have respective initial tolerances of 1.5%, 1%, and 0.5%, and functionally lend themselves to several applications that require zener diode type performance at low voltages. Applications include a 3 V to 2.7 V low drop-out regulator, an error amplifier in a 3 V off-line switching regulator and even as a voltage detector. These parts are typically stable with capacitive loads greater than 10 nF and less than 50 pF.
The LMV431, LMV431A and LMV431B provide performance at a competitive price.
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 | LMV431l;LMV431Al;LMV431B Low-Voltage (1.24V) Adj Precision Shunt Regs 数据表 (Rev. G) | 2014-9-22 | |||
| 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 | |||
| 应用手册 | TO-92 Packing Options / Ordering Instructions (Rev. A) | 2010-6-23 |
设计与开发
如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。
SHUNT-REFERENCE-CALC — Shunt Reference Selector and Design Calculator
SHUNT_VOLTAGE_REFERENCE_RESISTOR_CALCULATOR — Shunt Voltage Reference External Resistor Quick Start Calculator
该外部电阻器快速入门计算器工具支持您根据电压基准、电源和负载电流限值轻松计算有效的外部电阻值。根据这些输入，您可以马上查看计算结果并通过以颜色标记的指示了解计算出的输出是否有效。
许多 TI 参考设计都包括 LMV431A
通过我们的参考设计选择工具来审查并确定最适用于您应用和参数的设计。
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| SOT-23 (DBV) | 5 | Ultra Librarian |
| TO-92 (LP) | 3 | Ultra Librarian |
| SOT-23 (DBZ) | 3 | Ultra Librarian |