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LM431

正在供货

精度为 2%、1% 或 0.5% 的可调精密齐纳并联稳压器

产品详情

Rating Catalog VO (V) 2.5 Initial accuracy (max) (%) 0.5, 1, 2 Iz for regulation (min) (µA) 400 VO adj (min) (V) 2.5 VO adj (max) (V) 36 Reference voltage (V) adjustable Temp coeff (max) (ppm/°C) 97 Operating temperature range (°C) -40 to 85 Iout/Iz (max) (mA) 100
Rating Catalog VO (V) 2.5 Initial accuracy (max) (%) 0.5, 1, 2 Iz for regulation (min) (µA) 400 VO adj (min) (V) 2.5 VO adj (max) (V) 36 Reference voltage (V) adjustable Temp coeff (max) (ppm/°C) 97 Operating temperature range (°C) -40 to 85 Iout/Iz (max) (mA) 100
TO-92 (LP) 3 19.136 mm² (5.2 mm × 3.68 mm) SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm) SOT-23 (DBZ) 3 6.9204 mm² (2.92 mm × 2.37 mm)
  • Average Temperature Coefficient 50 ppm/°C
  • Temperature Compensated for Operation Over
    the Full Temperature Range
  • Programmable Output Voltage
  • Fast Turnon Response
  • Low-Output Noise
  • Low-Dynamic Output Impedance
  • Available in Space-Saving SOIC-8, SOT-23, and
    TO-92 Packages
  • Average Temperature Coefficient 50 ppm/°C
  • Temperature Compensated for Operation Over
    the Full Temperature Range
  • Programmable Output Voltage
  • Fast Turnon Response
  • Low-Output Noise
  • Low-Dynamic Output Impedance
  • Available in Space-Saving SOIC-8, SOT-23, and
    TO-92 Packages

The LM431 is a 3-terminal adjustable shunt regulator with ensured temperature stability over the entire temperature range of operation. The output voltage may be set at any level greater than 2.5 V (VREF) up to 36 V merely by selecting two external resistors that act as a voltage divided network. Due to the sharp turnon characteristics this device is an excellent replacement for many Zener diode applications.

The LM431 is available in space-saving SOIC-8, SOT-23, and TO-92 packages.

The LM431 is a 3-terminal adjustable shunt regulator with ensured temperature stability over the entire temperature range of operation. The output voltage may be set at any level greater than 2.5 V (VREF) up to 36 V merely by selecting two external resistors that act as a voltage divided network. Due to the sharp turnon characteristics this device is an excellent replacement for many Zener diode applications.

The LM431 is available in space-saving SOIC-8, SOT-23, and TO-92 packages.

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设计与开发

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评估板

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。

用户指南: PDF
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仿真模型

LM431 Unencrypted PSpice Transient Model Package (Rev. A)

SNVMAB5A.ZIP (49 KB) - PSpice 模型
支持的产品和硬件
计算工具

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。

支持的产品和硬件

许多 TI 参考设计都包括 LM431

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
TO-92 (LP) 3 Ultra Librarian
SOIC (D) 8 Ultra Librarian
SOT-23 (DBZ) 3 Ultra Librarian

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