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LMV431A

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1%、低电压 (1.24V) 可调节精密并联稳压器

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数据表

LMV431A

正在供货
数据表 立即订购

产品详情

VO (V) 1.24 Initial accuracy (max) (%) 1 VO adj (min) (V) 1.24 VO adj (max) (V) 30 Iz for regulation (min) (µA) 80 Rating Catalog Temp coeff (max) (ppm/°C) 129, 138 Operating temperature range (°C) -40 to 85, 0 to 70 Iout/Iz (max) (mA) 15
VO (V) 1.24 Initial accuracy (max) (%) 1 VO adj (min) (V) 1.24 VO adj (max) (V) 30 Iz for regulation (min) (µA) 80 Rating Catalog Temp coeff (max) (ppm/°C) 129, 138 Operating temperature range (°C) -40 to 85, 0 to 70 Iout/Iz (max) (mA) 15
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8 SOT-23 (DBZ) 3 6.9204 mm² 2.92 x 2.37 TO-92 (LP) 3 19.136 mm² 5.2 x 3.68
  • 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
  • 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.

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.
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技术文档

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类型 项目标题 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年 9月 22日
更多文献资料 TO-92 Packing Options / Ordering Instructions (Rev. A) 2010年 6月 23日

设计和开发

如需其他信息或资源，请查看下方列表，点击标题即可进入详情页面。

仿真模型

LMV431A PSpice Transient Model

SNVMA25.ZIP (57 KB) - PSpice Model
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仿真模型

LMV431A Unencrypted PSpice Transient Model

SNVMA26.ZIP (1 KB) - PSpice Model
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计算工具

SHUNT_VOLTAGE_REFERENCE_RESISTOR_CALCULATOR — 分流参考电压外部电阻快速入门计算器

这一外部电阻快速入门计算器工具让用户可以根据电压基准、电源和负载电流限值轻松计算有效的外部电阻值。使用这些输入，用户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。
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模拟工具

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PSpice® for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence® 的模拟分析引擎。PSpice for TI 可免费使用，包括业内超大的模型库之一，涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

借助 PSpice for TI 的设计和仿真环境及其内置的模型库，您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案，然后再进行布局和制造，可缩短产品上市时间并降低开发成本。

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封装 引脚数 下载
SOT-23 (DBV) 5 了解详情
SOT-23 (DBZ) 3 了解详情
TO-92 (LP) 3 了解详情

订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 认证摘要
  • 持续可靠性监测

支持与培训

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