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LMV431B

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0.5%、低电压 (1.24V) 可调节精密并联稳压器

产品详情

Rating Catalog VO (V) 1.24 Initial accuracy (max) (%) 0.5 Iz for regulation (min) (µA) 80 VO adj (min) (V) 1.24 VO adj (max) (V) 30 Reference voltage (V) adjustable Temp coeff (max) (ppm/°C) 129, 138 Operating temperature range (°C) -40 to 85 Iout/Iz (max) (mA) 15
Rating Catalog VO (V) 1.24 Initial accuracy (max) (%) 0.5 Iz for regulation (min) (µA) 80 VO adj (min) (V) 1.24 VO adj (max) (V) 30 Reference voltage (V) adjustable Temp coeff (max) (ppm/°C) 129, 138 Operating temperature range (°C) -40 to 85 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
  • 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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* 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

设计与开发

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计算工具

SHUNT-REFERENCE-CALC Shunt Reference Selector and Design Calculator

This tool guides the user through the design process for the TLx431 and LM40x0 family of shunt voltage references. This calculator will recommend resistance and capacitance values to optimally meet the user's desired specifications.
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计算工具

SHUNT_VOLTAGE_REFERENCE_RESISTOR_CALCULATOR Shunt Voltage Reference External Resistor Quick Start Calculator

This external resistor quick-start calculator tool lets you easily calculate valid external resistor values relative to voltage reference, supply and load-current bounds. With these inputs, you can instantly view the resulting calculations and use the color-coded indications to understand (...)

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参考设计

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PMP20497 是一款利用 LM5022 的隔离反激式转换器,适用于工业应用。该设计接受 12V 输入电压。此处的测试报告为 12Vin/~54V out @ 2A 负载电流。  开关频率设为 100kHz。该测试报告中针对所有范围采集使用了定制脉冲变压器。
测试报告: PDF
原理图: PDF
参考设计

PMP20551 — 12V 至 60V 输入 36W 工业级 PoE 隔离反激式参考设计

PMP20551 是一款利用 LM5022 的隔离反激式转换器,适用于工业应用。该设计支持 12V 至 60V 的 PoE 输入电压,测试报告基于 12V 输出、3A 负载电流条件。  开关频率设为 100kHz。该测试报告中对所有范围的采集均使用了定制变压器。
测试报告: PDF
原理图: PDF
参考设计

TIDA-01292 — 适用于低频离线 UPS 和逆变器的 650W 无散热器功率级参考设计

此参考设计是一款专为低频(基于变压器)单相 UPS (由 12V 电池供电) 设计的 650W 逆变器功率级。此设计采用 SON5x6 封装且具有极低 RDS(on) 和低栅极电荷 (Qg) 的 TI SMD MOSFET,可实现小外形尺寸和高效率的解决方案。通过在全桥功率级的每个桥臂上并联使用两个器件,该功率级消除了散热器需求,从而降低了总体系统成本。
设计指南: PDF
原理图: PDF
参考设计

PMP15035 — 1000W 双向12V 至12V 转换器参考设计

此参考设计是一款适用于 12V 至 12V 双电池系统汽车应用的双通道双向转换器。此参考设计具有宽输入范围(3V 至 40V),可以使用两个 LM5170-Q1 控制器在 9V 至 18V 的输入电压下提供满载 (1kW)。Vin = 18V、Vout = 12V、Iout = 40A 时,效率高达 98%。
测试报告: PDF
原理图: PDF
封装 引脚 CAD 符号、封装和 3D 模型
SOT-23 (DBV) 5 Ultra Librarian
SOT-23 (DBZ) 3 Ultra Librarian

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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
  • 鉴定摘要
  • 持续可靠性监测
包含信息:
  • 制造厂地点
  • 封装厂地点

支持和培训

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