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TI TL431BIDBVR
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- TI(Texas Instruments) TL431BIDBVR
- Type
- TI
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- TI(Texas Instruments)
- Electronic Component
- TL431BIDBVR
- Electronic Component
- 1
- Package
- SOT-23-5
- Electronic Component
- Voltage Reference IC
- Electronic Component
- ±0.5%
- Electronic Component
- 0.03g
- Electronic Component
- 1
- Electronic Component
- BM0227583084
- Operating Temperature
- 40℃~+85℃@(Ta)
- Operating Voltage
- 2.495V~36V
- Output Voltage
- 2.495V~36V
- Output Current
- 100mA
- Output Type
- Electronic Component
- Electronic Component
- Electronic Component
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
TL431BIDBVR 产品概述
一、概述与定位
TL431BIDBVR 是德州仪器（TI）推出的一款高精度可调并联（分流）电压基准芯片，采用 SOT-23-5 小封装。其基准电压典型值为 2.495V，工作电压范围可达 2.495V 至 36V，输出（并联）电流能力为最大 100mA，精度优于 ±0.5%，工作温度范围为 -40°C 至 +85°C。器件适合在体积受限且对基准精度和稳定性有较高要求的系统中作为精密参考源或误差放大/比较元件使用。
二、主要电气参数
- 基准类型：并联（分流）电压基准（可调）
- 标称基准电压：2.495 V（典型）
- 工作/输出电压范围：2.495 V ～ 36 V
- 最大输出/分流电流：100 mA
- 最小阴极电流以保证调节：700 µA
- 精度：±0.5%（典型条件下）
- 工作温度范围：-40°C ～ +85°C
- 封装：SOT-23-5
三、功能特点与优势
- 高精度：±0.5% 的初始精度，适合需要严格参考精度的模拟电路和 ADC/DAC 参考源。
- 宽电压和电流范围：支持低至基准电压的输入，同时承受最高 36V，分流电流可达 100mA，便于直接驱动小负载或作为瞬态吸收元件。
- 小封装：SOT-23-5 适用于空间受限的便携或嵌入式应用。
- 低最低调节电流：700 µA 的最小阴极电流使其在低功耗场景下也能维持基准稳定。
四、典型应用场景
- 开关电源或线性稳压器的误差放大与参考
- 精密电压监测、参考源、基准点提供（ADC/DAC）
- 电池管理与充电控制器的参考与比较
- LED 驱动与恒流源（需要配合外部元件分担功耗）
- 仪器仪表与传感器前端的稳定基准源
五、设计与布局注意事项
- 功耗管理：在大电压差与高分流电流下，器件功耗显著，请计算 Pd = (Vin - Vref) × Ik，并确保 SOT-23-5 封装的散热能力满足要求；必要时通过串联限流电阻或外接功率晶体管分担热量。
- 稳定性：与外部反馈电阻和旁路电容配合，避免高频振荡。若出现噪声或振荡，可在参考端并联小电容（数十 pF）改善稳定性。
- 最小调节电流：确保在所有工作条件下阴极电流不低于 700 µA，以维持规定精度；若负载可能拉低电流，应增加偏置电流来源。
- 布局：将参考端与敏感模拟地短路径连接，减少噪声注入；高电流回路与基准回路分离，优化散热路径。
六、小结
TL431BIDBVR 以其高精度、可调性和宽输入电压/输出电流范围，适合作为精密并联基准和反馈元件在各类电源与测量系统中使用。合理的热设计与布局、以及确保最低调节电流，是发挥该器件稳定性能的关键。若需更高电流或更好散热，可考虑配合外部功率元件使用。
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