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TI TLV431BIDBZR
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
20
specifications
Core information
- Product name
- TI(Texas Instruments) TLV431BIDBZR
- Type
- TI
- Unit
- Electronic Component
- Minimum package
- 3000 编带
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- TI(Texas Instruments)
- Electronic Component
- TLV431BIDBZR
- Electronic Component
- 1
- Package
- SOT-23-3
- Electronic Component
- Voltage Reference IC
- Electronic Component
- ±0.5%
- Electronic Component
- 0.034g
- Electronic Component
- 1
- Electronic Component
- BM0227583446
- Operating Temperature
- 40℃~+125℃
- Output Voltage
- 1.24V~6V
- Output Current
- 15mA
- Output Type
- Electronic Component
- Static Current(Iq)
- 80uA
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
TLV431BIDBZR 产品概述
一、主要参数
TLV431BIDBZR 是德州仪器（TI）推出的一款可调并联（基准型并联稳压器）电压基准芯片，封装为 SOT-23-3。关键参数如下：
- 输出类型：可调（并联式电压基准/可编程分流参考）
- 输出电压范围：1.24 V ～ 6.00 V
- 精度：±0.5%（初始精度）
- 静态电流（Iq）：典型 80 μA
- 最小阴极电流以保证调节：100 μA
- 最大输出（分流）电流：15 mA
- 工作温度范围：-40 ℃ ～ +125 ℃
二、产品特性简述
TLV431B 系列以低静态电流、高精度和宽温度范围为特点，适合对功耗和精度都有较高要求的系统。典型优势包括：低待机电流适合电池供电设备；高精度（±0.5%）利于对精密参考电压要求的模拟或数模混合电路；可调输出允许灵活设置多档参考电压或精密比较基准。
三、典型电路与计算公式
TLV431B 作可调基准器时，通常通过外部两个电阻构成反馈分压，设置所需输出电压。常用计算公式： VOUT = VREF × (1 + R1 / R2) + IREF × R1 其中 VREF 为内部基准（名义 1.24 V），IREF 为参考针脚偏置电流（通常很小，可在大多数设计中忽略）。在设计时应确保分流电流（流过芯片阴极的电流）在 100 μA 至 15 mA 之间，以维持稳压并满足线性与精度规范。
四、封装与热管理
SOT-23-3 小封装便于空间受限的应用，但作为并联分流器件需要关注功耗与热耗散。实际使用时需计算：功耗 P = (VIN - VOUT) × IK（其中 IK 为分流电流），并验证封装的热阻和电路板散热能力，避免过热导致漂移或失效。
五、典型应用场景
- ADC/DAC 参考电源、比较器参考
- 低功耗电子设备的参考与电压监控
- 可调稳压与精密电压基准电路
- 工业与仪表领域的精准测量前端
- 电池管理与电源轨生成（需注意分流损耗）
六、设计与选型建议
- 确保在所有工作条件下阴极电流不低于 100 μA，以保持调节；同时避免长期工作在靠近最大 15 mA 的分流电流上，以减少功耗和热应力。
- 选择反馈电阻值时兼顾功耗和抗干扰能力：过大电阻会放大 IREF 误差，过小电阻会增加分流损耗。
- 在有噪声或高精度需求时，可在 REF 引脚附近加小型旁路电容以降低噪声（参考厂商应用说明）。
- 注意热设计，SOT-23-3 的功耗限制受 PCB 铜箔面积和环境温度影响，应在原理样机中验证温升与精度稳定性。
- 若需更高工作电流或更低噪声，请参考 TI 同系列或其他封装 / 等级的器件以满足系统要求。
总结：TLV431BIDBZR 以其低静态电流、0.5% 精度和可调输出（1.24 V～6 V）在便携、工业与精密测量等多种场景中具有良好适应性，合理的电流、热与外部电阻设计可发挥其最佳性能。
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