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ROHM QDZT18R5.6
Configuration
1 options
Configuration
24+
Available for RFQ
Technical data
Product details
20
specifications
Core information
- Product name
- ROHM QDZT18R5.6
- Type
- ROHM
- Unit
- Electronic Component
- Minimum package
- 18000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- ROHM
- Electronic Component
- QDZT18R5.6
- Electronic Component
- 1
- Package
- SOD-882
- Electronic Component
- Zener Diode
- Electronic Component
- 0.006g
- Electronic Component
- 1
- Electronic Component
- BM0228214814
- Diode
- 1
- Current(Ir)
- [email protected]
- Power Dissipation(Pd)
- 200mW
- Electronic Component
- 5.1V~6.1V
- Electronic Component
- Electronic Component
- Electronic Component
- 18000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
QDZT18R5.6 产品概述
一、产品简介
QDZT18R5.6 是 ROHM（罗姆）出品的小功率稳压齐纳二极管，标称稳压值 5.6V，封装为 SOD-882。该器件定位为低功耗、小体积的稳压与过压保护元件，适用于便携设备、传感器前端及信号线钳位场合。其低漏电特性和适中的功耗能力使得在高阻抗电路和精密基准电路中具有良好适用性。
二、主要电气参数
- 稳压值（范围）：5.1V ~ 6.1V（标称 5.6V）
- 反向漏电流 Ir：500 nA @ 2.5 V（低漏电，利于高阻抗电路）
- 最大耗散功率 Pd：200 mW
由此可计算的最大稳流电 Iz(max) ≈ Pd / Vz ≈ 200 mW / 5.6 V ≈ 35.7 mA（理论值，实际使用需考虑热阻和环境温度）。
三、热与功率注意事项
QDZT18R5.6 的功耗等级为 200 mW，属于小功率器件。实际应用中建议按安全裕量选定工作电流：
- 短时峰值可接近 Iz(max) ~35 mA，但不建议长期工作于该值；
- 建议连续稳压电流控制在 30%60% 的 Iz(max) 范围内（例如 ≤ 1020 mA）以降低结温并延长寿命；
- PCB 铜箔面积、环境温度和散热路径对允许稳流有显著影响，必要时增加散热铜箔或改用更高功耗封装。
四、典型应用场景
- 基础基准电压源（与限流电阻配合构成简单并联稳压）
- 电源轨过压保护与浪涌吸收
- 模拟输入（ADC）过压钳位、参考电压保护
- 小信号电路偏置与温度补偿（5.6V 型通常具有较小的温度系数，便于降低温漂）
五、封装与可靠性
SOD-882 为超小型表贴封装，适合高密度布板与移动终端。使用时注意：
- 遵循 ROHM 推荐的回流焊曲线，避免超温超时导致封装或焊点损伤；
- 小封装散热能力有限，焊盘设计和底层铜量直接影响功耗承受能力；
- 存储与焊接前注意防潮等级与检视器件外观。
六、选型与使用建议
- 若需要更低温漂或更高功耗能力，可考虑不同稳压电压点或更高 Pd 的齐纳型号；
- 在高阻抗或低电流参考应用中，500 nA 的低漏电是优势，但同时要注意测试和电路输入偏置电流对精度的影响；
- 设计并联稳压器时，计算限流电阻需考虑最大输入电压、目标稳流与允许功耗，并预留安全裕量。
总结：QDZT18R5.6 以其 5.6V 的稳压特性、低漏电和小封装优势，适合对空间和功耗敏感的稳压与保护场合。正确的热设计与合理的工作电流选择是保证器件稳定可靠工作的关键。
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