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KEC KIA7818API-U/PF
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- KEC KIA7818API-U/PF
- Type
- KEC
- Minimum package
- 1000 盒
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 2V@(1A)
- Electronic Component
- KEC
- Electronic Component
- 125uVrms
- Electronic Component
- KIA7818API-U/PF
- Electronic Component
- 1
- Package
- TO-220F
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 2.2g
- Electronic Component
- 1
- Electronic Component
- BM0258722373
- Operating Temperature
- 40℃~+150℃
- Operating Voltage
- 40V
- Output
- Electronic Component
- Output Voltage
- 18V
- Output Current
- 1A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
KIA7818API-U/PF 产品概述
一、型号概述
KIA7818API-U/PF 是 KEC 推出的固定输出线性稳压器（LDO），输出电压为 18V，额定输出电流 1A，最大输入电压支持 40V，采用 TO-220F 塑封封装。该器件针对需要低噪声、高抑制电源的工业与消费类电路而设计，具有多重保护功能，适合作为后级稳压或对噪声敏感模拟电路的供电模块。
二、主要特性
- 输出类型：固定 18V（正极输出），单通道；
- 输出电流：最高 1A；
- 压差（Dropout）：2V @ 1A，适合中等差分电压场合；
- 电源纹波抑制比（PSRR）：68dB @ 120Hz，优异的工频纹波抑制能力；
- 输出噪声：125 μVrms，适合高精度模拟前端；
- 保护：过流保护、短路保护、过热（热关断）保护；
- 工作温度范围：-40℃ ~ +150℃；
- 封装：TO-220F，便于散热和安装。
三、电气与热性能要点
- 输入电压应高于输出电压加压差（Vin ≥ Vout + 2V），在满载 1A 时保证稳定输出；
- PSRR 68dB（120Hz）表明在电源侧有较大纹波时，输出仍能保持低干扰，适合电源后级抑制；
- 噪声 125 μVrms 适合驱动运放、AD/DA 外围电路和噪声敏感的传感器接口；
- TO-220F 有利于借助散热片或面包板散热，满载时需注意热阻与热沉设计以避免热关断。
四、保护与可靠性
内置过流与短路保护能在瞬时异常负载下限制电流，降低外部元件损伤风险；过热保护在结温过高时自动关断输出，并在冷却后自动恢复，提升系统可靠性。工作温度覆盖-40~+150℃，适应较宽的工业温度环境。
五、封装与安装建议
- TO-220F 封装便于通过螺栓固定至散热器，建议使用绝热垫与导热硅脂以改善热传导；
- 布局上输入端与输出端电容应靠近引脚放置，推荐输入端 0.1–1 μF 陶瓷并联 10–47 μF 低 ESR 电容，输出端至少 10 μF 低 ESR 电解或钽电容并联 0.1 μF 陶瓷以保证稳定性与瞬态响应；
- 走线短且粗，地线应独立回流，减少噪声耦合。
六、典型应用场景
适用于工业控制电源、模拟信号链电源、通信设备的线性后级稳压、精密测量仪器、噪声敏感的传感器供电及其他要求稳定、低噪声 18V 电源的场合。
七、设计注意事项
- 确保输入电压余量满足压差要求并考虑启动时电压跌落；
- 满载时评估结到外壳/环境的热阻，必要时选配合适散热片或强制风冷；
- 在高频或长电缆环境中，输入端增加适当滤波可进一步优化 PSRR 实效；
- 评估系统故障模式，合理配置熔断器或限流元件以配合器件保护功能。
KIA7818API-U/PF 以其高 PSRR、低噪声和完善保护特性，适合在要求稳定、干净电源的中小功率设计中作为可靠的线性稳压选择。
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