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LRC LR1117CS33X
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- LRC LR1117CS33X
- Type
- LRC
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 1.3V@(1A)
- Electronic Component
- LRC
- Electronic Component
- LR1117CS33X
- Electronic Component
- 1
- Package
- SOT-223-4
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 0.256g
- Electronic Component
- 1
- Electronic Component
- BM0228535523
- Operating Temperature
- 20℃~+125℃@(Tj)
- Operating Voltage
- 12V
- Output
- Electronic Component
- Output Voltage
- 3.3V
- Output Current
- 1A
- Output Type
- Electronic Component
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
LR1117CS33X 产品概述
一、产品简介
LR1117CS33X 是乐山无线电（LRC）推出的一款高可靠性固定输出线性稳压器（LDO），输出电压为 3.3V，最大输出电流 1A，适用于对噪声和PSRR有要求的嵌入式电源系统。器件采用 SOT-223-4 封装，体积小、成本低，常用于单电源 12V/15V 到 3.3V 的降压稳压场合。
二、主要规格
- 输出类型：固定（3.3V）
- 最大输出电流：1A
- 工作电压：典型系统电源 12V（器件可支持高达 15V 输入）
- 压差（Dropout）：1.3V @ 1A
- 静态电流（Iq）：约 2mA
- PSRR：60dB @ 120Hz
- 工作温度：-20℃ ~ +125℃（结温范围）
- 保护特性：过热保护、过流保护
- 封装：SOT-223-4
三、性能与保护特性
LR1117CS33X 提供稳健的热保护与限流功能，当输出短路或过载时，限流电路会限制电流并通过热关断保护器件。60dB（120Hz）左右的 PSRR 对工控、通讯模块及音视频前端电源噪声抑制有明显帮助。静态电流约 2mA，适合对静态功耗有一定要求但需大电流瞬态能力的应用。
四、热设计与应用注意
线性稳压器的耗散功率为 (Vin - Vout) × Iout，若系统供电 12V，输出 3.3V，满载 1A 时器件须耗散约 8.7W，这对 SOT-223-4 封装而言需要良好 PCB 散热（加大散热铜箔、使用热过孔或外加散热片）。在高 Vin 或长时间大电流工况下，建议评估结温并必要时采用降压预稳或开关前级以降低功耗。
五、典型外围与布局建议
为保证稳定性与瞬态响应，建议在输入端并联 0.1µF~1µF 陶瓷去耦电容，输出端推荐使用 10µF 低 ESR 电解或固态电容并配合陶瓷旁路（具体需参考厂方应用手册对 ESR 范围的要求）。布板时确保输入、输出电容靠近器件引脚，功率走线加宽、输出回流路径短且避免热聚集。
六、应用场景与选型建议
适合单板电源、工业控制、通信模块、嵌入式开发板和传感器节点等需要稳压 3.3V、短时或间歇性 1A 驱动能力的场景。若系统长时间满载或输入与输出压差大，建议考虑带高效率的 DC-DC 降压转换器；若对噪声和瞬态性能有更高要求，可在模拟电路或射频前端使用本器件以获得更低纹波与更高 PSRR。
总体而言，LR1117CS33X 在成本、可用性和基本保护方面表现均衡，是对体积和干净电源有要求的中低功耗到中等功耗应用的实用选择。购买与设计前，建议参考 LRC 的器件详细规格书以确认引脚定义、外部电容规范及热阻参数。
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