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HTC LM1117RS-1.2
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- HTC LM1117RS-1.2
- Type
- HTC
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 1.2V@(1A)
- Electronic Component
- HTC
- Electronic Component
- 100uV
- Electronic Component
- LM1117RS-1.2
- Electronic Component
- 1
- Package
- TO-252-2(DPAK)
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 0.466g
- Electronic Component
- 1
- Electronic Component
- BM0229979437
- Operating Temperature
- 40℃~+125℃@(Tj)
- Operating Voltage
- 12V
- Output
- Electronic Component
- Output Voltage
- 1.2V
- Output Current
- 1A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
LM1117RS-1.2 产品概述
一、概述
LM1117RS-1.2 是一款固定输出的线性低压差稳压器（LDO），输出电压为1.2V，单路输出，额定输出电流可达1A。器件集成过流保护与过热保护，适合为对噪声与纹波有较高要求的模拟/数字电路提供稳压电源。标准封装为TO-252-2(DPAK)，品牌标识为HTC，适用于表面贴装应用。
二、主要特点
- 固定输出电压：1.2V
- 输出电流：1A（最高）
- 静态电流(Iq)：约5mA
- 低压差：1.2V @ 1A
- 高频PSRR：≈75dB @ 120Hz
- 输出噪声：约100µV
- 过流保护与热关断保护
- 工作结温范围：-40°C ~ +125°C
- 封装：TO-252-2 (DPAK)
三、电气性能要点
- 输入电压建议比输出高出至少压差值：实际应用时输入电压需大于 Vout + 1.2V；若典型工况为12V 输入，器件在1A输出时工作余量充分。
- 静态电流5mA 对电池供电系统会带来持续空载消耗，应在功耗预算中考虑。
- PSRR 75dB 在低频纹波抑制方面表现优异，适合对模拟电路供电。
四、热管理与保护
线性稳压器的功耗主要由(Vin - Vout) × Iout 决定。在12V输入、1.2V输出、最大1A负载时，功耗约为10.8W，需注意良好的散热设计：采用大面积铜箔散热、通过孔过孔或外接散热片，避免因结温升高触发热关断。
五、封装与安装建议
TO-252-2 (DPAK) 适合贴片加工，底部散热基板需焊接良好铜箔。输出端稳定性依赖外部电容，建议在输入端与输出端分别并联去耦电容（典型：输入0.1µF陶瓷 + 1µF~10µF电解/固态，输出使用低ESR电容如10µF钽电容或固态电解），并靠近引脚布局以保证稳定与瞬态响应。
六、典型应用
- 工业控制与嵌入式系统的低压核心电源
- 通信设备中的模拟与数字供电
- 传感器、ADC/DAC 等对低噪声供电有要求的模块
七、设计注意事项
- 核算最大功耗并做好散热，必要时降低输出电流或采用降压预稳压器以减小热损耗。
- 输出与输入电容需满足稳定性要求，避免使用高ESR或无推荐值的电容。
- 在布局上尽量缩短输入/输出与接地回路，增大散热铜面积。
总结：LM1117RS-1.2 提供稳定、低噪声的1.2V输出，带有必要的保护功能，适合需要高纹波抑制和良好瞬态响应的应用场景。但在高Vin-低Vout且大电流场合需格外关注热管理与功耗问题。
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