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HGSEMI LM1117T-3.3 LM1117T
Configuration
1 options
Configuration
Option 71404
Availability on request
Technical data
Product details
19
specifications
Core information
- Product name
- HGSEMI LM1117T-3.3
- Type
- HGSEMI
- Minimum package
- 1000 管
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 1.25V@(1A)
- Electronic Component
- HGSEMI
- Electronic Component
- 0.003%Vout
- Electronic Component
- LM1117T-3.3
- Electronic Component
- 1
- Package
- TO-220-3L
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 2.719g
- Electronic Component
- 1
- Electronic Component
- BM0226047405
- Operating Temperature
- 40℃~+125℃@(Tj)
- Operating Voltage
- 15V
- Output
- Electronic Component
- Output Voltage
- 3.3V
- Output Current
- 1A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
LM1117T-3.3（HGSEMI 华冠）产品概述
一、产品简介
LM1117T-3.3 是一款单路固定输出的低压差线性稳压器（LDO），由 HGSEMI（华冠）生产，封装为 TO-220-3L。该器件输出为正极 3.3V，最大输出电流可达 1A，适用于对低噪声、电源稳定性有较高要求的嵌入式与工业应用。
二、主要特性
- 输出电压：3.3V（固定）
- 输出电流：最大 1A
- 压差（Dropout）：1.25V @ 1A
- 工作电压（输入允许）：最高 15V
- 静态电流（Iq）：10mA（典型）
- 电源纹波抑制比（PSRR）：75dB @ 120Hz
- 输出噪声：0.003% Vout（约 99µV RMS 量级）
- 保护机制：过流保护（OCP）、过热保护（thermal shutdown）
- 工作结温：-40℃ ~ +125℃ (Tj)
- 封装：TO-220-3L（散热良好，便于加装散热片）
三、性能说明与设计注意
- 稳定性与电容：为保证稳定与良好瞬态响应，建议在输入端和输出端分别并联 10µF（或等效低 ESR）电容，输出端电容应靠近引脚布置。
- 散热与功耗：在 Vin = 15V、Iout = 1A 条件下，器件耗散约 (15 − 3.3)×1A ≈ 11.7W，须采用合适散热片或良好 PCB 散热设计以避免热关断或过热损伤。
- 引脚与接线：TO-220-3L 常见的引脚排列为（从左到右）ADJ/GND（固定版为 GND）、OUT、IN，金属背板通常与 IN 相连，具体以产品数据手册为准。
- 可靠保护：内部过流与过热保护在短路或过载时能提供自恢复保护，但长期工作在极限条件下会降低可靠性，建议电路中增加外部限流或熔断措施。
四、典型应用场景
- 嵌入式系统与单板电脑的 3.3V 电源供给
- 工业控制器、传感器供电模块
- 通信设备、外围接口电源
- 需要高 PSRR、低噪声的模拟前端与 ADC 供电
五、总结
LM1117T-3.3（HGSEMI）以其高 PSRR、低噪声与内置保护特性，适合为要求稳定 3.3V 电源的小型至中等功率系统提供可靠供电。设计时应重视输出电容的选择和完善的散热处理，确保在高 Vin 与大电流条件下稳定、安全运行。若需进一步的电气特性曲线、热阻参数或典型应用电路图，请参照官方数据手册。
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