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UMW LD1117-2.5 LD1117
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- UMW LD1117-2.5
- Type
- UMW
- Minimum package
- 2500 编带
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 1.3V@(1A)
- Electronic Component
- UMW
- Electronic Component
- 0.003%Vout
- Electronic Component
- LD1117-2.5
- Electronic Component
- 1
- Package
- SOT-223
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 0.25g
- Electronic Component
- 1
- Features
- Electronic Component
- Electronic Component
- BM0228273243
- Operating Temperature
- 40℃~+125℃
- Operating Voltage
- 18V
- Output
- Electronic Component
- Output Voltage
- 2.5V
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
LD1117-2.5 产品概述
一、产品简介
UMW（友台半导体）出品的 LD1117-2.5 是一款固定输出 2.5V 的线性稳压器（LDO），采用 SOT-223 封装，面向需稳定低噪声电源的嵌入式和消费类电子应用。器件集成过流保护功能，工作温度范围宽（-40℃ 至 +125℃），适用于工业级与商用场景。
二、主要参数与特性
- 输出电压：固定 2.5V
- 最大输出电流：1A
- 最大输入电压：18V（典型工作电压参考）
- 压降（Dropout）：1.3V @ 1A
- 静态电流（Iq）：5mA
- 输出极性：正极、单通道
- 过流保护：内置限流（实现短路及过载保护）
- 工作温度：-40℃ ~ +125℃
- PSRR：60dB @ 120Hz（优良的电源纹波抑制）
- 输出噪声：约 0.003% · Vout（约 75µV [email protected]）
- 封装：SOT-223
三、典型应用
适用于对噪声、纹波要求较高的模拟电路和数字系统电源，如：低频精密放大器供电、ADC/DAC 参考电源、MCU 外设电源、通信设备局部稳压、工业控制模块等。
四、设计与使用注意事项
- 功耗与散热：线性稳压器的功耗 Pd = (Vin − Vout) × Iout。若 Vin = 18V、Vout = 2.5V、Iout = 1A，则 Pd ≈ 15.5W，SOT-223 无法在无额外散热条件下安全耗散此热量。建议尽量降低输入电压或在大电流/大压差场合采用开关降压前级以减小热损耗，并通过 PCB 大面积铜箔散热或外接散热片。
- 输出电容与稳定性：为保证环路稳定性和瞬态响应，建议在输出端使用低 ESR 的电解/钽电容或固态电容（典型值 10µF ~ 22µF），并在输入端放置 1µF~10µF 的去耦电容以抑制输入纹波与瞬态。具体电容类型应按应用在板上验证。
- 启动与过载行为：硬件上应考虑上电顺序和短路情况的保护设计，利用串联熔断器或限流电阻作为二次保护。器件内部限流保护可在短路时限制电流，但长时间高功耗仍需注意热失效。
五、封装与焊接建议
SOT-223 提供较好的成本与散热平衡，焊接时建议在 PCB 布局上为引脚对应铜箔设计散热通道并增加焊盘面积，尤其是连接地与芯片底部散热路径处；推荐在布局中预留热 vias 以增强散热至内层或底层铜箔。
六、选型与采购建议
在选型时如期望在高 Vin 与高 Iout 条件下长时间工作，优先评估散热方案或选用更适合的大功率封装/开关预稳压方案。UMW LD1117-2.5 适合中低压差、小至中等电流且对噪声与 PSRR 有要求的应用。订购时请注明封装 SOT-223 及必要的温度等级，以确保满足系统可靠性需求。
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