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TECH PUBLIC AMS1117-5.0S AMS1117
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- TECH PUBLIC AMS1117-5.0S
- Type
- TECH PUBLIC
- Minimum package
- 1000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 1.2V@(1A)
- Electronic Component
- TECH PUBLIC
- Electronic Component
- 0.003%Vout
- Electronic Component
- AMS1117-5.0S
- Electronic Component
- 1
- Package
- SOT-89
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 0.145g
- Electronic Component
- 1
- Electronic Component
- BM0231019663
- Operating Temperature
- 40℃~+125℃@(Tj)
- Operating Voltage
- 12V
- Output
- Electronic Component
- Output Voltage
- 5V
- Output Current
- 1A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
AMS1117-5.0S 产品概述
一、产品简介
AMS1117-5.0S（品牌：TECH PUBLIC / 台舟电子）是一款固定输出的线性低压差稳压器（LDO），输出电压为5.0V，最大输出电流1A，采用小型SOT-89封装。器件集成过流保护和热关断功能，适用于对噪声和纹波抑制有一定要求的嵌入式电源前端和低功率电器设备。
二、主要电气参数
- 输出类型：固定（5.0V）
- 工作电压（典型输入）：12V（器件可在较宽输入范围使用，详见数据手册）
- 输出电流：1A（最大）
- 压差（Dropout）：1.2V @ 1A（意味着在满载时输入电压最低需约6.2V）
- 静态电流 Iq：5mA（静态功耗需计入电源预算）
- 电源纹波抑制比 PSRR：75dB @ 120Hz（对工频纹波有良好抑制）
- 噪声：0.003% × Vout ≈ 150µV（5V 输出时的典型相对噪声）
- 输出极性：正极；单通道输出
三、保护与可靠性
器件内置过流保护（OCP）和热关断（Thermal Shutdown），在短路或过载条件下能限制输出电流并在过热时关闭输出以防损坏。额定结温范围为 -40℃ ~ +125℃（Tj），适应工业级工作环境，但长期高温会缩短使用寿命，应做好热设计。
四、热设计与功耗提示
线性稳压器的功耗等于(Vin − Vout) × Iout。若输入为12V、输出5V、负载1A，则耗散功率约为7W，这对SOT-89封装来说热量极大，难以靠裸封装散热。使用时应：
- 尽量减小 Vin−Vout，或
- 降低负载电流，或
- 采用散热铜箔、散热片或换用功率更强的封装/开关稳压器。
五、封装与布局建议
SOT-89小型封装适合空间受限的板级设计。为保证稳压器稳定与低噪声输出，建议在输入和输出端靠近器件放置适量去耦电容（建议输出端采用低ESR电容，典型建议为 10µF 级别），并保证良好接地回流路径及足够的铜面积用于散热。
六、典型应用场景
- 单片机供电、传感器模组、显示驱动的本地5V电源
- 工业控制终端的低噪声电源
- 教育/原型开发板（注意热管理）
七、选型与注意事项
在选用 AMS1117-5.0S 时，应重点评估输入电压与负载电流带来的功耗与散热能力；若系统需在12V输入下长期1A输出，建议改用开关型降压器或采用大功率封装以保证可靠性。同时，遵守数据手册关于输出电容 ESR 范围和布局的建议，以确保稳定工作。
八、总结
AMS1117-5.0S（TECH PUBLIC / 台舟电子，SOT-89）是一款性能稳定、噪声低、PSRR 优秀的固定5V LDO，适合中低功率、对纹波和噪声有要求的应用场景。但因线性功耗特性，对高压差大电流工况需慎重考虑热管理或替代方案。
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