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LOWPOWER LP3980-18B5F
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- LOWPOWER LP3980-18B5F
- Type
- LOWPOWER
- Minimum package
- 3000 个
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 360mV@(300mA)
- Electronic Component
- LOWPOWER
- Electronic Component
- 100uVrms
- Electronic Component
- LP3980-18B5F
- Electronic Component
- 1
- Package
- SOT-23-5
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 0.052g
- Electronic Component
- 1
- Features
- Output
- Electronic Component
- BM0229474298
- Operating Temperature
- 40℃~+85℃@(Ta)
- Operating Voltage
- 5.5V
- Output
- Electronic Component
- Output Voltage
- 1.8V
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
LP3980-18B5F 产品概述
一、产品简介
LP3980-18B5F 是一款面向低功耗与便携应用的固定输出线性稳压器（LDO），输入电压最高可达 5.5V，固定输出电压为 1.8V，单通道输出，正极输出。器件封装为 SOT-23-5，适合空间受限的手持设备与消费类电子产品。该器件专注于低静态电流与高电源纹波抑制性能，在对噪声和电源稳定性有要求的系统中表现优异。
二、主要电气性能亮点
- 输入电压范围（上限）：5.5V（典型用于 5V 或更低电源系统）
- 输出电压：固定 1.8V
- 最大输出电流：300mA（推荐在额定条件下使用）
- 压差（Dropout）：360mV @ 300mA（低压差，利于低压差供电设计）
- 静态电流（Iq）：≈20µA（非常低的静态功耗，适合电池供电）
- 电源纹波抑制比（PSRR）：76dB @ 1kHz（对模拟、射频前端噪声抑制良好）
- 输出噪声：约 100µVrms（适合对噪声敏感的模拟与传感电路）
- 保护功能：带使能（EN）、过流保护（OCP）、过热保护（OTP）
- 工作温度范围：-40℃ ~ +85℃（Ta）
三、功能与应用场景
- 使能（EN）引脚方便系统级电源控制与功耗管理，可实现片上断电或唤醒功能。
- 过流与过热保护提高系统可靠性，适合便携式、工业与消费电子产品。
- 典型应用包括低功耗 MCU 电源、传感器供电、无线与通信模块的模拟电源、便携式测量设备等。高 PSRR 特性使其特别适合对电源噪声敏感的射频/模拟前端电路。
四、布局与使用建议
- 输出去耦：建议在 VOUT 近端放置低 ESR 陶瓷电容（常用 1µF～10µF），以保证系统稳定性并降低输出纹波与瞬态响应。
- 输入去耦：VIN 端亦建议并联陶瓷电容以抑制输入干扰和提高瞬态能力。
- 热设计：尽管封装小巧，但在大电流输出或高压差时需注意芯片功耗与热阻，必要时在 PCB 上扩大 GND/散热铜箔面积以利散热。
- 使能控制：使能引脚未使用时应按规格手册连接到合适电平，避免浮空导致不确定工作态。
五、封装与选型提示
- 封装：SOT-23-5，适合 SMT 小型化布局。
- 选型注意：确认系统最大负载电流与压差条件下的功耗与热裕量；若系统需要更高电流，可考虑同系列或替代型号；在关键应用中建议参考厂商完整数据手册以获取详细电气表、典型应用电路及 PCB 布局示意。
LP3980-18B5F 以其低静态电流、高 PSRR 与完整保护功能，适用于对电源噪声和功耗敏感的便携与嵌入式系统，是构建稳健 1.8V 供电解决方案的良好选择。若需进一步的引脚配置、电气特性曲线或典型应用原理图，可提供更详细的产品手册进行核对。
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