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LOWPOWER LP3993-50B3F
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- LOWPOWER LP3993-50B3F
- Type
- LOWPOWER
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- LOWPOWER
- Electronic Component
- LP3993-50B3F
- Electronic Component
- 1
- Package
- SOT-23
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 0.047g
- Electronic Component
- 1
- Electronic Component
- BM0230633634
- Operating Temperature
- 40℃~+85℃@(Tj)
- Operating Voltage
- 24V
- Output
- Electronic Component
- Output Current
- 200mA
- Output Type
- Electronic Component
- Output Channel Count
- 1
- Static Current(Iq)
- 5uA
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
LP3993-50B3F 产品概述
一、概述
LP3993-50B3F 是微源半导体（LOWPOWER）面向低功耗便携和工业应用的一款固定输出线性稳压器，封装为常见的 SOT-23。器件提供固定正极输出，输出电压为 24V（固定型），最大持续输出电流 200mA，静态工作电流（Iq）极低，典型值仅 5µA，适合需要长期待机与节能的系统设计。
二、主要特性
- 固定输出：24V，正极输出
- 输出电流：最高 200mA（持续）
- 超低静态电流：Iq ≈ 5µA（典型），有利于电池系统待机寿命
- 保护功能：内置过流保护 (OCP) 与过热保护 (OTP)，提高系统可靠性
- 工作温度：-40℃ 至 +85℃（以结温 Tj 标注）
- 通道数：单通道，封装 SOT-23，适合空间受限的 PCB 布局
三、典型应用场景
- 电池供电设备（便携式仪表、传感器节点）
- 工业控制与测量模块（需要稳压与保护的外围电源）
- 通信终端的模拟/数字前端电源
- 低功耗采集与唤醒电路
四、封装与引脚提示
LP3993-50B3F 采用 SOT-23 小型封装，适合表面贴装工艺。典型 SOT-23 引脚功能包含 IN、GND、OUT（具体引脚排列请以正式数据手册为准）。由于封装热阻较大，实际应用中需重视 PCB 散热，适量的铜箔与散热过孔可以显著提升连续 200mA 工作时的热性能。
五、设计与使用建议
- 电源输入：保证 VIN >= VOUT + 最低压差（请参考厂方数据手册中的压差参数），并使用合适的输入去耦电容以抑制瞬态噪声。
- 输出电容：为确保稳压器稳定性与瞬态响应，应使用厂方推荐的输出电容类型与等效串联电阻（ESR），常见为 1µF~10µF 的低 ESR 电容。
- 热管理：在高 Vin–Vout 电压差或高输出电流下，器件功耗 Pd = (Vin - Vout) × Iout，注意计算并验证结温限值，必要时在 PCB 上增加散热面积或改用更大封装。
- 保护与上电顺序：虽然器件内置 OCP/OTP，但在系统级设计中仍建议考虑软启动、限流电路或适当的输入保护以应对短路或热关断后的重复循环。
六、可靠性与选型注意
- 在高温或连续满载场景下，关注结温与热关断触发阈值，避免长时间在热关断附近工作。
- 检查与系统兼容的输入电压范围、压差 (dropout) 与输出纹波要求；若对效率和压差有更高要求，可考虑开关型稳压器替代。
- 由于封装为 SOT-23，焊接工艺需控制回流曲线，避免因过热影响器件可靠性。
七、总结
LP3993-50B3F 以其固定 24V 输出、200mA 的驱动能力与超低 5µA 静态电流，适合对待机功耗敏感且需稳压保护的应用。内置过流与过热保护提高了系统的抗故障能力，SOT-23 封装便于小型化布局。最终选型请参考官方数据手册，核对压差、输出电容要求与热特性，以确保在目标应用下的稳定与可靠。
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