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Hottech 78L05
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Hottech 78L05
- Type
- SOT-89-3
- Minimum package
- 1000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 1.7V
- Electronic Component
- HOTTECH
- Electronic Component
- 42uVrms
- Electronic Component
- 78L05
- Electronic Component
- 1
- Package
- SOT-89-3
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 0.033g
- Electronic Component
- 1
- Electronic Component
- BM0227281629
- Operating Temperature
- 40℃~+125℃
- Operating Voltage
- 20V
- Output
- Electronic Component
- Output Voltage
- 5V
- Output Current
- 100mA
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
78L05 产品概述
一、产品简介
78L05 是合科泰（Hottech）推出的一款固定输出线性稳压器（LDO），输出电压为 +5V，输出电流最高可达 100mA，适用于对噪声与纹波抑制有一定要求的小功率电源模块。本器件采用 SOT-89-3 封装，体积小、引脚简单，便于在空间受限的应用中替代传统三端稳压器。
二、主要规格与性能
- 输出类型：固定（5V）
- 最大输入电压：30V（器件额定值）
- 最大输出电流：100mA
- 压差（Dropout）：1.7V（在额定负载下）→ 最小输入电压约为 5V + 1.7V = 6.7V
- 静态电流（Iq）：3.8mA
- 电源纹波抑制比（PSRR）：49dB @ 120Hz
- 输出噪声：42μVrms
- 工作温度范围：-40℃ ~ +125℃
- 输出极性：正极，单通道
这些参数表明该器件在中等负载下具有较好的纹波抑制和低噪声性能，适合用于对电源质量有一定要求的模拟/数字混合电路。
三、典型应用场景
- 工业控制小型模块及传感器电源
- 模拟前端、运放供电以降低噪声影响
- 单片机、逻辑电路的 5V 供电（注意静态电流对电池寿命影响）
- 通信模块或显示驱动的局部稳压电源
四、热管理与功耗计算
线性稳压器的功耗由 Vin-Vout 与输出电流决定：Pd = (Vin - Vout) × Iout。举例：
- 当 Vin = 12V、Iout = 100mA，Pd = (12-5)×0.1 = 0.7W。
在 SOT-89-3 小封装中，长时间工作在高压差和满载情况下会产生较高结温，需通过增加 PCB 散热铜箔、留足热面或降低输入电压来控制结温，确保在额定环境温度内稳定工作。
五、PCB 布局与滤波建议
- 输入端与输出端各并联旁路电容，建议输入侧 1µF~10µF（陶瓷/钽），输出侧使用低 ESR 电容（例如 4.7µF 陶瓷）；具体值以器件稳定性要求为准。
- 电容尽量靠近引脚布置，走线最短并加宽。
- 在散热设计上，SOT-89 背部及地面应做足够铜面积以利散热。
- 对于对纹波敏感的负载，可在输出端增加 RC 或 LC 滤波器进一步抑制高频噪声。
六、选型与使用注意事项
- 如需更低静态电流或更高输出电流，应考虑其他型号或开关电源方案；若输入电压较高、长期满载工作，需重视热耗散。
- 本概述为常见重要参数汇总，具体保护特性（如过流、热关断）和稳定性要求请以合科泰正式数据手册为准，并在设计前阅读并验证典型应用与限制条件。
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