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YONGYUTAI LM7805
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- YONGYUTAI LM7805
- Type
- YONGYUTAI
- Minimum package
- 1000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 2V
- Electronic Component
- YONGYUTAI
- Electronic Component
- 42uV
- Electronic Component
- LM7805
- Electronic Component
- 1
- Package
- TO-263
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 1.791g
- Electronic Component
- 1
- Electronic Component
- BM0225825459
- Operating Temperature
- 0℃~+125℃
- Operating Voltage
- 20V
- 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.
LM7805 线性稳压器（TO-263）— 产品概述
一、产品简介
YONGYUTAI（永裕泰）LM7805 是一款固定输出的线性稳压器，输出电压为5V，单通道设计，采用 TO-263（D2PAK）封装，适用于对噪声与纹波有较高要求的中低功率电源应用。器件集成了短路保护与过热保护，提升系统可靠性，适合工业与消费类电路的稳压需求。
二、主要性能特点
- 固定输出：5.0V 正输出，单路输出。
- 最大输出电流：1A（请在散热条件允许下使用）。
- 压差（Dropout）：2V，负载工作时输入电压至少需高出输出约2V。
- 静态电流（Iq）：8mA，空载时静态消耗小。
- PSRR：62dB @ 120Hz，具备良好的电源纹波抑制能力。
- 噪声：42µV（典型），适用于对输出噪声敏感的模拟与数模混合电路。
- 保护功能：短路保护与热关断保护，提高使用安全与抗故障能力。
- 工作温度范围：0℃～+125℃。
三、电气参数与工作条件
- 典型工作输入电压上限信息标注为 20V（请参照器件具体数据表确认最大允许输入电压与瞬态容限）。
- 由于压差为2V，最低输入电压要求约为 5V + 2V = 7V，低压差工况请注意选择或采用低压差 LDO。
- 在满载1A且输入为20V时，功耗 P = (Vin − Vout) × Iout = (20 − 5) × 1A = 15W，需重点考虑散热与封装功耗能力。
四、热设计与功耗计算
线性稳压器的功耗全部以热量释放在封装上。举例：若输入20V、输出5V、负载1A，器件需消耗约15W的功率，单靠 PCB 铜箔难以散热，需采用大面积散热铜箔、散热垫片或外接散热片。务必计算结温 Tc／Tj，保证在最大环境温度下结温不超限。
五、典型应用场景
- 工业控制电源、单板电源轨（需注意热管理）
- 模拟与数模混合电路的5V参考电源（受噪声与PSRR优势益处）
- 通用嵌入式设备电源（当输入电压高且有足够散热时）
六、PCB布局与外围电路建议
- 输入侧与输出侧应靠近器件放置去耦电容，建议输入使用电解／铝电容，输出使用低 ESR 电容以保证稳压器稳定性（按厂商数据表选择电容类型与容量）。
- TO-263 为表面贴装大功率封装，底面大面积铜箔和过孔有助于散热。
- 若长期大电流工作，建议在器件背面焊接散热片或使用专用散热母板。
七、封装与机械注意事项
TO-263（D2PAK）适合自动贴装与回流焊接，便于量产。注意焊盘设计与热铜面积匹配，以提高散热效率并保证机械强度。
八、选型提示与注意事项
- 若电路输入电压接近或低于7V，应选用低压差（LDO）型号；若系统要求长时间大电流输出且输入电压较高，优先考虑开关型稳压或额外散热设计。
- 使用前请参考 YONGYUTAI 的完整数据手册，确认最大输入电压、功率限制、建议外围电容与热阻参数，以确保长期可靠运行。
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