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CJ CJ7805 3% CJ7805
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- CJ CJ7805 3%
- Type
- CJ
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 2V@(1A)
- Electronic Component
- CJ
- Electronic Component
- CJ7805 3%
- Electronic Component
- 1
- Package
- TO-252-2(DPAK)
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 0.516g
- Electronic Component
- 1
- Features
- Electronic Component
- Electronic Component
- BM0257559908
- Operating Temperature
- 25℃~+125℃@(Tj)
- Operating Voltage
- 35V
- Output
- Electronic Component
- Output Voltage
- 5V
- Output Current
- 1.5A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
CJ7805 3% 产品概述
一、产品简介
CJ7805 3% 是江苏长电/长晶（CJ）出品的一款固定输出线性低压差稳压器（LDO），输出电压为5.0V，额定输出电流1.5A，适用于输入电压最高35V的单通道正极稳压场合。器件采用TO-252-2 (DPAK) 封装，适合表面贴装与散热焊盘连接，面向对输出精度与电源纯净度有较高要求的工业与消费类电源设计。
二、关键性能参数
- 输出类型：固定（5.0V），输出容差3%
- 最大输入电压：35V
- 最大输出电流：1.5A
- 压差（Dropout）：2V @ 1A（即在1A负载下输入电压需高于输出电压约2V）
- 静态电流（Iq）：5mA（典型）
- 电源纹波抑制比（PSRR）：73dB @ 120Hz
- 工作温度范围（结温）：-25°C ~ +125°C
- 输出极性：正极，单通道
三、主要特性与优势
- 高输入容限（35V）适合多种高压降压前端或电池阵列供电场景。
- 优良的纹波抑制能力（73dB@120Hz），能在电源线有开关噪声或整流纹波时提供稳定、清洁的5V输出。
- 低至2V的压差在中等电流负载下保持稳定输出，但在高Vin–Vout差异和大电流时会产生显著功耗，需关注热管理。
- 典型静态电流5mA，在待机与低功耗方向表现中等，适用于对休眠电流要求不极端的系统。
四、热设计与可靠性建议
线性稳压器的功耗主要为(PD) = (Vin − Vout) × Iout。举例在极限输入35V与满载1.5A时，器件需耗散约45W的热量，单片无法散热，必须通过降低输入电压、并行散热片或改用开关降压模块来避免过热。推荐：
- PCB上预留大面积散热铜箔并通过过孔增加散热路径；
- 在常用工作点尽量使Vin接近Vout以减少功耗；
- 参考厂商数据手册进行温度升高和热阻计算，必要时做热仿真验证。
五、应用场景
适用于工业控制电源、通信设备辅助电源、仪器仪表5V供电、模拟/混合信号前端的低噪声基准供电，以及要求高输入电压余量的电源模块。对于需要长时间高效率供电或大功率耗散的场合，优先考虑开关型降压方案或混合供电拓扑。
六、使用注意事项与外围元件建议
- 输入端建议并联一个0.1µF陶瓷去耦电容紧贴器件输入引脚以抑制高频干扰；
- 输出端建议配置至少10µF低ESR电容以保证稳压器稳定性与瞬态响应（具体电容类型与ESR范围请参照数据手册）；
- 设计时注意压差与功耗的折中，避免在高差与大电流同时出现；
- 对于存在短路或过载风险的系统，应在电源设计中加入限流或保护电路，并参照CJ7805数据手册确认器件的内部保护特性。
如需器件脚位图、热阻参数、典型应用电路及完整电气特性，请参考CJ7805的官方技术手册或联系供应商获取最新数据表。
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