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MICROCHIP MCP1804T-3302I/MB MCP1804T
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- MICROCHIP MCP1804T-3302I / MB
- Type
- MICROCHIP
- Minimum package
- 1000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 260mV@(20mA)
- Electronic Component
- MICROCHIP
- Electronic Component
- MCP1804T-3302I/MB
- Electronic Component
- 1
- Package
- SOT-89-3
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 0.467g
- Electronic Component
- 1
- Electronic Component
- BM0264888608
- Operating Temperature
- 40℃~+85℃@(Ta)
- Operating Voltage
- 28V
- Output
- Electronic Component
- Output Voltage
- 3.3V
- Output Current
- 150mA
- Output Type
- Electronic Component
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
MCP1804T-3302I/MB 产品概述
一、产品简介
MCP1804T-3302I/MB 是 Microchip 提供的一款高输入电压线性稳压器（LDO），为固定 3.3V 输出、单路输出的低功耗稳压器。器件支持最高 28V 的输入工作电压，封装为 SOT-89-3，适合空间受限的工业与便携类应用。器件设计注重低静态电流与良好纹波抑制，适用于供电转换、传感器与低功耗控制电路。
二、主要性能参数
- 输入电压范围：最高可承受 28V（详见厂商规格中范围与限制）
- 输出电压：固定 3.3V
- 输出电流：典型应用可达 100 mA（型号与封装限制，请参考数据表确认最大短时允许值）
- 压差（Dropout）：约 260 mV @ 20 mA，随电流增加压差上升
- 静态电流（Iq）：约 50 μA，利于电池供电场景延长待机时间
- 电源纹波抑制比（PSRR）：约 50 dB @ 1 kHz，有助于抑制输入侧噪声对敏感模拟或数字电路的影响
- 工作温度范围：-40 ℃ ~ +85 ℃（Ta）
三、保护与控制特性
器件集成多重保护及控制功能，包括热关断（Thermal Shutdown）、使能控制（Enable）、短路保护与过流保护，能够在异常工况下自动限制电流或关闭输出，从而提高系统可靠性并简化外围保护电路设计。
四、封装与应用场景
SOT-89-3 小型封装适合于空间受限但需一定功耗散热能力的电路板布局。典型应用：
- 工业控制与传感节点（28V 总线降压到 3.3V）
- 电池供电或便携式设备的 MCU/外围供电
- 模拟前端、传感器供电与接口电源
- 工业通讯模块、监测仪器等需要稳压与过载保护的场景
五、设计建议与注意事项
- 输出电容：为确保稳压器稳定与输出瞬态性能，建议在 VOUT 端使用低 ESR 陶瓷电容（典型 1 μF～10 μF），电容靠近器件引脚布置。输入端也需并联适当电容以抑制输入噪声与瞬态。具体电容值与等效串联电阻（ESR）应参照官方数据手册。
- 热管理：稳压器的功耗等于 (VIN − VOUT) × IOUT，较大压差或较高电流时需关注封装散热与 PCB 铜箔面积，以避免过热触发热关断或影响长期可靠性。
- 启用/关断：通过 EN 引脚可实现电源管理和低功耗模式，外部接口需保证 EN 电平满足逻辑阈值并考虑上电序列。
- 布局要点：输入电容与输出电容靠近相应引脚，地线要短且回流路径清晰，减少寄生阻抗以获得最佳 PSRR 与瞬态响应。
六、总结
MCP1804T-3302I/MB 结合了高输入耐压、低静态电流与多重保护特性，适用于需要在高压母线（例如 12V~28V）降压到 3.3V 的场合，尤其适合对功耗与可靠性有严格要求的工业和便携式设备。具体电气极限、封装引脚定义与典型应用电路建议，请以 Microchip 官方数据手册为准，以确保设计满足所有性能与可靠性需求。
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