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Siproin SSP7903P33FR
Configuration
1 options
Configuration
Option 165627
Availability on request
Technical data
Product details
19
specifications
Core information
- Product name
- Siproin SSP7903P33FR
- Type
- SIPROIN
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 1.5V@(1A)
- Electronic Component
- SIPROIN
- Electronic Component
- SSP7903P33FR
- Electronic Component
- 1
- Package
- SOT-223
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 0.28g
- Electronic Component
- 1
- Electronic Component
- BM0230856425
- Operating Temperature
- 40℃~+85℃@(Ta)
- Operating Voltage
- 40V
- Output
- Electronic Component
- Output Voltage
- 3.3V
- Output Current
- 1A
- 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.
SSP7903P33FR 产品概述
一、产品简介
SSP7903P33FR 是上海矽朋（Siproin）推出的一款高压线性稳压器（LDO），固定输出 3.3V，最大输出电流 1A，最高输入耐压可达 40V，封装为 SOT-223。器件集成了过热保护（OTP）、过流保护（OCP）及短路保护（SCP），适用于工业与汽车类高压供电场合的降压稳压场景。
二、主要参数
- 输出类型：固定（3.3V）
- 工作电压（最大输入电压）：40V
- 输出电压：3.3V
- 输出电流：1A（最大）
- 压差：1.5V @ 1A（典型工况）
- 保护功能：过热、过流、短路保护
- 工作温度：-40℃ ~ +85℃（Ta）
- 输出极性：正极
- 输出通道：1 路
- 封装：SOT-223
三、应用场景
适用于需要从高电压母线（例如车载 12–24V、某些工业 24–36V 或更高直流母线）向 3.3V 数字/模拟电路供电的场合。典型应用包括工业控制模块、通信设备前端、传感器供电、低速 MCU 或接口芯片电源等。
四、设计与注意事项
- 输入电压须大于 Vout + Vdrop（至少约 4.8V 在最大负载下），且不可超过 40V。
- 功耗与散热：线性稳压功耗 Pd=(Vin–Vout)×Iout。举例：若 Vin=12V，Vout=3.3V，Iout=1A，则 Pd≈8.7W，需良好散热（大铜箔、热沉或底板散热），并参考器件数据手册的 RθJA/RθJC 参数进行结温计算与热结设计。
- 输出与输入旁路：建议在靠近引脚处并联使用陶瓷和电解/钽电容（例如输入端 10µF 陶瓷或电解，输出端 10–47µF 低 ESR 电容，具体数值依数据手册稳定性要求调整）。
- 抗突波措施：对于有瞬态高压或反向电压的环境，推荐在输入端加入 TVS 二极管与浪涌吸收元件，避免瞬态超过 40V。
- PCB 布局：输入/输出走线尽量短且加宽，SOT-223 引脚与焊盘采用热过孔或大面积铜箔以提高散热能力，地线采用单点或低阻抗大面。
五、选型建议与验证
- 若系统输入电压较高且负载电流接近 1A，应优先评估功耗与散热方案，或考虑开关降压+后端 LDO 的混合方案以降低整体损耗。
- 在最终定型前，务必根据 SSP7903P33FR 的完整数据手册进行 RθJA、启动特性、瞬态响应和保护门限的验证，并在目标温度范围内做热稳态与动态负载测试。
总结：SSP7903P33FR 为一颗高压耐受、具完整保护机制的 3.3V/1A 线性稳压器，适合对噪声、纹波容忍度高且对散热有相应设计的工业与车载类应用。使用时重点关注输入瞬态保护与热管理。
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