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JSMSEMI SXL1509-3.3E1 SXL1509
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- JSMSEMI SXL1509-3.3E1
- Type
- JSMSEMI
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- JSMSEMI
- Electronic Component
- SXL1509-3.3E1
- Electronic Component
- 1
- Package
- SOP-8
- Electronic Component
- DC-DC Power Supply IC
- Electronic Component
- 0.216g
- Electronic Component
- 1
- Features
- Electronic Component
- Type
- Electronic Component
- Synchronous
- Electronic Component
- Electronic Component
- BM0257688695
- Operating Temperature
- 40℃~+125℃
- Operating Voltage
- 4.5V~40V
- Switching Frequency
- 127kHz~173kHz
- Electronic Component
- Electronic Component
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SXL1509-3.3E1 产品概述
一、产品概述
SXL1509-3.3E1 是一款降压型（Buck）开关稳压器，集成高侧开关管，输出固定 3.3V，最大输出电流可达 3A。输入电压范围宽（4.5V ～ 40V），适用于 12V、24V 等典型工业与通信电源母线。该器件为非同步整流结构（需外接肖特基二极管），工作开关频率在 127kHz ～ 173kHz 之间，静态工作电流（Iq）约 10mA，适合需稳压且能接受中等效率折衷的应用场合。封装为 SOP-8，工作温度范围 -40℃～+125℃。
二、主要特性
- 功能类型：降压型（Buck），固定输出 3.3V；
- 输入电压：4.5V ～ 40V，适应宽范围母线；
- 输出电流：最高 3A（需合理散热设计以保证持续输出）；
- 开关频率：127kHz ～ 173kHz，有利于电感与电容的尺寸选择与 EMI 管理；
- 同步整流：否（需外接低压降肖特基二极管）；
- 静态电流：约 10mA（空载功耗中等）；
- 封装：SOP-8，便于通用 PCB 组装；
- 工作温度：-40℃～+125℃，适合工业级应用。
三、典型应用
- 工业控制与通信设备的 3.3V 辅助电源；
- 24V/12V 母线到 3.3V 的点对点电源转换；
- 嵌入式系统、传感器节点及供电模块（需评估热设计）；
- 需求宽输入且对成本、零件数有要求的中低功率场合。
四、设计要点与外部元件选择
- 整流二极管：由于为非同步结构，建议选用低正向压降、高速肖特基二极管，电流额定值应不小于输出电流且耐压高于最大输入电压；
- 电感：按开关频率与允许电流纹波（通常取 20%～40% Iout）选择电感值与饱和电流等级；电感饱和后会显著影响性能；
- 输出电容：选用低 ESR 的固态电解或陶瓷电容以降低输出纹波并保证稳定性；输入侧需并联合适的去耦电容抑制感性阻抗与瞬态；
- PCB 布局：输入电容、开关节点和二极管应尽量靠近器件引脚并缩短回流环路；大面积铜箔有利于散热与功率回流；
- 保护与滤波：根据系统需要增加输入滤波、浪涌抑制和软启动电路，必要时在输出端增加过流或过温保护措施。
五、封装与热管理
SOP-8 封装便于安装但散热能力有限；在高输入差分（Vin 高且 Vout 低）和大电流工作条件下，器件功耗显著，需通过扩大 PCB 铜箔、增加散热过孔、放置在散热良好的板区等方式提升散热，保证器件结温在安全范围内，以保证长期可靠性。
六、可靠性与使用建议
在设计中应注意器件在高 Vin 与满载工况下的功率损耗、二极管发热与整体系统效率；如需车规级应用或更高效率，建议评估同步整流或更低静态电流的替代方案。使用前请参考 JSMSEMI 官方数据手册以获得完整电气参数、典型应用电路、布线建议及各类保护特性说明。
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