WMSIC Electronic Components

LOWPOWER LP3318B5F

ModelLP3318B5F
PackageSOT-23-5
BrandLOWPOWER
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 25+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
LOWPOWER LP3318B5F
Type
LOWPOWER
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
LOWPOWER
Electronic Component
LP3318B5F
Electronic Component
1
Package
SOT-23-5
Electronic Component
DC-DC Power Supply IC
Electronic Component
0.023g
Electronic Component
1
Type
Electronic Component
Synchronous
Electronic Component
Electronic Component
BM0228977521
Operating Temperature
40℃~+85℃
Operating Voltage
2.7V~6V
Switching Frequency
1MHz
Electronic Component
Electronic Component
Output Voltage
2.7V~36V

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

LP3318B5F 产品概述

一、概述

LP3318B5F 是微源半导体(LOWPOWER)推出的一款升压型 DC-DC 转换器,集成高效率功率开关,采用升压拓扑,适用于电池供电和便携式设备。器件工作电压范围宽(2.7V~6V),输出电压可调(2.7V~36V),开关频率为1MHz,单路输出,封装为常见的 SOT-23-5,适合空间受限的应用场景。

二、主要特性

  • 功能类型:升压型(Boost)
  • 输入电压:2.7V ~ 6V
  • 输出电压:2.7V ~ 36V(可调)
  • 开关频率:典型 1MHz,利于使用小型电感与陶瓷电容
  • 输出通道数:1 路
  • 开关管:内部集成(内置开关)
  • 封装:SOT-23-5,便于 PCB 布局与散热
  • 工作温度:-40℃ ~ +85℃

三、优势与应用场景

LP3318B5F 结合高频率与内置开关的优势,可实现小体积、高效率的升压设计,适合以下场合:

  • 便携式仪表、手持设备
  • 车载辅助电源(在规定温度范围内)
  • LED 驱动(中低功率)
  • 传感器与无线模块的供电升压

四、功能与工作原理(简述)

器件采用同步或非同步升压架构(器件内部集成功率开关),通过高频开关将输入能量存储在电感中,并在开关关断时释放至输出,配合外部电感、肖特基二极管或同步整流及输出滤波电容实现稳定升压。1MHz 的工作频率可以减少外部电感与电容尺寸,但需注意开关噪声与布局。

五、设计与使用建议

  • 外部器件:选用低 DCR 的电感(根据输出电流与效率权衡),低 ESR 陶瓷输出电容以降低纹波。
  • PCB 布局:开关节点(LX)、电感与回流电容尽量靠近,输入旁路电容靠近 VIN 与 GND。走线短且宽,避免噪声耦合。
  • 热设计:SOT-23-5 封装散热有限,高负载下注意过热保护与散热通道。
  • 启动与软启动:根据负载选择合适软启动与保护配置,避免启动时过冲。
  • 稳定性:输出电压反馈网络需按数据手册建议设计,保证环路稳定。

六、封装与环境适应性

SOT-23-5 小型封装便于移动设备集成,工作温度范围覆盖工业级常用区间(-40℃~+85℃)。在恶劣环境或高温工况下应评估降额使用或增加散热措施。

如需原理图参考、外部元件选型表或效率/纹波的典型曲线,可提供进一步应用资料与参考设计。

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