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LM3526

更新时间: 2024-01-27 18:48:28
品牌 Logo 应用领域
美国国家半导体 - NSC 开关电源开关
页数 文件大小 规格书
11页 326K
描述
Dual Port USB Power Switch and Over-Current Protection

LM3526 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active零件包装代码:SOIC
包装说明:SOP,针数:8
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01Factory Lead Time:6 weeks
风险等级:0.5内置保护:TRANSIENT; OVER CURRENT; THERMAL; UNDER VOLTAGE
驱动器位数:2输入特性:STANDARD
接口集成电路类型:BUFFER OR INVERTER BASED PERIPHERAL DRIVERJESD-30 代码:R-PDSO-G8
JESD-609代码:e3长度:4.9 mm
湿度敏感等级:1功能数量:1
端子数量:8最高工作温度:125 °C
最低工作温度:-40 °C输出特性:OPEN-DRAIN
输出电流流向:SOURCE标称输出峰值电流:1.2 A
封装主体材料:PLASTIC/EPOXY封装代码:SOP
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):260认证状态:Not Qualified
座面最大高度:1.75 mm最大压摆率:0.2 mA
最大供电电压:5.5 V最小供电电压:2.7 V
标称供电电压:5 V表面贴装:YES
温度等级:AUTOMOTIVE端子面层:Matte Tin (Sn)
端子形式:GULL WING端子节距:1.27 mm
端子位置:DUAL处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:3.9 mmBase Number Matches:1

LM3526 数据手册

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February 2000  
LM3526  
Dual Port USB Power Switch and Over-Current  
Protection  
General Description  
Features  
n 1 ms fault flag delay filters Hot-Plug events  
The LM3526 provides Universal Serial Bus standard power  
switch and over-current protection for all host port applica-  
tions. The dual port device is ideal for Notebook and desktop  
PC’s that supply power to more than one port.  
n Smooth turn-on eliminates in-rush induced voltage drop  
n UL recognized component: REF 205202  
n 1A nominal short circuit output current protects PC  
power supplies  
n Thermal shutdown protects device in direct short  
condition  
#
A 1 ms delay on the fault flag output prevents erroneous  
overcurrent reporting caused by in-rush currents during  
hot-plug events.  
The dual stage thermal protection circuit in the LM3526 pro-  
vides individual protection to each switch and the entire de-  
vice. In a short-circuit/over-current event, the switch dissipat-  
ing excessive heat is turned off, allowing the second switch  
to continue to function uninterrupted.  
n 500mA minimum continuous load current  
n Small SO-8 package minimizes board space  
n 2.7V to 5.5V input voltage range  
n 140 mMax. switch resistance  
n 1 µA Max. standby current  
The LM3526 accepts an input voltage between 2.7V and  
5.5V allowing use as a device-based in-rush current limiter  
for 3.3V USB peripherals, as well as Root and Self-Powered  
Hubs at 5.5V. The Enable inputs accept both 3.3V and 5.0V  
logic thresholds.  
n 200 µA Max. operating current  
n Under-voltage lockout (UVLO)  
Applications  
n Universal Serial Bus (USB) Root Hubs including  
Desktop and Notebook PC  
The small size, low RON, and 1 ms fault flag delay make the  
LM3526 a good choice for root hubs as well as per-port  
power control in embedded and stand-alone hubs.  
n USB Monitor Hubs  
n Other Self-Powered USB Hub Devices  
n High Power USB Devices Requiring In-rush Limiting  
n General Purpose High Side Switch Applications  
Typical Operating Circuit and Connection Diagram  
DS101097-2  
LM3526-H  
DS101097-1  
DS101097-40  
DS101097-28  
LM3526-L  
© 2000 National Semiconductor Corporation  
DS101097  
www.national.com  

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