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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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LM3526MX-L bảng dữ liệu(PDF) 1 Page - National Semiconductor (TI) |
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LM3526MX-L bảng dữ liệu(HTML) 1 Page - National Semiconductor (TI) |
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1 / 11 page  LM3526 Dual Port USB Power Switch and Over-Current Protection General Description 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. 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. 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. The small size, low R ON, 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. Features n 1 ms fault flag delay filters Hot-Plug events 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 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 m Ω Max. switch resistance n 1 µA Max. standby current n 200 µA Max. operating current n Under-voltage lockout (UVLO) Applications n Universal Serial Bus (USB) Root Hubs including Desktop and Notebook PC 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 DS101097-1 DS101097-2 LM3526-H DS101097-40 DS101097-28 LM3526-L February 2000 © 2000 National Semiconductor Corporation DS101097 www.national.com |
Số phần tương tự - LM3526MX-L |
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Mô tả tương tự - LM3526MX-L |
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