Catalog
2-ch, 0.5A loading, 2.7-5.5V, 100mΩ USB power switch
Key Features
• Compatible with USB1.1 and USB 2.01 ms Fault Flag Delay Filters Hot-Plug EventsSmooth Turn-on Eliminates In-rush Induced Voltage DropUL Recognized Component: REF# 2052021A Nominal Short Circuit Output Current Protects PC Power SuppliesThermal Shutdown Protects Device in Direct Short Condition500mA Minimum Continuous Load CurrentSmall SOIC-8 package minimizes board space2.7V to 5.5V Input Voltage Range140 mΩ Max. Switch Resistance1 µA Max. Standby Current200 µA Max. Operating CurrentUnder-voltage Lockout (UVLO)All trademarks are the property of their respective owners.Compatible with USB1.1 and USB 2.01 ms Fault Flag Delay Filters Hot-Plug EventsSmooth Turn-on Eliminates In-rush Induced Voltage DropUL Recognized Component: REF# 2052021A Nominal Short Circuit Output Current Protects PC Power SuppliesThermal Shutdown Protects Device in Direct Short Condition500mA Minimum Continuous Load CurrentSmall SOIC-8 package minimizes board space2.7V to 5.5V Input Voltage Range140 mΩ Max. Switch Resistance1 µA Max. Standby Current200 µA Max. Operating CurrentUnder-voltage Lockout (UVLO)All trademarks are the property of their respective owners.
Description
AI
The LM3526 provides Universal Serial Bus standard power switch and over-current protection for all host port applications. 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 provides individual protection to each switch and the entire device. In a short-circuit/over-current event, the switch dissipating 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 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.
The LM3526 provides Universal Serial Bus standard power switch and over-current protection for all host port applications. 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 provides individual protection to each switch and the entire device. In a short-circuit/over-current event, the switch dissipating 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 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.
