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
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
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