LM3526

LM3526 www.ti.com SNVS054E – FEBRUARY 2000 – REVISED MARCH 2013 LM3526 Dual Port USB Power Switch and Over-Current Protection Check for Samples: LM3526 FEATURES 1 2 Compatible with USB1.1 and USB 2.0 1 ms Fault Flag Delay Filters Hot-Plug Events Smooth Turn-on Eliminates In-rush Induced Voltage Drop UL Recognized Component: REF# 205202 1A Nominal Short Circuit Output Current Protects PC Power Supplies Thermal Shutdown Protects Device in Direct Short Condition 500mA Minimum Continuous Load Current Small SOIC-8 package minimizes board space 2.7V to 5.5V Input Voltage Range 140 mΩ Max. Switch Resistance 1 µA Max. Standby Current 200 µA Max. Operating Current Under-voltage Lockout (UVLO) APPLICATIONS Universal Serial Bus (USB) Root Hubs including Desktop and Notebook PC USB Monitor Hubs Other Self-Powered USB Hub Devices High Power USB Devices Requiring In-rush Limiting General Purpose High Side Switch Applications DESCRIPTION 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 s...