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LM3526M-H/NOPB-LM3526MX-H/NOPB-LM3526MX-L/NOPB
Dual Port USB Power Switch and Over-current Protection 8-SOIC -40 to 125
LM3526
www.ti.com SNVS054E–FEBRUARY 2000–REVISED MARCH 2013
LM3526 Dual Port USB Power Switch and Over-Current Protection
Checkfor Samples: LM3526
1FEATURES DESCRIPTIONThe LM3526 provides Universal Serial Bus standard
Compatible with USB1.1 and USB 2.0 power switch and over-current protection forall host
• 1 ms Fault Flag Delay Filters Hot-Plug Events port applications. The dual port deviceis ideal for
Smooth Turn-on Eliminates In-rush Induced Notebook and desktop PC's that supply powerto
Voltage Drop more than one port.
UL Recognized Component: REF# 205202 A1 ms delay on the fault flag output prevents
erroneous overcurrent reporting caused by in-rush
• 1A Nominal Short Circuit Output Currentcurrents during hot-plug events.
Protects PC Power Supplies Thermal Shutdown Protects Devicein Direct The dual stage thermal protection circuit in the
Short Condition LM3526 provides individual protectionto each switch
and the entire device.Ina short-circuit/over-current
• 500mA Minimum Continuous Load Current event, the switch dissipating excessive heatis turned
• Small SOIC-8 package minimizes board space off, allowing the second switchto continueto function
2.7Vto 5.5V Input Voltage Range uninterrupted.
140 mΩ Max. Switch Resistance The LM3526 accepts an input voltage between 2.7V
1µA Max. Standby Current and 5.5V allowing use asa device-based in-rush
current limiter for 3.3V USB peripherals, as well as
• 200µA Max. Operating Current Root and Self-Powered Hubsat 5.5V. The Enable
• Under-voltage Lockout (UVLO) inputs accept both 3.3V and 5.0V logic thresholds.
The small size, low RON, and1 ms fault flag delay
APPLICATIONS make the LM3526a good choicefor root hubsas well
• Universal Serial Bus (USB) Root Hubs as per-port power controlin embedded and stand-
including Desktop and Notebook PC alone hubs.
USB Monitor Hubs Other Self-Powered USB Hub Devices High Power USB Devices Requiring In-rush
Limiting General Purpose High Side Switch
