LM3526 Datasheet PDF – USB Power Switch and Protection

Part Number: LM3526

Function: Dual Port USB Power Switch and Over-current Protection

Package: SO-8 Pin Type

Manufacturer: Texas Instruments

Image and Pinouts:

LM3526 datasheet



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.



• 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)



1. Universal Serial Bus (USB) Root Hubs including Desktop and Notebook PC

2. High Power USB Devices Requiring In-rush Limiting

Other data sheets are available within the file:

LM3526M-H, LM3526M-H/NOPB, LM3526M-L, LM3526M-L/NOPB

LM3526 Datasheet PDF Download

LM3526 pdf