DATA SHEET D LND3526H/L-/CB DUAL USB POWER CONTROL SWITCH GENERAL DESCRIPTION The LND3526, is a dual high side power control switch, with independent enable and flag functions optimized for self powered and bus- powered universal serial bus (USB) applications. The LND3526 satisfies the following USB requirements: Each switch channel supplies up to 500mA with internal circuitry limiting the fault current to 750mA. The switch’s 140mΩ on- resistance meets USB voltage drop requirements. A flag output is available to indicate fault conditions to the local USB controller. Additional features include: UVLO to ensure that the device remains off until there is a valid input voltage present, thermal shutdown to prevent switch failure from high current loads and 3.3V and 5V logic compatible enable inputs. The LND3526H/L-CB provides additional circuit breaker functionality if desired. The LND3526 is available in active-high and activelow versions in 8-pin die and SOIC packages. OPERATING WAVEFORMS FEATURES • • • • • • • • • • • • USB specification compliant 2.7 to 5.5V operating range 2 independent switches 140 mΩ maximum on-resistance Active-high or active-low ENABLE versions Independent open drain fault flag pins 500mA continuous load current per switch Thermal shutdown Reverse Blocking Soft Start Fault flag with deglitch filter Drop in replacement for industry standard footprints APPLICATIONS USB host and self powered hubs USB bus-powered hubs USB monitors, printers, cameras and other USB controlled peripherals Hot plug-in power supplies Battery charger circuits PINOUT Linear Dimensions Semiconductor Inc. 22620 Ricardo Rd, Cupertino CA 95014 USA tel 312.321.1810 fax 312.321.1830 www.lineardimensions.com