US203

UNISONIC TECHNOLOGIES CO., LTD US203 CMOS IC HIGH-SIDE POWER SWITCHES WITH FLAG  DESCRIPTION The UTC US203 are low voltage cost-effective high-side power switches with flag function. These devices are particularly suitable for self-powered and bus-powered USB applications. The build-in N-MOSFET’s RDS(ON) which meets the requirements of USB voltage drop is as low as 80mΩ. The UTC US203 contains a charge pump circuitry to drive the internal MOSFET switch and also incorporate such protection circuits: soft-start circuit protect these devices from being damaged by limiting inrush current during plug-in; thermal shutdown circuit is used to prevent catastrophic switch failure from high-current loads. UVLO is used to ensure that the device remains off unless there is a valid input voltage present. A flag output is designed to indicate fault conditions to the local USB controller. lower quiescent current as 25μA making this device ideal for portable battery-operated equipment. The UTC US203 are applied in USB Bus/Self powered hubs, USB peripherals, NB, PCs, PC card hot swap, battery-powered equipment, hot-plug power supplies, battery-charger circuits, ACPI power distribution.  FEATURES 1 SOP-8 4 5 123 SOT-25 MSOP-8 * Input Voltage Varies From 3.5V to 5.5V * Built-in N-MOSFET * Output Can Be Forced Higher Than Input (Off-State) * Typical Low Supply Current: - Switch On: 25μA (TYP) - Switch Off: 0.1μA (TYP) * Open-Drain Fault Flag Output To Indicate Fault Conditions * Protecti...