UTC/友顺 US203AHG SOP-8 带标志的高侧电源开关

DESCRIPTION

The UTC US203AHG 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 US203AHG 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
* 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
* Protection Circuits:
- Soft-start( Hot plug-in application)
- UVLO 1.7V (TYP.)
- Current Limiting Protection
- Thermal Shutdown Protection

US203AHG典型应用电路图

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