RT9711應(yīng)用電路及參數(shù)資料

Theis a low voltage, single N-MOSFET high-side power switch, optimized for self-powered and bus- powered Universal Serial Bus (USB) applications. The RT9711 equipped with a charge pump circuitry to drive the internal MOSFET switch; the switch's low RDS(ON), 80mW, meets USB voltage drop requirements; and a flag output is available to indicate fault conditions to the local USB controller.
Additional features include soft-start to limit inrush current during plug-in, thermal shutdown to prevent catastrophic switch failure from high-current loads, under-voltage lockout (UVLO) to ensure that the device remains off unless there is a valid input voltage present. The maximum current is limited to typically 2.5A in dual ports in accordance with the USB power requirements, lower quiescent current as 25uA making this device ideal for portable battery-operated equipment.

The RT9711 is available in SOT-23-5 and SOP-8 packages requiring minimum board space and smallest components.

Features

? Compliant to USB Specifications
? Built-In N-MOSFET
? Typical RDS(ON) : 80mW (SOT-23-5), 90mW (SOP-8)
? Output Can Be Forced Higher Than Input (Off-State)
? Low Supply Current :
25uA Typical at Switch On State
1uA Typical at Switch Off State
? Guaranteed 1.5A Continuous Load Current
? Wide Input Voltage Ranges : 2.5V to 5.5V
? Open-Drain Fault Flag Output
? Hot Plug-In Application (Soft-Start)
? 1.7V Typical Under-Voltage Lockout (UVLO)
? Current Limiting Protection
? Thermal Shutdown Protection
? Reverse Current Flow Blocking (no body diode)
? UL Approved-E219878
? RoHS Compliant and 100% Lead (Pb)-Free

Application

? USB Bus/Self Powered Hubs
? USB Peripherals
? ACPI Power Distribution
? PC Card Hot Swap
? Notebook, Motherboard PCs
? Battery-Powered Equipment
? Hot-Plug Power Supplies
? Battery-Charger Circuits

Typical Applications Circuit