General Description
The RT9702 and RT9702A are cost-effective, low voltage,
single N-Channel MOSFET high-side power switches,
optimized for self-powered and bus- powered Universal
Serial Bus (USB) applications. The RT9702/A equipped
with a charge pump circuitry to drive the internal MOSFET
switch; the switch's low RDS(ON), 80mΩ, 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, fault current
is limited to typically 800mA for RT9702 in single port and
1.5A for RT9702A 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 RT9702/A is available in SOT-23-5 and TSOT-23-5
packages requiring minimum board space and smallest
components.