FIXED CURRENT LIMIT POWER DISTRIBUTION SWITCH
DESCRIPTION
UTC US2005 is a low voltage cost-effective high-side power switch
with current limiting function. It is particularly suitable for general
purpose power distribution and control in digital televisions (DTV),
printers, set top boxes (STB), PCs, PDAs, and other peripheral devices.
UTC US2005 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 80μA making this device
ideal for portable battery-operated equipment.
UTC US2005 allows momentary high current surges to pass
unrestricted without sacrificing overall system safety. It also allows
output slew rate limiting by an external capacitor.
FEATURES
* Built-in 80mΩ N-MOSFET
* Open-drain fault flag output to Indicate fault conditions
* Input voltage varies from 2.5V to 5.5V
* 80μA low quiescent current
* Current limit values of 0.5A, 0.8A, and 1.2A
* Automatic-on output after fault
* Thermal protection
* Under voltage lock-out (UVLO) |
