UCC38531 Datasheet, PDF (1/4 Pages) Texas Instruments – Universal Serial Bus Power Controller

UCC38531
PRELIMINARY
Universal Serial Bus Power Controller
FEATURES
• Fully USB Compliant
• Support Four 5V Peripherals and
One USB 3.3V Controller
• Separate Power Enables
• 500mA Current Limiting per
Channel
• Separate Open Drain Fault
Indicator for Each Channel
• 3.3V Output for USB Controller
• Available in 20 Pin DIP
DESCRIPTION
The UCC38531 Power Controller is designed to provide a self powered
USB hub with a local 3.3V regulated voltage and four 5V regulated volt-
ages for USB ports. Each of the 5V output ports is individually enabled
for optimal port control. Each port also provides an overcurrent fault sig-
nal indicating that the port has exceeded a 500mA current limit. The
3.3V linear regulator is used to power the local USB microcontroller.
This regulator is protected with a 100mA current limit.
The UCC38531 is configured by connecting the VREG to a regulated
5.5V 2A source.
The 20-pin DIP package is protected by internal over-temperature shut-
down mechanism, which disables the outputs should the internal junc-
tion temperature exceed 150°C.
APPLICATION AND BLOCK DIAGRAM
11/97
UDG-97165-1