1 Features

1• Powered From Thunderbolt™ Bus

• 2.5-V to 15.75-V Input

• 3.3-V Outputs

• Cable Power Out Current Limit

• Thermal Shutdown

2 Applications

• Thunderbolt™/Thunderbolt™ 2 Systems

• Bus Powered Systems

• Power Management Systems

3 Description

The TPS65980 DC/DC switching regulator that

receives power from a Thunderbolt™ or Thunderbolt™ 2 power bus ranging from 2.5-V to

15.75-V and generates three separate 3.3-V supply

outputs.

The TBT_OUT supply provides power to the local

peripheral Thunderbolt™ controller and support

circuitry. The CBL_OUT supply provides power back

to the Thunderbolt™ cable and has adjustable current limit. The DEV_OUT supply provides power to all

other circuitry in the device to perform its designed

function.

The TPS65980 is available in a 24-pin

5mm x 4mm x 0.9mm VQFN package.