It seems to be connected to D+ and D- pins of mini usb connector.
That is a common-mode choke, as the USB data pins go into one end and comes out of the other end.
It is not an ESD protection device, as the TVS diodes are the two components right next to the CM choke, connected to the connector side of the USB data pins.
The exact same arrangement is seen on the other USB connector too; four-pin CM choke and two ESD protection devices.
No way of knowing 100% for sure, but it's likely it's a ESD ic, essentially just some diodes (TVS or otherwise). Part of the standard for USB, or best practices. You won't always see it on cheaper products. It's on both the mini and full size usb port. Per the other answer, it may be common mode chokes in an IC package. Only the designers know (or requires testing and or removing parts to see).
One variation of possible connection. There are multiple types of these ICs:
More information on USB ESD protection at https://blog.semtech.com/esd-protection-of-usb-2.0-interfaces