Cypress has always been in the top in the USB host/hub/periferal controller market.
Cypress HX3 is what you are looking for. fullUSB uplink and several usb2 ports
Unfortunately no, it isn't.
I may need to explain myself more clearly;
I am looking for a chip/solution that does the following;
USB 3 transceiver to provide high bandwidth connectivity between the host and the "glue logic"
"glue logic" that takes the USB 3 PIPE connection, processes it, provides an interface for a number of USB 2 controllers
A number of USB 2 controllers that interface with the glue logic to provide several full bandwidth USB 2 ports.
Why am I looking for such a thing?
USB 3 provides a flexible, high bandwidth, common, external interface. USB 2 provides a flexible, medium bandwidth, common, cheap, external interface.
As the bandwidth provided by USB 3 is an order of magnitude higher than that of USB 2, it makes sense to use it to provide the bandwidth to downstream USB 2 ports.
Basically any USB 3+USB 2 hub application would prove useful for this design/configuration, Eg, you have an external USB 2 hard drive and an external USB 2 flash drive, both can saturate the bandwidth of a USB 2 connection. If you wish to transfer a file from one device to the other, you will be limited to the bandwidth of the USB hub/controller they are connected to, divided between the two devices, in this case, since they can both saturate a USB 2 connection, their bandwidth is halved. This is significant, and this is directly using the device on the USB host controller (on a root hub ofc), let along using the devices on an external USB hub.
Why the HX3 and similar products don't work;
They provide two separate interfaces and two separate hubs. Essentially, they have both a USB 2 and a USB 3 connection going to them, which is then sent to it's respective hub. Logic then decides based on what is plugged into the port as to which hub the port is connected to. This means although there is a 5gbit connection between the "chip", the bandwidth available for USB 2 is only 480mbit, which is shared amongst the USB 2 ports.