Not from what I have read. But it should be possible to have Mobile Infantry as per Starship Troopers (the book rather than the 'standing in line like infantry at Waterloo firing MGs at bugs' film ). M1A1 TC in his post below has put up some links to how MI (as per the book) are supposed to look: guys in deep sea diving rig with rocket packs and lasers.
In effect MI are more like vehicles than infantry as we understand them in the 21stC. They are very small compared to a vehicle; but slightly less able to find ground cover than an true infantryman due to their larger profile. Their small size of course makes then much harder to acquire as a target than a vehicle.
Their armour is relatively light. Although it can defeat less challenging attacks (equivalent 20thC .50 cal; fragmentation; small bug pincers etc) it is vulnerable to any 'modern' anti-armour attack.
MI's true strength is their agility. Their ability to duck into dead ground (re-entrants etc) and rapidly jet to a new firing position make them a formidable opponent. Think of them as tiny attack helicopters.
But as a result of trade-offs with power to weight they are, compared to a vehicle, underarmed (unless using tac nukes!) and underarmoured. Similarly their sensor suite does not have the range and platform stability that would be found in a heavier ground vehicle. This means that they can be outranged and outgunned by ground vehicles where ground cover is not available: they are not suitable for those resource rich but flat desert planets!
Another MI strength is their shared situational awareness derived from networked sensors and communications: MI have borg spotting capability as standard!
Bring 'em on!