The head of Dell’s mobile device division, Ron Garriques, has decided to leave the company, Dell revealed in a document filed with the SEC yesterday.

Garriques is president of Dell’s Communications Solutions division, which headed up the development of the Dell Streak and the Dell Venue Pro. He will remain at the company until Jan. 28, 2011, after which he will serve as a consultant until the end of next year.

Garriques will receive a severance package of $1.44 million and two lump payments of $3.15 million for his consulting services over the next year. Dell hired Garriques in February 2007 to head a new group comprised of Dell’s consumer products. Garriques came to Dell from Motorola, where he was president of Motorola’s mobile device unit.

The Wall Street Journal reports that Garriques’ unit will be disbanded after his departure, with the products becoming parts of other units. Dell could not be reached to confirm the report.

Dell’s mobile device sales have comprised a small part of the company’s overall revenue stream, which is promised of laptops, PCs, printers and other consumer electronics.