This excerpt taken from the MRVL 10-K filed Apr 13, 2006.
DSP Switcher Integrated Regulator Modules. DSP Switcher integrated regulator modules provide plug-and-play implementations of our switching regulator integrated circuits in convenient, modular form factors. The same benefits in performance efficiency, precision, transient response and small size are preserved while providing a fully assembled, tested and guaranteed power supply. We offer single in-line package, dual in-line package, or surface mount technology form factors that can be combined with a single programming resistor to set the desired output voltage. A full range of output voltages are supported with one part number.
Based on our operational management and financial reporting structure, we have determined that we operate in one reportable business segment: the design, development and sale of integrated circuits. Please see the financial information regarding this reportable business segment set forth in Item 7 of this Form 10-K and the information regarding our net revenue and long-lived assets based on geographic regions included in Note 12 to our Consolidated Financial Statements set forth in Item 8 of this Form 10-K.