Exhibit 99.1

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

         In connection with the Annual Report of Vicor Corporation (the
"Company") on Form 10-K for the period ending December 31, 2002 as filed with
the Securities and Exchange Commission on the date hereof (the "Report"), I,
Patrizio Vinciarelli, Chief Executive Officer of the Company, certify, pursuant
to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, that:

            (1)    The Report fully complies with the requirements of section 13
                   (a) or 15 (d) of the Securities Exchange Act of 1934; and

            (2)    The information contained in the Report fairly presents, in
                   all material respects, the financial condition and results of
                   operations of the Company.

/s/ Patrizio Vinciarelli
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Patrizio Vinciarelli
President, Chairman of the Board and
Chief Executive Officer

March 19, 2003