EXHIBIT 99.1

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

I, Steve Sanghi, certify, pursuant to 18 U.S.C. Section 1350, as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Annual
Report of Microchip Technology Incorporated on Form 10-K for the period ended
March 31, 2003 fully complies with the requirements of Section 13(a) or 15(d) of
the Securities Exchange Act of 1934 and that information contained in such Form
10-K fairly presents, in all material respects, the financial condition and
results of operations of Microchip Technology Incorporated.


                           By: /s/ Steve Sanghi
                               -------------------------------------------------
                               Name: Steve Sanghi
                               Title: President and Chief Executive Officer
                               Date: June 5, 2003


I, Gordon W. Parnell, certify, pursuant to 18 U.S.C. Section 1350, as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Annual
Report of Microchip Technology Incorporated on Form 10-K for the period ended
March 31, 2003 fully complies with the requirements of Section 13(a) or 15(d) of
the Securities Exchange Act of 1934 and that information contained in such Form
10-K fairly presents, in all material respects, the financial condition and
results of operations of Microchip Technology Incorporated.


                           By: /s/ Gordon W. Parnell
                               -------------------------------------------------
                               Name: Gordon W. Parnell
                               Title: Vice President and Chief Financial Officer
                               Date: June 5, 2003