Exhibit 99.1

        Semtech Announces Additional $50 Million Stock Buyback

    CAMARILLO, Calif.--(BUSINESS WIRE)--July 6, 2005--Semtech
Corporation (Nasdaq:SMTC) today announced that its Board of Directors
has authorized an additional $50 million for the Company's current
stock buyback program. The program authorizes the repurchase of common
stock from time to time through negotiated or open market
transactions.
    The Company recently exhausted the initial $50 million authorized
when the program was established in February 2004. Due in part to the
cash generation characteristics of Semtech's business model, the
Company has spent more than $100 million in the last five years to
repurchase shares of its common stock through various buyback
programs.

    About Semtech

    Semtech Corporation is a leading supplier of high-performance
analog and mixed-signal semiconductors used in a wide range of
computer, industrial and communication applications. Publicly traded
since 1967, Semtech is listed on the Nasdaq National Market under the
symbol SMTC.

    CONTACT: Semtech Corporation
             John Baumann, 805-480-2010