UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549


                                    FORM 8-K


                             CURRENT REPORT PURSUANT
                          TO SECTION 13 OR 15(D) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


         Date of report (Date of earliest event reported) July 19, 2006
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                               Semtech Corporation
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             (Exact Name of Registrant as Specified in Its Charter)

                                    Delaware
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                 (State or Other Jurisdiction of Incorporation)

                          1-6395                        95-2119684
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                 (Commission File Number)    (IRS Employer Identification No.)

                      200 Flynn Road
                   Camarillo, California                 93012-8790
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         (Address of Principal Executive Offices)        (Zip Code)

                                  805-498-2111
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              (Registrant's Telephone Number, Including Area Code)


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          (Former Name or Former Address, if Changed Since Last Report)

     Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions:

|_|  Written  communications  pursuant to Rule 425 under the  Securities Act (17
     CFR 230.425)

|_|  Soliciting  material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
     240.14a-12)

|_|  Pre-commencement   communications  pursuant  to  Rule  14d-2(b)  under  the
     Exchange Act (17 CFR 240.14d-2(b))

|_|  Pre-commencement   communications  pursuant  to  Rule  13e-4(c)  under  the
     Exchange Act (17 CFR 240.13e-4(c))






Item 4.02  Non-Reliance on Previously  Issued Financial  Statements or a Related
           Audit Report or Completed Interim Review.

      Item 4.02(a)

      As previously reported, the Company has been engaged in an internal review
      of its stock option practices in light of an informal SEC inquiry. On June
      9, 2006, the Audit Committee, with the assistance of independent counsel
      and forensic accountants, commenced an internal investigation of the
      Company's stock option practices and associated accounting. On July 12,
      2006, the Board of Directors appointed a Special Committee to continue the
      Audit Committee investigation. The Special Committee is comprised of
      members who had not served the Company or the Board in any capacity prior
      to December 2002. The Special Committee has not completed its work or
      reached final conclusions and is continuing its investigation.

      The initial phase of the investigation has focused on the processes used
      to establish option exercise prices and obtain approvals of stock option
      grants, including procedures relating to initial stock option grants to
      newly-hired employees, and the related measurement dates used for
      financial reporting purposes. Although the investigation is ongoing, the
      Committee has concluded that, pursuant to the requirements of Accounting
      Principles Board Opinion No. 25, Accounting for Stock Issued to Employees
      (APB 25), the accounting measurement dates for certain stock options
      granted primarily during fiscal years 1998 through 2003 (which roughly
      correspond to calendar years 1997 through 2002) differ from the
      measurement dates previously used for such awards. As a result, new
      accounting measurement dates will apply to the affected option grants.

      Consequently, the Company expects to record additional non-cash
      compensation expense and expects the amount of such additional expense to
      be material. The tax consequences that may result from these matters have
      not yet been determined. As a result of these adjustments, the Company
      expects to restate its financial statements for fiscal years 2002 through
      2006. The restatement will also affect financial statements for earlier
      fiscal years and adjustments for those earlier years will be reflected as
      part of the opening balances in the financial statements for the
      restatement period.

      The Company believes that the additional non-cash compensation expense
      under APB 25 will not affect its current cash position or previously
      reported revenues. Although future operating results are not expected to
      be significantly impacted by the adjustments related to past stock option
      practices, expenses arising from management's review, the Special
      Committee's investigation, related litigation and other associated
      activities will be recorded in the periods incurred and are expected to be
      significant.

      Management, the Special Committee and the Audit Committee have discussed
      the above matters with Ernst & Young LLP, the Company's independent
      registered public accounting firm.

      On July 19, 2006 the Board of Directors, in consultation with management,
      the Audit Committee, and the Special Committee and with the concurrence of
      Ernst & Young LLP, determined that financial statements and the related
      reports of its independent public accountants, earnings press releases,
      and similar communications previously issued by the Company should not be
      relied upon due to the pending restatement of its historical financial
      statements.

      Because the review is still ongoing, the aggregate amount of additional
      non-cash stock-based compensation expense has not been determined, nor has
      the amount of such expense to be recorded in any specific period or in any
      future period been determined.

      Management is evaluating the impact of this matter on its internal
      controls over financial reporting and its reports thereon for fiscal years
      2005 and 2006. The Company's disclosure controls and procedures are also
      being reevaluated.

      The Special Committee is working to complete its investigation in a timely
      manner and the Company intends to file its restated financial statements
      and its quarterly report for the period ended April 30, 2006 as soon as
      practicable after the Special Committee's investigation is concluded. As
      previously announced, the Company received a Staff Determination letter
      from Nasdaq on June 15, 2006 indicating that the Company's securities are
      subject to delisting because the Company has not yet filed its Form 10-Q
      for the fiscal quarter ended April 30, 2006 and is therefore not in
      compliance with the continued listing standard in Nasdaq Marketplace Rule
      4310(c)(14). The Company has requested a hearing before a Nasdaq Listing
      Qualifications Panel ("Panel") to review the Staff Determination. At the
      hearing, which will occur within the next two weeks, the Company will ask
      the Panel for additional time to remedy the late filing and to restate its
      financial statements. There can be no assurance that the Panel will grant
      the additional time or that the Company will maintain its Nasdaq listing.


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       The press  release  issued by the Company on July 20, 2006 in  connection
       with this matter is attached hereto as Exhibit 99.1

Item 8.01.  Other Events

      The Company has been served with a third stockholder derivative lawsuit
      related to stock option practices, which was filed in the United States
      District Court for the Central District of California. This case, which
      names the Company as a nominal defendant, seeks to bring derivative claims
      on behalf of the Company against certain of its present and former
      directors and executive officers. The Company is evaluating the lawsuit
      and will respond to it in due course.

Item 9.01.  Financial Statements and Exhibits

      (c)  Exhibits

          Exhibit 99.1     Press Release of the Company dated July 20, 2006





                                    SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

Date: July 20, 2006                 SEMTECH CORPORATION


                                    By:   /s/   David G. Franz, Jr.
                                       -----------------------------
                                         David G. Franz, Jr.
                                         Chief Financial Officer

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                                INDEX TO EXHIBITS


Exhibit Number             Description of Document
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Exhibit 99.1               Press Release of the Company dated July 20, 2006

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