UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 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): June 20, 2006


                       VITESSE SEMICONDUCTOR CORPORATION
             (Exact name of registrant as specified in its charter)
                                    Delaware

                 (State or other jurisdiction of incorporation)

                 1-31614                              77-0138960
        (Commission File Number)             (IRS Employer Identification No.)

    741 Calle Plano, Camarillo, California                93012
    Address of principal executive offices)            (Zip Code)

        Registrant's telephone number, including area code:  (805) 388-3700
                                Not applicable

         (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 (see General Instruction A.2. below):

/_/ 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))

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Item 1.01     Entry into a Material Definitive Agreement.

     As previously  reported,  on June 7, 2006, Silicon Valley Bank assigned all
outstanding  loans  receivable  from  Vitesse  Semiconductor   Corporation  (the
"Company") and Vitesse International,  Inc. ("Vitesse  International") under the
Second  Amended and Restated  Loan and Security  Agreement,  dated March 2, 2006
(the  "Original  Loan  Agreement"),  to Special Value  Expansion  Fund,  LLC and
Special Value Opportunities Fund, LLC (collectively, the "Lenders"),  affiliates
of  Tennenbaum  Capital  Partners,  LLC. On June 7, 2006,  the Company,  Vitesse
International,  Vitesse  Manufacturing  &  Development  Corporation  and Vitesse
Semiconductor Sales Corporation (collectively, the "Borrowers"), the Lenders and
Obsidian , LLC, as agent and  collateral  agent (the  "Agent"),  entered  into a
Third  Amended and Restated Loan  Agreement  (the "Loan  Agreement"),  a copy of
which is attached to the  Company's  Form 8-K filed on June 12, 2006. On June 7,
2006,  the  initial  loan was made  under the Loan  Agreement  in the  amount of
approximately $22 million (the "Initial Loan").

     On June 20, 2006, the  Borrowers,  the Lenders and the Agent entered into a
Fourth  Amended and Restated Loan Agreement  (the "Amended Loan  Agreement"),  a
copy of which is attached to this Form 8-K as Exhibit  10.1 and is  incorporated
herein by reference.  The Amended Loan Agreement,  among other things,  extended
the term of the loans under the Amended Loan Agreement by one year,  revised the
terms under which loans can be prepaid and identified certain security documents
that the  Borrowers  must provide to the Lenders.  On June 20, 2006,  the second
loan was made under the Amended Loan  Agreement  in the amount of  approximately
$30 million  (the  "Second  Loan" and with the Initial  Loan,  collectively  the
"Loans").

     The Loans mature on July 15,  2011 and have an interest rate equal to LIBOR
plus 4% per annum, payable in cash, plus 5% per annum, payable in kind. Interest
will be paid quarterly.  The Company may elect, at its sole option, each quarter
to pay in kind up to 400 basis points of the cash interest  otherwise payable on
a Loan at the  following  ratio:  for each 100 basis points of cash interest the
Company  elects not to pay in cash,  the  Company  will pay 150 basis  points of
interest in kind. Thus, the Company may, at its sole option,  in any quarter pay
interest in cash at LIBOR and the  remainder of the interest in kind.  The Loans
are secured by  substantially  all the assets of the  Company.

     The  Loans  may be repaid  in whole or in part  prior to  maturity,  but if
repaid (i) prior to the second  anniversary  of the Initial  Loan, a "make-whole
premium" on the amount repaid will be payable; (ii) after the second anniversary
of the Initial Loan and prior to the third  anniversary  of the Initial Loan, at
108% of the principal  amount repaid;  (iii) after the third  anniversary of the
Initial Loan and prior to the fourth anniversary of the Initial Loan, at 104% of
the  principal  amount  repaid;  and (iv)  after the fourth  anniversary  of the
Initial Loan and prior to  maturity,  at the  principal  amount  repaid.

     At the closing of each Loan, the Lenders  received a fee equal to 4% of the
principal amount of the Loan.

     In connection with the Loans,  the Company agreed,  among other things,  to
limitations on the incurrence of  indebtedness,  transactions  with  affiliates,
fundamental changes in the Company and its business, acquisitions and changes to
the Company's subordinated debt. There are no maintenance or financial covenants
in the Amended Loan Agreement.


Item 9.01 Financial Statements and Exhibits.

(d)  Exhibits

       Item No.                       Description
     -----------                  -----------------

       10.1         Fourth  Amended and Restated  Loan Agreement, dated June 20,
                    2006,   among   Vitesse   Semiconductor Corporation, Vitesse
                    International,  Inc., Vitesse Manufacturing &    Development
                    Corporation, Vitesse Semiconductor Sales Corporation,Special
                    Value  Expansion Fund  LLC,  Special  Value   Opportunities
                    Fund,  LLC  and Obsidian, LLC


       <page>

                                   SIGNATURES

     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,  in the  City of  Camarillo,  State of
California,  on  June  26,  2006.

                        VITESSE  SEMICONDUCTOR  CORPORATION

                        By:  /s/Christopher Gardner
                            -----------------------------------------
                            Christopher Gardner
                            Chief Executive Officer

<page>

EXHIBIT                  INDEX



Item No.               Description

10.1           Fourth  Amended and Restated  Loan and  Security  Agreement,
               dated  June 7, 2006,  among  Vitesse  Semiconductor  Corporation,
               Vitesse  International,  Inc., Vitesse Manufacturing  Development
               Corporation,  Vitesse  Semiconductor  Sales Corporation,  Special
               Value Expansion Fund LLC, Special Value  Opportunities  Fund, LLC
               and Obsidian, LLC