UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No.   )

Filed by the Registrant  x                              Filed by a Party other than the Registrant  ¨

Check the appropriate box:

¨ Preliminary Proxy Statement

¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

¨ Definitive Proxy Statement

x Definitive Additional Materials

¨ Soliciting Material Pursuant to §240.14a-12

Applied Micro Circuits Corporation

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

x No fee required.

¨ Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and 0-11.

(1) Title of each class of securities to which transaction applies:

(2) Aggregate number of securities to which transaction applies:

(3) Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (set forth the amount on which the filing fee is calculated and state how it was determined):

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(5) Total fee paid:

¨ Fee paid previously with preliminary materials.

¨ Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.

(1) Amount Previously Paid:

(2) Form, Schedule or Registration Statement No.:

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(4) Date Filed:

*** Exercise Your Right to Vote ***

Important Notice Regarding the Availability of Proxy Materials for the Shareholder Meeting to Be Held on August 16, 2011.

APPLIED MICRO CIRCUITS CORP.

215 MOFFETT PARK DRIVE SUNNYVALE, CA 94089

Meeting Information

Meeting Type: Annual Meeting

For holders as of: June 20, 2011

Date: August 16, 2011 Time: 10:00 a.m., PDT Location: Company’s Corporate Headquarters 215 Moffett Park Drive Sunnyvale, CA 94089

You are receiving this communication because you hold shares in the above named company.

This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. You may view the proxy materials online at www.proxyvote.com or easily request a paper copy (see reverse side).

We encourage you to access and review all of the important information contained in the proxy materials before voting.

See proxy the materials reverse side and of voting this notice instructions to obtain .

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Before You Vote

How to Access the Proxy Materials

Proxy Materials Available to VIEW or RECEIVE:

NOTICE AND PROXY STATEMENT/10-K COMBO ANNUAL REPORT

How to View Online:

Have the information that is printed in the box marked by the arrow XXXX XXXX XXXX (located on the following page) and visit: www.proxyvote.com.

How to Request and Receive a PAPER or E-MAIL Copy:

If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for requesting a copy. Please choose one of the following methods to make your request:

1) BY INTERNET: www.proxyvote.com

2) BY TELEPHONE: 1-800-579-1639

3) BY E-MAIL*: sendmaterial@proxyvote.com

* If requesting materials by e-mail, please send a blank e-mail with the information that is printed in the box marked by the arrow XXXX XXXX XXXX (located on the following page) in the subject line.

Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. Please make the request as instructed above on or before August 2, 2011 to facilitate timely delivery.

How To Vote

Please Choose One of the Following Voting Methods

Vote In Person: Many shareholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares.

Vote By Internet: To vote now by Internet, go to www.proxyvote.com. Have the information that is printed in the box marked by the arrow XXXX XXXX XXXX available and follow the instructions.

Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card.

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Voting Items

THE BOARD OF DIRECTORS RECOMMENDS A VOTE FOR EACH OF THE NOMINEES LISTED BELOW

1. To elect as Directors of Applied Micro Circuits Corporation the nominees listed below.

1a. Cesar Cesaratto

1b. H.K. Desai

1c. Paramesh Gopi, Ph.D.

1d. Paul R. Gray, Ph.D.

1e. Fred Shlapak

1f. Arthur B. Stabenow

THE BOARD OF DIRECTORS RECOMMENDS A VOTE FOR PROPOSAL 2

2. To ratify the selection of KPMG LLP as the Company’s independent registered public accounting firm for the fiscal year ending March 31, 2012.

THE BOARD OF DIRECTORS RECOMMENDS A VOTE FOR PROPOSAL 3

3. To approve and adopt the Applied Micro Circuits Corporation 2011 Equity Incentive Plan.

THE BOARD OF DIRECTORS RECOMMENDS A VOTE FOR PROPOSAL 4

4. To approve by advisory vote the executive compensation described in the Proxy Statement.

THE BOARD OF DIRECTORS RECOMMENDS A VOTE FOR 1 YEAR UNDER PROPOSAL 5

5. To approve by advisory vote the frequency of future advisory votes to approve executive compensation.

6. To conduct any other business properly brought before the meeting.

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