Company:  MONOLITHIC POWER SYSTEMS ... (MPWR)
Form Type:  10-Q
Filing Date:  7/30/2009 
CIK:  0001280452 
Address:  6409 GUADALUPE MINES ROAD 
City, State, Zip:  SAN JOSE, California 95120 
Telephone:  (408) 826-0600 
Fiscal Year:  12/31 
Last Trade
Last Trade: 
$20.20   		Change: 
0.00 (0.00%)  
Trade Time: 
Feb 09   		Market Cap: 
$710.33M
Description of Business
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  FORM 10-Q
    PART I. FINANCIAL INFORMATION
      ITEM 1. FINANCIAL STATEMENTS
        BALANCE SHEET
        BALANCE SHEET
        INCOME STATEMENT
        CASH FLOW
        NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
      ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL ...
      ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT ...
      ITEM 4. CONTROLS AND PROCEDURES
    PART II. OTHER INFORMATION
      ITEM 1. LEGAL PROCEEDINGS
      ITEM 1A. RISK FACTORS
      ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS
      ITEM 5. OTHER INFORMATION
      ITEM 6. EXHIBITS
    SIGNATURE
    EXHIBIT INDEX
  EXHIBIT 31.1
    CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO
  EXHIBIT 31.2
    CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT TO
  EXHIBIT 32.1
    CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND
BROKERAGE PARTNERS
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