Sec Form 13G Filing - BAVP L.P. filing for MONOLITHIC POWER SYSTEMS INC (MPWR) - 2007-02-13

Insider filing report for Changes in Beneficial Ownership

  • Schedule 13G & 13D forms are used to report a party's ownership of stock which exceeds 5% of a company's total stock issue.
  • Schedule 13G is a shorter version of Schedule 13D with fewer reporting requirements.
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                 SECURITIES AND EXCHANGE COMMISSION
                       Washington, D.C. 20549

                        ____________________

                            SCHEDULE 13G
                           (Rule 13d-102)

       INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
     TO RULES 13d-1(b)(c), AND (d) AND AMENDMENTS THERETO FILED
                      PURSUANT TO RULE 13d-2(b)
                         (Amendment No. 2)*

                   MONOLITHIC POWER SYSTEMS, INC.
     ___________________________________________________________
                          (Name of Issuer)


                            COMMON STOCK
     ___________________________________________________________
                   (Title of Class of Securities)


                              609839105
                        ____________________
                           (CUSIP Number)

                          December 31, 2006
     ___________________________________________________________
       (Date of Event Which Requires Filing of this Statement)


Check the  appropriate  box to designate  the Rule  pursuant to which
this Schedule is filed:

                         [ ] Rule 13d - 1(b)
                         [X] Rule 13d - 1(c)
                         [ ] Rule 13d - 1(d)

*    The  remainder  of this  cover  page  shall be filled  out for a
reporting  person's  initial  filing on this form with respect to the
subject  class  of  securities,  and  for  any  subsequent  amendment
containing  information which would alter  disclosures  provided in a
prior cover page.

     The  information  required on the  remainder  of this page shall
not be deemed to be  "filed"  for the  purpose  of  Section 18 of the
Securities  Exchange Act of 1934 ("Act") or otherwise  subject to the
liabilities  of that  section  of the Act but shall be subject to all
other provisions of the Act (however, see the Notes.)

                   (Continued on following page(s)












- -----------------                          --------------
CUSIP        No.            13G             Page 2 of 6
609839105                                      Pages
- -----------------                          --------------



- ---------------------------------------------------------
  1    NAMES OF REPORTING PERSONS
       I.R.S.   IDENTIFICATION   NO.  OF  ABOVE  PERSONS
       (ENTITIES ONLY):

       BAVP, LP                            94-3359700

- ---------------------------------------------------------
- ---------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
       (a) [ ]
                                           (b) [ ]
- ---------------------------------------------------------
- ---------------------------------------------------------
  3    SEC USE ONLY


- ---------------------------------------------------------
- ---------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

                                                Delaware
- ---------------------------------------------------------
- ---------------------------------------------------------
                                               2,135,356
               5  SOLE VOTING POWER
  NUMBER OF
    SHARES
 BENEFICIALLY
OWNED BY EACH
  REPORTING
 PERSON WITH

- ---------------------------------------------------------
- ---------------------------------------------------------
                                                       0
               6  SHARED VOTING POWER
- ---------------------------------------------------------
- ---------------------------------------------------------

               7  SOLE DISPOSITIVE             2,135,356
               POWER
- ---------------------------------------------------------
- ---------------------------------------------------------
               8  SHARED DISPOSITIVE                   0
               POWER
- ---------------------------------------------------------
- ---------------------------------------------------------
    9     AGGREGATE  AMOUNT  BENEFICIALLY  OWNED BY EACH
          REPORTING PERSON
                                               2,135,356
- ---------------------------------------------------------
- ---------------------------------------------------------
   10     CHECK  IF THE  AGGREGATE  AMOUNT  IN  ROW  (9)
          EXCLUDES CERTAIN SHARES*

                                                    [  ]
- ---------------------------------------------------------
- ---------------------------------------------------------
   11     PERCENT OF CLASS  REPRESENTED BY AMOUNT IN ROW
          (9)

                                                   7.05%
- ---------------------------------------------------------
- ---------------------------------------------------------
   12     TYPE OF REPORTING PERSON*

                                                      PN
- ---------------------------------------------------------












- -----------------                          --------------
CUSIP        No.            13G             Page 3 of 6
609839105                                      Pages
- -----------------                          --------------


- ---------------------------------------------------------
  1    NAMES OF REPORTING PERSONS
       I.R.S.   IDENTIFICATION   NO.  OF  ABOVE  PERSONS
       (ENTITIES ONLY):

       Scale Venture Management I, LLC
       94-3358904

- ---------------------------------------------------------
- ---------------------------------------------------------
  2    CHECK  THE  APPROPRIATE  BOX  IF  A  MEMBER  OF A
       GROUP*
       (a) [ ]
                                           (b) [ ]
- ---------------------------------------------------------
- ---------------------------------------------------------
  3    SEC USE ONLY


- ---------------------------------------------------------
- ---------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

                                              California
- ---------------------------------------------------------
- ---------------------------------------------------------
                                                       0
               5  SOLE VOTING POWER
  NUMBER OF
    SHARES
 BENEFICIALLY
OWNED BY EACH
  REPORTING
 PERSON WITH

- ---------------------------------------------------------
- ---------------------------------------------------------
                                               2,135,356
               6  SHARED VOTING POWER
- ---------------------------------------------------------
- ---------------------------------------------------------

               7  SOLE DISPOSITIVE                     0
               POWER
- ---------------------------------------------------------
- ---------------------------------------------------------
               8  SHARED DISPOSITIVE           2,135,356
               POWER
- ---------------------------------------------------------
- ---------------------------------------------------------
    9     AGGREGATE  AMOUNT  BENEFICIALLY  OWNED BY EACH
          REPORTING PERSON
                                               2,135,356
- ---------------------------------------------------------
- ---------------------------------------------------------
   10     CHECK  IF THE  AGGREGATE  AMOUNT  IN  ROW  (9)
          EXCLUDES CERTAIN SHARES*

                                                    [  ]
- ---------------------------------------------------------
- ---------------------------------------------------------
   11     PERCENT OF CLASS  REPRESENTED BY AMOUNT IN ROW
          (9)

                                                   7.05%
- ---------------------------------------------------------
- ---------------------------------------------------------
   12     TYPE OF REPORTING PERSON*

                                                      OO
- ---------------------------------------------------------











Item 1(a).    Name of Issuer:

         Monolithic Power Systems, Inc.

Item 1(b).    Address of Issuer's Principal Executive Offices:

         983 University Avenue, Building A
         Los Gatos, CA 95032 7

Item 2(a).    Name of Person Filing:

         BAVP, LP
         Scale Venture Management I, LLC

Item 2(b).    Address  of  Principal  Business  Office  or,  if None,
Residence:

         Each  Reporting  Person  has its or his  principal  business
         office at 100 North Tryon Street,  Floor 25, Bank of America
         Corporate Center, Charlotte, NC 28255.

Item 2(c).    Citizenship:

         BAVP, LP                   Delaware
         Scale Venture Management I, LLC California

Item 2(d).    Title of Class of Securities:

         Common Stock

Item 2(e).    CUSIP Number:

         609839105

Item 3.  If This  Statement is Filed  Pursuant to Rule  13d-1(b),  or
         13d-2(b) or (c), Check Whether the Person Filing is a:

         (a)  [ ] Broker or dealer  registered  under  Section 15  of
         the Exchange Act.
         (b)  [  ]  Bank  as  defined  in   Section 3(a)(6)   of  the
         Exchange Act.
         (c)  [ ]  Insurance  company as defined in  Section 3(a)(19)
              of the Exchange Act.
         (d)  [ ] Investment  company  registered  under Section 8 of
              the Investment Company Act.
         (e)  [  ]  An   investment   adviser  in   accordance   with
         Rule 13d-1(b)(1)(ii)(E).
         (f)  [ ] An  employee  benefit  plan  or  endowment  fund in
              accordance with Rule 13d-1(b)(1)(ii)(F).
         (g)  [ ] A parent  holding  company  or  control  person  in
              accordance with Rule 13d-1(b)(1)(ii)(G).
         (h)  [ ] A savings  association  as defined in  Section 3(b)
              of the Federal Deposit Insurance Act.
         (i)  [  ]  A  church   plan  that  is   excluded   from  the
              definition  of  an  investment  company  under  Section
              3(c)(14) of the Investment Company Act.
         (j)  [      ]      Group,       in      accordance      with
              Rule 13d-1(b)(1)(ii)(J).

Item 4.  Ownership:

         With respect to the  beneficial  ownership of the  reporting
         person,  see Items 5 through  11 of the cover  pages to this
         Schedule 13G, which are incorporated herein by reference.

Item 5.  Ownership of Five Percent or Less of a Class:

         If this  statement is being filed to report the fact that as
         of the date  hereof  the  reporting  person has ceased to be
         the beneficial  owner of more than five percent of the class
         of securities, check the following  [    ].

Item 6.  Ownership  of More than Five  Percent  on Behalf of  Another
         Person:

         Not applicable.

Item 7.  Identification  and  Classification  of the Subsidiary which
         Acquired  the  Security  Being  Reported  on By  the  Parent
         Holding Company:

         Not applicable.

Item 8.  Identification and Classification of Members of the Group:

         Not applicable.

Item 9.  Notice of Dissolution of Group:

         Not applicable.







Item 10. Certification:

         By signing below each of the undersigned  certifies that, to
         the best of such  undersigned's  knowledge  and belief,  the
         securities  referred to above were not  acquired and are not
         held for the  purpose of or with the effect of  changing  or
         influencing  the control of the issuer of the securities and
         were not acquired and are not held in connection  with or as
         a  participant  in any  transaction  having that  purpose or
         effect.

                                SIGNATURE

After reasonable  inquiry and to the best of my knowledge and belief,
I certify that the  information  set forth in this statement is true,
complete and correct.

Dated:   February 9, 2007

Scale Venture Management I, LLC
BAVP, LP

By:      Scale Venture  Management I, LLC, as reporting person and in
     its capacity as general partner of BAVP LP

By:  /s/ Kate D. Mitchell
     Name:    Kate D. Mitchell
     Title:   Managing Director










                                                         Exhibit 99.1

                  EXHIBIT 99.1 - JOINT FILING AGREEMENT

     The   undersigned   hereby  agree  that  they  are  filing  this
statement  jointly  pursuant  to  Rule  13d-1(k)(1).  Each of them is
responsible  for  the  timely  filing  of such  Schedule  13G and any
amendments  thereto,  and for the  completeness  and  accuracy of the
information  concerning such person  contained  therein;  but none of
them  is  responsible  for  the   completeness  or  accuracy  of  the
information  concerning the other persons  making the filing,  unless
such person knows or has reason to believe that such  information  is
inaccurate.

     In  accordance  with  Rule  13d-1(k)(1)  promulgated  under  the
Securities  and Exchange  Act of 1934,  as amended,  the  undersigned
hereby  agree to the joint  filing  with each other on behalf of each
of them of to such a statement  on Schedule  13G with  respect to the
common stock of Monolithic Power Systems,  Inc. beneficially owned by
each of them.  This Joint  Filing  Agreement  shall be included as an
exhibit to such Schedule 13G.


Dated:   February 9, 2007

Scale Venture Management I, LLC
BAVP, LP

By:      Scale Venture  Management I, LLC, as reporting person and in
     its capacity as general partner of BAVP LP

By:  /s/ Kate D. Mitchell
     Name:    Kate D. Mitchell
     Title:   Managing Director