<SEC-DOCUMENT>0001437749-23-016552-index.html : 20230605
<SEC-HEADER>0001437749-23-016552.hdr.sgml : 20230605
<ACCEPTANCE-DATETIME>20230605060122
ACCESSION NUMBER:		0001437749-23-016552
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20230605
DATE AS OF CHANGE:		20230605

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MONOLITHIC POWER SYSTEMS INC
		CENTRAL INDEX KEY:			0001280452
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				770466789
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-51026
		FILM NUMBER:		23991123

	BUSINESS ADDRESS:	
		STREET 1:		5808 LAKE WASHINGTON BLVD. NE
		CITY:			KIRKLAND
		STATE:			WA
		ZIP:			98033
		BUSINESS PHONE:		425-296-9956

	MAIL ADDRESS:	
		STREET 1:		5808 LAKE WASHINGTON BLVD. NE
		CITY:			KIRKLAND
		STATE:			WA
		ZIP:			98033
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>mpwr20230602_defa14a.htm
<DESCRIPTION>FORM DEFA14A
<TEXT>
Document 1 - file: mpwr20230602_defa14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>a01.jpg
<TEXT>
Document 2 - file: a01.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>mpwr20230602_defa14aimg002.jpg
<TEXT>
Document 3 - file: mpwr20230602_defa14aimg002.jpg

</DOCUMENT>
</SEC-DOCUMENT>