<SEC-DOCUMENT>0001437749-20-008817-index.html : 20200429
<SEC-HEADER>0001437749-20-008817.hdr.sgml : 20200429
<ACCEPTANCE-DATETIME>20200429152545
ACCESSION NUMBER:		0001437749-20-008817
CONFORMED SUBMISSION TYPE:	DEF 14A
PUBLIC DOCUMENT COUNT:		11
CONFORMED PERIOD OF REPORT:	20200611
FILED AS OF DATE:		20200429
DATE AS OF CHANGE:		20200429
EFFECTIVENESS DATE:		20200429

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:		DEF 14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-51026
		FILM NUMBER:		20829757

	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>DEF 14A
<SEQUENCE>1
<FILENAME>mpwr20200427_def14a.htm
<DESCRIPTION>FORM DEF 14A
<TEXT>
Document 1 - file: mpwr20200427_def14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>graph01.jpg
<TEXT>
Document 2 - file: graph01.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>graph02.jpg
<TEXT>
Document 3 - file: graph02.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>graph03.jpg
<TEXT>
Document 4 - file: graph03.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>logo.jpg
<TEXT>
Document 5 - file: logo.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>mpwr20200427_def14aimg008.jpg
<TEXT>
Document 6 - file: mpwr20200427_def14aimg008.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>mpwrgraph01.jpg
<TEXT>
Document 7 - file: mpwrgraph01.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>pc1.jpg
<TEXT>
Document 8 - file: pc1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>pc2.jpg
<TEXT>
Document 9 - file: pc2.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>sig1.jpg
<TEXT>
Document 10 - file: sig1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>sig2.jpg
<TEXT>
Document 11 - file: sig2.jpg

</DOCUMENT>
</SEC-DOCUMENT>