<SEC-DOCUMENT>0001437749-23-014152-index.html : 20230512
<SEC-HEADER>0001437749-23-014152.hdr.sgml : 20230512
<ACCEPTANCE-DATETIME>20230512140015
ACCESSION NUMBER:		0001437749-23-014152
CONFORMED SUBMISSION TYPE:	SD
PUBLIC DOCUMENT COUNT:		2
<RULE>
<RULE-NAME>13p-1
<ITEM>
<ITEM-NUMBER>1.01
<ITEM-PERIOD>20221231
</ITEM>
<ITEM>
<ITEM-NUMBER>1.02
<ITEM-PERIOD>20221231
</ITEM>
</RULE>
FILED AS OF DATE:		20230512
DATE AS OF CHANGE:		20230512

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:		SD
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-51026
		FILM NUMBER:		23914740

	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>SD
<SEQUENCE>1
<FILENAME>mpwr20230508_sd.htm
<DESCRIPTION>FORM SD
<TEXT>
Document 1 - file: mpwr20230508_sd.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-1.01
<SEQUENCE>2
<FILENAME>ex_516687.htm
<DESCRIPTION>EXHIBIT 1.01
<TEXT>
Document 2 - file: ex_516687.htm

</DOCUMENT>
</SEC-DOCUMENT>