- Initial Statement of Beneficial Ownership (3)

FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^*

MORGENTHALER PARTNERS VI

2. Date of Event Requiring Statement (MM/DD/YYYY) 8/7/2012

3. Issuer Name and Ticker or Trading Symbol

PEREGRINE SEMICONDUCTOR CORP [PSMI]

(Last) (First) (Middle)

2710 SAND HILL ROAD, SUITE 100

4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director ___ X ___ 10% Owner
_____ Officer (give title below) _____ Other (specify below)

(Street)

MENLO PARK, CA 94025

(City) (State) (Zip)

5. If Amendment, Date Original Filed (MM/DD/YYYY)

6. Individual or Joint/Group Filing (Check Applicable Line)

___ Form filed by One Reporting Person
_ X _ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	178349	D ⁽²⁾

*Table II - Derivative Securities Beneficially Owned ( e.g.* , puts, calls, warrants, options, convertible securities)**
1. Title of Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivate Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)
Series A1 Preferred Stock	⁽¹⁾	⁽¹⁾	Common Stock	1512031	⁽¹⁾	D ⁽²⁾
Series B1 Preferred Stock	⁽¹⁾	⁽¹⁾	Common Stock	413529	⁽¹⁾	D ⁽²⁾
Series C1 Preferred Stock	⁽¹⁾	⁽¹⁾	Common Stock	1263802	⁽¹⁾	D ⁽²⁾
Series D1 Preferred Stock	⁽¹⁾	⁽¹⁾	Common Stock	183302	⁽¹⁾	D ⁽²⁾

Explanation of Responses:
( 1)	Each share of the Series A1 Preferred Stock, Series B1 Preferred Stock, Series C1 Preferred Stock, and Series D1 Preferred Stock will automatically convert into one share of common stock upon the closing the Issuer's initial public offering, and has no expiration date.
( 2)	Morgenthaler Management Partners VI, L.L.C., as the general partner of Morgenthaler Partners VI, L.P., beneficially owns the reported securities indirectly, but disclaims beneficial ownership of the reported securities except to the extent of its pecuniary interest therein.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
MORGENTHALER PARTNERS VI 2710 SAND HILL ROAD SUITE 100 MENLO PARK, CA 94025		X
Morgenthaler Management Partners VI LLC 50 PUBLIC SQUARE SUITE 2700 CLEVELAND, OH 44113		X

Signatures
/s/ Jay Biskupski as Attorney-in-fact for Morgenthaler Management Partners VI, L.L.C.		8/7/2012
^** Signature of Reporting Person		Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note:	File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.