POWER INTEGRATIONS INC — Director's Dealing 2011

Jan 5, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: POWER INTEGRATIONS INC (POWI)
CIK: 0000833640
Period of Report: 2011-01-03

Reporting Person: TOMLIN JOHN (VP of Operations)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-01-03	Common Stock	M	51	$18.95	Acquired	12523	Direct
2011-01-03	Common Stock	S	51	$40.4	Disposed	12472	Direct
2011-01-03	Common Stock	M	3699	$17.18	Acquired	16171	Direct
2011-01-03	Common Stock	S	3699	$40.0656	Disposed	12472	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-01-03	Non-Qualified Stock Option (right to buy)	$17.18	M	3699	Disposed	2015-01-24	Common Stock (3699)	Direct
2011-01-03	Non-Qualified Stock Option (right to buy)	$18.95	M	51	Disposed	2013-01-08	Common Stock (51)	Direct

Footnotes

F1: The range of prices for the enclosed transactions were $39.88 to $40.40.

Upon request by the SEC staff, the issuer, or any security holder of the issuer we will provide full information regarding the number of shares sold at each separate price.

F2: This sale is pursuant to a 10B5-1 Sales Plan