POWER INTEGRATIONS INC — Director's Dealing 2012

May 10, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: POWER INTEGRATIONS INC (POWI)
CIK: 0000833640
Period of Report: 2012-05-08

Reporting Person: Sutherland Ben (VP of Sales)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-08	Common Stock	S	290	$42.4686	Disposed	5457	Direct
2012-05-08	Common Stock	A	5000	—	Acquired	10457	Direct
2012-05-08	Common Stock	M	235	$21	Acquired	10692	Direct
2012-05-08	Common Stock	S	235	$42.563	Disposed	10457	Direct
2012-05-08	Common Stock	M	250	$21.14	Acquired	10707	Direct
2012-05-08	Common Stock	S	250	$42.563	Disposed	10457	Direct
2012-05-08	Common Stock	M	1500	$30.78	Acquired	11957	Direct
2012-05-08	Common Stock	S	1500	$42.563	Disposed	10457	Direct
2012-05-08	Common Stock	S	225	$41.4264	Disposed	10232	Direct
2012-05-09	Common Stock	S	325	$42.61	Disposed	9907	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-08	Incentive Stock Option (right to buy)	$30.78	M	1500	Disposed	2021-08-05	Common Stock (1500)	Direct
2012-05-08	Incentive Stock Option (right to buy)	$42.88	A	4626	Acquired	2022-05-08	Common Stock (4626)	Direct
2012-05-08	Non-Qualified Stock Option (right to buy)	$21	M	235	Disposed	2018-11-03	Common Stock (235)	Direct
2012-05-08	Non-Qualified Stock Option (right to buy)	$21.14	M	250	Disposed	2019-04-28	Common Stock (250)	Direct
2012-05-08	Non-Qualified Stock Option (right to buy)	$42.88	A	5374	Acquired	2022-05-08	Common Stock (5374)	Direct