Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 25, 2011	Sep. 26, 2010
Segment Information [Abstract]
Number of reportable segments	6
Schedule of Segment Reporting Information [Line Items]
Revenues	$ 302,741	$ 280,867
Percentage of total (in hundredths)	100.00%	100.00%
Gross margin (in hundredths)	37.90%	38.70%
Customer Segments [Member]
Schedule of Segment Reporting Information [Line Items]
Revenues	300,973	278,886
Percentage of total (in hundredths)	99.40%	99.30%
Gross margin (in hundredths)	37.60%	38.30%
Power Management Devices [Member]
Schedule of Segment Reporting Information [Line Items]
Revenues	111,207	115,524
Percentage of total (in hundredths)	36.70%	41.10%
Gross margin (in hundredths)	29.40%	29.50%
Energy Saving Products [Member]
Schedule of Segment Reporting Information [Line Items]
Revenues	76,058	60,016
Percentage of total (in hundredths)	25.10%	21.40%
Gross margin (in hundredths)	41.40%	42.50%
Automotive Products [Member]
Schedule of Segment Reporting Information [Line Items]
Revenues	28,900	23,920
Percentage of total (in hundredths)	9.60%	8.50%
Gross margin (in hundredths)	31.50%	32.00%
Enterprise Power [Member]
Schedule of Segment Reporting Information [Line Items]
Revenues	35,966	35,229
Percentage of total (in hundredths)	11.90%	12.60%
Gross margin (in hundredths)	40.30%	47.30%
HiRel [Member]
Schedule of Segment Reporting Information [Line Items]
Revenues	48,842	44,197
Percentage of total (in hundredths)	16.10%	15.70%
Gross margin (in hundredths)	51.80%	52.10%
Intellectual Property [Member]
Schedule of Segment Reporting Information [Line Items]
Revenues	$ 1,768	$ 1,981
Percentage of total (in hundredths)	0.60%	0.70%
Gross margin (in hundredths)	100.00%	100.00%