Segment Information - Net Sales Activity by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 30, 2022	Jan. 31, 2021	Jan. 26, 2020
Revenue from External Customer [Line Items]
Net sales	$ 740,858	$ 595,117	$ 547,512
Gross profit	466,081	363,549	336,684
High-Performance Analog Group
Revenue from External Customer [Line Items]
Net sales	537,288	433,174	390,300
Gross profit	364,594	283,668	259,172
System Protection Group
Revenue from External Customer [Line Items]
Net sales	203,570	161,943	157,212
Gross profit	105,605	81,631	78,809
Unallocated costs, including share-based compensation
Revenue from External Customer [Line Items]
Gross profit	$ (4,118)	$ (1,750)	$ (1,297)