X0306 4 2018-12-03 0000088941 SEMTECH CORP SMTC 0001667921 Li Ye Jane 200 FLYNN ROAD CAMARILLO CA 93012-8790 true false false false Board of Directors Common Stock 2018-12-03 4 S false 3000 52.487 D 2328 D /s/Ye Jane Li by Charles B. Ammann under Power of Attorney dated February 23, 2016 (Copy On File) 2018-12-03