The undersigned, Julie Anne McGee, hereby constitutes and appoints Emeka
Chukwu and Charles B. Ammann and each of them, jointly and severally, his
or her lawful attorney-in-fact and agent, with full power of substitution
and re-substitution, for his or her and in his or her name, place and
stead, in any and all capacities, to execute and file with the Securities
and Exchange Commission and any stock exchange or similar authority (or any
other governmental or regulatory authority) Forms ID, 3, 4 and 5 under
Section 16(a) of Securities Exchange Act of 1934, as amended (the "Act")
and the rules thereunder, or any other appropriate form, and all amendments
thereto with all exhibits and any and all documents required to be filled
with respect thereto, relating to his or her holdings or beneficial
ownership of securities issued by Semtech Corporation, a corporation
organized under the laws of the State of Delaware (the "Corporation"),
granting unto said attorneys-in-fact and agents, and each of them, full
power and authority to do and perform each and every act and thing
requisite or necessary to be done as fully to all intents and purposes as
he or she might or could do in person, hereby ratifying and confirming all
that said attorneys-in-fact and agents, and each of them, or his or her
substitute or substitutes, may do or lawfully cause to be done by virtue
hereof.
The undersigned acknowledges that the foregoing attorneys-in-fact and
agents, solely by virtue of serving in such capacity at the request of the
undersigned, are not assuring, nor is the Corporation assuming, any of the
undersigned's responsibilities to comply with Section 16 of the Act.
This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms ID, 3, 4 and 5 with respect
to the undersigned's holdings or beneficial ownership of and transactions
in securities issued by the Corporation, unless earlier revoked by the
undersigned in a writing delivered to the foregoing attorneys-in-fact.