POWER OF ATTORNEY

KNOW ALL BY THESE PRESENTS, that the undersigned hereby constitutes and appoints
Daniel A. Artusi and Russell J. Brennan and Bruce A. Maurer and Mark D. Mauldin,
and each of them acting or signing alone, as his or her true and lawful
attorney-in-fact to:

	(1)	execute for and on behalf of the undersigned, in the
undersigned's capacity as an officer and/or director of Silicon
Laboratories Inc. (the "Company"), any and all reports required
to be filed by the undersigned in accordance with Section 16(a)
of the Securities Exchange Act of 1934 and the rules thereunder;

	(2)	do and perform any and all acts for and on behalf
of the undersigned which may be necessary or desirable to complete
and execute any such Form 3, 4 or 5 or other required report and
timely file such report with the United States Securities and
Exchange Commission and any stock exchange or similar authority; and

	(3)	take any other action of any type whatsoever in
connection with the foregoing which, in the opinion of such
attorney-in-fact, may be of benefit to, in the best interest of,
or legally required by, the undersigned, it being understood that
the documents executed by such attorney-in-fact on behalf of the
undersigned, pursuant to this Power of Attorney, shall be in such
form and shall contain such terms and conditions as such
attorney-in-fact may approve in his discretion.

The undersigned hereby grants to each such attorney-in-fact full power
and authority to do and perform each and every act and thing whatsoever
requisite, necessary, and proper to be done in the exercise of any
of the rights and powers herein granted, as fully to all intents and
purposes as the undersigned might or could do if personally present,
with full power of substitution or revocation, hereby ratifying and
confirming all that such attorney-in-fact, or his or her substitute
or substitutes, shall lawfully do or cause to be done by virtue of
this Power of Attorney and the rights and powers herein granted.
The undersigned acknowledges that no such attorney-in-fact, in serving
in such capacity at the request of the undersigned, is hereby assuming,
nor is the Company hereby assuming, any of the undersigned's
responsibilities to comply with Section 16 of the Securities
Exchange Act of 1934.

This Power of Attorney shall remain in full force and effect until
the undersigned is no longer required to file reports under Section
16 with respect to the undersigned's holdings of and transactions
in securities issued by the Company, unless earlier revoked by the
undersigned in a signed writing delivered to the foregoing
attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney
to be executed as of this 2nd day of March, 2005.


			/s/ Navdeep Sooch

/s/