CONFIRMING STATEMENT

	I, John K. Kibarian, (the "Attorney-in-Fact"), by virtue of the authority and
the full power of substitution given to me by Lucio Lanza(the "Section 16
Reporting Person") in and by the Power of Attorney previously executed by the
Section 16 Reporting Person (the "Power of Attorney"), do hereby appoint Joy E.
Leo and Keith A. Jones, or either of them signing singly, as the
Attorney-in-Fact's substitute (each a "Substitute Attorney-in-Fact") to exercise
all of the Attorney-in-Fact's powers provided for in the Power of Attorney,
including full power and authority to do and perform each and every act
requisite, necessary or convenient to be done in connection with such powers, as
fully, to all intents and purposes, as the Attorney-in-Fact might or could do
thereby.

	This Confirming Statement shall remain in full force and effect until the
earlier of (i) the Section 16 Reporting Person is no longer required to file
Forms 4 and 5 with respect to holdings of and transactions in securities issued
by PDF Solutions, Inc. (the "Company") (unless the Power of Attorney executed by
the Section 16 Reporting Person is earlier revoked by them in a signed writing
delivered to the Attorney-in-Fact), (ii) the Attorney-in-Fact terminates the
appointment of the Substitute Attorney-in-Fact or (iii) the
Substitute Attorney-in-Fact ceases to be an employee of the Company.

	IN WITNESS WHEREOF, the undersigned has caused this Confirming Statement to be
executed as of this  15th day of May, 2009.

    /s/ John K. Kibarian
__________________________________
JOHN K. KIBARIAN, Attorney-in-Fact
for Lucio Lanza