Volterra Announces Favorable Rulings: Court Determines That Infineon Infringed Volterra...

Volterra Announces Favorable Rulings: Court Determines That Infineon Infringed
Volterra Patents, and Jury Unanimously Upholds Validity of Volterra Patents

FREMONT, Calif., May 25, 2011 (GLOBE NEWSWIRE) -- Volterra Semiconductor
Corporation (Nasdaq:VLTR), a leading provider of high-performance analog and
mixed-signal power management semiconductors, today announced recent favorable
rulings in its patent infringement lawsuit against Infineon Technologies AG and
its subsidiaries Infineon Technologies N.A. and Primarion, Inc. ("Infineon").

On May 23, 2011, the United States District Court granted pre-verdict motions
for judgment as a matter of law in favor of Volterra and dismissed all remaining
claims of invalidity as to Volterra's U.S. Patent No. 6,278,264 (the '264
patent) and several of the asserted claims of Volterra's U.S. Patent No.
6,462,522 (the '522 patent). Defendants' remaining claims of invalidity as to
Volterra's '522 patent were then submitted to the jury.

On May 24, 2011, the jury returned its unanimous verdict determining that all of
the remaining asserted claims of Volterra's '522 patent were valid and not
obvious.

As a result of earlier rulings by the Court and stipulations by the defendants
in the litigation, it has been determined that Infineon's flip chip integrated
power stage products, PX 4640, PX 4642, PX 4650 and PX 4652 infringed all of the
asserted claims of Volterra's '264 and '522 patents.

"We are quite pleased with the court's rulings and the jury's unanimous
verdict," said Jeff Staszak, President and CEO of Volterra Semiconductor. "These
results bolster Volterra's intellectual property and competitive position in the
market."

In the next phase of the litigation, Volterra intends to pursue its claims for
damages based on Infineon's infringement of these Volterra patents. Infineon has
announced that it shall appeal these rulings, and it is anticipated that the
parties shall submit further post trial motions.

Background on the Litigation

In November 2008, Volterra sued Infineon Technologies AG and its subsidiaries
Infineon Technologies N.A. and Primarion, Inc. in the United States District
Court for the Northern District of California for infringement of five Volterra
patents, including the '264 and '522 patents. The U.S. Patent and Trademark
Office recently reexamined all of these Volterra patents and made determinations
reaffirming their validity.

In response to Volterra's original lawsuit, Infineon has filed counterclaims and
a countersuit, which Volterra believes are without merit. Infineon's countersuit
against Volterra has been suspended by the Delaware court pending resolution of
Volterra's lawsuit against Infineon in California.

About Volterra Semiconductor Corporation

Volterra Semiconductor Corporation, headquartered in Fremont, CA, designs,
develops, and markets leading edge silicon solutions for low-voltage power
delivery. The Company's product portfolio is focused on advanced switching
regulators for the computer, datacom, storage, and portable markets. Volterra
operates as a fabless semiconductor company utilizing world-class foundries for
silicon supply. The company is focused on creating products with high
intellectual property content that match specific customer needs. For more
information, please visit http://www.volterra.com.

Forward-Looking Statements:

This press release contains forward-looking statements based on current
expectations of Volterra. The words "expect," "will," "should," "would,"
"anticipate," "project," "outlook," "believe," "intend," and similar phrases as
they relate to future events are intended to identify such forward-looking
statements. You are cautioned not to place undue reliance on these
forward-looking statements, which speak only as of the date of this press
release. All forward-looking statements are qualified in their entirety by this
cautionary statement, and Volterra undertakes no obligation to revise or update
any forward-looking statements to reflect events or circumstances after the date
hereof, except as required by law.

CONTACT: Heidi Flannery, Investor Relations
(510) 743-1718
investor@volterra.com