New Power MOSFET Reduces Area by 70% and Package Height by
                                50%

SUNNYVALE, Calif., May 29, 2012 (GLOBE NEWSWIRE) -- Alpha and Omega
Semiconductor Limited (AOS) (Nasdaq:AOSL), a designer, developer and
global supplier of a broad range of power semiconductors, today
introduced the AOC2411, a high performance 30V p-channel Power MOSFET
offered in a compact 1.6mm x 1.6mm chip scale package. The AOC2411
features a low on-resistance of 45mOhms and is ideally suited for
battery powered applications that push the limits of size and
performance such as the latest smart phones, tablet PCs, eBook readers,
UltraBooks, and other mobile Internet devices.

A photo accompanying this release is available at
http://www.globenewswire.com/newsroom/prs/?pkgid=13041

The AOC2411 reduces the amount of utilized board space by 70% while
reducing the package height by 50% when compared to an industry
standard TSOP6 package of similar electrical performance. This form
factor reduction provides designers of power management circuitry with
an ideal and cost-effective solution for minimizing board space in
ultra-portable applications.

"AOS is committed to deliver high performance and value added solutions
to its customers. By offering products like AOC2411 that minimize board
space while improving performance -- which is crucial for new
innovative designs in ultra-portable applications, we are confirming
that commitment," said Peter Wilson, Director of Low Voltage MOSFETs at
AOS.

Device Specification Table


                                                                                                                         
                                                                                                                         
  ---------------------------------------------------------------------------------------------------------------------- 
                                                                                                                         
                                                 RDS(ON)MAX    RDS(ON)MAX                                                
                                                   @ 4.5V        @ 2.5V        Qg (typ)        ID @ TA = 25 degrees C    
     Part Number       VDS (V)       VGS (V)       (mOhms)       (mOhms)         (nC)                    (A)             
  ----------------  ------------  ------------  ------------  ------------  --------------  ---------------------------- 
                                                                                                                         
       AOC2411           -30         +/-12           45            60            12.5                   -3.4             
  ----------------  ------------  ------------  ------------  ------------  --------------  ---------------------------- 



Pricing and Availability

The AOC2411 is immediately available in production quantities with a
lead-time of 12 weeks. The unit price for 1,000 pieces is $0.35.

About AOS

Alpha and Omega Semiconductor Limited, or AOS is a designer, developer
and global supplier of a broad range of power semiconductors, including
a wide portfolio of Power MOSFET and Power IC products. AOS seeks to
differentiate itself by integrating its expertise in device physics,
process technology, design and advanced packaging to optimize product
performance and cost, and its product portfolio is designed to meet the
ever increasing power efficiency requirements in high volume
applications, including portable computers, flat panel TVs, battery
packs, smart phones, portable media players, UPS, motor control and
power supplies. For more information, please visit www.aosmd.com.

Forward Looking Statements

This press release contains forward-looking statements that are based
on current expectations, estimates, forecasts and projections of future
performance based on management's judgment, beliefs, current trends and
anticipated product performance. These forward-looking statements
include, without limitation, references to the efficiency, capability
and application of new products. Forward looking statements involve
risks and uncertainties that may cause actual results to differ
materially from those contained in the forward-looking statements.
These factors include, but are not limited to, the actual product
performance in volume production, the quality and reliability of the
product, our ability to achieve design wins, the general business and
economic conditions, the state of the semiconductor industry, and other
risks as described in the Company's annual report and other filings
with the U.S. Securities and Exchange Commission. Although the Company
believes that the expectations reflected in the forward looking
statements are reasonable, it cannot guarantee future results, level of
activity, performance, or achievements. You should not place undue
reliance on these forward-looking statements. All information provided
in this press release is as of today's date, unless otherwise stated,
and AOS undertakes no duty to update such information, except as
required under applicable law.


CONTACT: Martha Aparicio
         408-789-3233
         martha.aparicio@aosmd.com