October 9, 2008

Microsemi Expands Power Management Portfolio With Advanced Controller for Multi-Voltage Systems; New Dual PWM Controller Simplifies Design, Improves Power Conversion Efficiency

IRVINE, Calif., Oct. 9, 2008 (GLOBE NEWSWIRE) -- Microsemi Corporation (Nasdaq:MSCC), a leading manufacturer of high performance analog/mixed signal integrated circuits and high reliability semiconductors, today announced production of its LX1752(tm) dual PWM controller optimized for systems requiring multiple low voltage, high current power supplies in set-top box, broadband modem, digital television, and data center equipment applications.

These systems deploy sophisticated digital integrated circuits and processors which draw large currents at low voltages and require power supply circuitry with superior transient response. Microsemi's LX1752 controller provides this transient performance while offering advanced features for simplified system design. In addition, the controller's synchronous rectification provides higher power conversion efficiency necessary in addressing today's green initiatives.


     *  Single supply voltage operation 4.5V to 22V    *  Independent programmable power sequencing control    *  Programmable PWM frequency range 180kHz to 1.6MHz    *  PWM outputs operation out of phase 

The LX1752 controller's single supply voltage simplifies system power circuitry while saving bill of materials costs by combining the IC's operating supply with the supply for power conversion. Independent programmable power sequencing control simplifies the device power sequencing often required in systems using sophisticated digital integrated circuits or processors. PWM frequency and soft start times are also programmable. The controller drives N-channel MOSFETs with output currents up to 13 Amps.

When using the LX1752 controller's dual outputs, or when cascading multiple devices, PWM outputs are operated out of phase to reduce system noise, input cap capacitance and cost. For single device operation, the outputs are 180 degrees out of phase, whereas in dual implementation the outputs are 90 degrees out of phase.

"Our new LX1752 dual controller solves power management problems that system designers face using complex analog and digital ICs," said Richard Johnson, DC/DC Product Line manager at Microsemi's Analog Mixed Signal Group. "By working closely with our customers, and taking a system perspective, we can offer superior performance while reducing their bill of materials costs. The LX1752 also joins our successful LX1675(tm) triple PWM controller in Microsemi's power management portfolio."

Pricing and Availability

The LX1752 controller is in production in an RoHS compliant 28-pin, 4x5x1mm QFN package. Pricing in 10,000 unit quantities is $0.86. Datasheets, application notes and evaluation kit information is available at Microsemi's website: http://www.microsemi.com.




About Microsemi

Microsemi Corporation, with corporate headquarters in Irvine, California, is a leading designer, manufacturer and marketer of high performance analog and mixed-signal integrated circuits and high reliability semiconductors. The company's semiconductors manage and control or regulate power, protect against transient voltage spikes and transmit, receive and amplify signals.

Microsemi's products include individual components as well as integrated circuit solutions that enhance customer designs by improving performance and reliability, battery optimization, reducing size or protecting circuits. The principal markets the company serves include implanted medical, defense/aerospace and satellite, notebook computers, monitors and LCD TVs, automotive and mobile connectivity applications. More information may be obtained by contacting the company directly or by visiting its website at http://www.microsemi.com.

The Microsemi Corporation logo is available at http://www.globenewswire.com/newsroom/prs/?pkgid=1233


"Safe Harbor" Statement under the Private Securities Litigation Reform Act of 1995: Any statements set forth in this news release that are not entirely historical and factual in nature, including without limitation statements concerning our expectations regarding new or existing products or technologies, are forward-looking statements. These forward-looking statements are based on our current expectations and are inherently subject to risks and uncertainties that could cause actual results to differ materially from those expressed in the forward-looking statements. The potential risks and uncertainties include, but are not limited to, such factors as rapidly changing technology and product obsolescence, potential cost increases, variations in customer order preferences, weakness or competitive pricing environment of the marketplace, uncertain demand for and acceptance of the company's products, adverse circumstances in any of our end markets, results of in-process or planned development or marketing and promotional campaigns, difficulties foreseeing future demand, potential non-realization of expected orders or non-realization of backlog, product returns, product liability, and other potential unexpected business and economic conditions or adverse changes in current or expected industry conditions, difficulties and costs of protecting patents and other proprietary rights, inventory obsolescence and difficulties regarding customer qualification of products. In addition to these factors and any other factors mentioned elsewhere in this news release, the reader should refer as well to the factors, uncertainties or risks identified in the company's most recent Form 10-K and all subsequent Form 10-Q reports filed by Microsemi with the SEC. Additional risk factors may be identified from time to time in Microsemi's future filings. The forward-looking statements included in this release speak only as of the date hereof, and Microsemi does not undertake any obligation to update these forward-looking statements to reflect subsequent events or circumstances.

This news release was distributed by GlobeNewswire, www.globenewswire.com

 CONTACT:  Microsemi Corporation           Financial Contact:           John Hohener, Vice President and CFO             (949) 221-7100           Editorial Contact:           Cliff Silver, Corporate Communications Manager             (949) 221-7100