Microsemi Expands Power Semiconductors Portfolio

[Apoptosis]

Microsemi Expands Power Semiconductors Portfolio With New IGBTs and Low VF Ultra-Soft Recovery Diodes

IRVINE, Calif., June 3, 2008 (PRIME NEWSWIRE) -- Microsemi Corporation
(Nasdaq:MSCC), a leading manufacturer of high performance analog/mixed
signal integrated circuits and high reliability semiconductors, has
expanded its portfolio of high power semiconductor devices with a new
family of resonant mode combi insulated gate bi-polar transistors
(IGBTs) and a new series of low VF ultra-soft recovery diodes.

The twelve new application specific combi IGBTs are designed for high
power, high performance applications that implement zero voltage
switching (ZVS) and zero current switching (ZCS) topologies that are
used in resonant mode and phase shifted bridge switching. Their
features include devices of 600V and 1200V input voltages, high speed
switching and internal parallel free wheeling diodes to help reduce
system conduction losses.

Typical applications are in welding, induction heating,
telecommunications, and medical equipment with power levels of 5000
watts or less.

The new DL Series of eight Microsemi low VF ultra-soft recovery diodes
are designed for applications that use output rectification and other
resonant mode circuits, such as phase shifted bridge. Their ultra-soft
recovery minimizes or eliminates the use of a snubber and minimizes
EMI, while their low voltage forward reduces conduction loss. The 600V
series includes singles, duals, and common cathode configurations.

"Our group's focus is to provide a wide range of semiconductor
solutions for designers of high voltage, high power and high
performance applications," said Russell Crecraft, General Manager,
Power Products Group in Bend, Oregon. "In that light, we continuously
monitor market opportunities for enhancing our portfolio, as
represented by these new IGBT and diode products," he said.

Both the IGBT Combi family and DL diode series are available for
immediate shipment. Technical information on Microsemi's entire line of
power semiconductors is available on the Microsemi website,
http://www.microsemi.com.

About Microsemi Corporation

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, reliability and battery optimization, reducing size or
protecting circuits. The company's PowerDsine systems provide a
cost-effective way to deliver power over existing Ethernet
infrastructures. Principal markets served include implantable 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
web site at http://www.microsemi.com.