Micrel Launches Industry's Smallest Fully-Integrated 6A Synchronous Buck Regulators For 3V and 5V Supply Rails

SAN JOSE, California, September 27 /PRNewswire/ --

Micrel Inc., (Nasdaq: MCRL), an industry leader in analog, high bandwidth
communications and Ethernet IC solutions, today introduced a family of the
industry's smallest fully-integrated 6A synchronous buck regulators, the
MIC2260x series for 3V and 5V supply rails. Operating at 1MHz (MIC22600) or
at 4 MHz (MIC22601), the ICs feature built-in sequencing, tracking and ramp
control -- enabling all power-up sequencing and tracking protocols.
Targeted at the communications, computing peripherals, and high-end consumer
markets, the solutions are ideal for servers/routers, HD DVD recorders,
wireless base stations, FPGAs, DSPs, and low voltage ASICs, as well as other
high power density applications. The MIC22600 is currently available in
volume quantities with the MIC22601 version available starting in October,
2007. Pricing starts at US$2.68 for 10K quantities.

"Ease-of-use, small size, high efficiency and high integration are key
drivers for today's demanding power designs," noted Ralf Muenster, Micrel's
marketing director for power products. "The MIC2260x are 6A, high efficiency,
current mode buck regulators featuring fully integrated MOSFETs while setting
new standards in terms of footprint and functionality."

The MIC2260x feature fully integrated 30mOhm P-FET and 25mOhm N-FET
switches that deliver a 6A output current with an input voltage range of
2.6-5.5V. The devices have an adjustable output voltage option down to
0.7V and provide efficiencies of up to 93 percent. A proprietary,
patent-pending internal compensation scheme makes the devices extremely easy
to use. The MIC2260x require very few external components and operate at high
fixed switching frequencies, which in turn, reduce the size of passive
components. The built-in sequencing/tracking feature enables reliable power
up/down in multi-rail ASIC/FPGA applications. The devices also feature an
ultra-fast transient response, thermal shutdown and current limit protection,
and a junction operating range from -40-deg C to +125-deg C. The ICs are
available in a 24-pin 4mm x 4mm MLF(R).

About Micrel, Inc.

Micrel Inc., is a leading global manufacturer of IC solutions for the
worldwide analog, Ethernet and high bandwidth markets. The Company's products
include advanced mixed-signal, analog and power semiconductors; high
performance communication, clock management, Ethernet switch and physical
layer transceiver ICs. Company customers include leading manufacturers of
enterprise, consumer, industrial, mobile, telecommunications, automotive, and
computer products. Corporation headquarters and state-of-the-art wafer
fabrication facilities are located in San Jose, CA, with regional sales and
support offices and advanced technology design centers situated throughout
the Americas, Europe and Asia. In addition, the Company maintains an
extensive network of distributors and reps worldwide. Web:
http://www.micrel.com.

Note: MLF is a registered trademark of Amkor Technology.

Web site: http://www.micrel.com