SOURCE: Micrel


January 05, 2010 08:05 ET

Micrel's 10A Fully Integrated Synchronous Buck Regulator Redefines "High Power Density"

SuperThermal™ 10A MOSFETs Enables Highest Power Density in the Industry

SAN JOSE, CA--(Marketwire - January 5, 2010) - Micrel Inc. (NASDAQ: MCRL), an industry leader in analog, high bandwidth communications and Ethernet IC solutions, today heralded a pioneering product in the high power density family of buck regulators, the MIC22950. The synchronous step-down regulator features 10A integrated SuperThermal™ MOSFETs and is optimized for highest efficiency. With only 1microH inductor and a 100microF output capacitor, the device achieves more than 95 percent efficiency over a broad load range. It also features built-in sequencing, tracking and ramp control capabilities -- enabling multiple power-up sequencing and tracking protocols. The solution is ideal for high power density point-of-load conversion, base stations, servers and routers, Blu-ray players, computer peripherals, FPGAs, DSPs and low voltage ASIC power applications. The MIC22950 is currently available in volume quantities with pricing starting at $4.31 for 1K quantities. Samples can now be ordered at:

"Super-high power density in a small footprint combined with 95 percent efficiency offer remarkable benefits in advanced applications such as Super 3G/LTE base stations, servers and workstations," noted Andrew Cowell, vice president of analog marketing. "The MIC22950 is extremely easy to use and saves significant BOM cost for the designer by integrating Micrel's unique SuperThermal™ MOSFETs."

The MIC22950 has an ultra-high speed control loop that keeps the output voltage within regulation even under extreme transient load swings that are commonly found in FPGAs and low voltage ASICs. The output voltage can be adjusted down to 0.7V to address all low voltage power needs, from a 3.3V or 5V power bus. A full range of sequencing and tracking options is available. The Enable/Delay pin, combined with the Power Good/POR pin, allows multiple outputs to be sequenced as desired during turn-on and turn-off. The RC (Ramp Control™) pin allows the device to be connected to another product in Micrel's MIC22xxx and/or its MIC68xxx family, thereby allowing the designer to maintain the output voltages within a certain delta-V on start up. The MIC22950 has thermal shutdown and current limit protection, is available in a 32-pin 5mm x 5mm MLF®, and offers a junction operating range from -40degC to +125degC.

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:

Note: MLF is a registered trademark of Amkor Technology. Ramp Control and SuperThermal are trademarks of Micrel Inc.

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