Micrel's New 6A/3A Synchronous Buck Regulators Leverage HyperLight(R) Load

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SAN JOSE, CA -- (Marketwire) -- 02/21/13 -- Micrel, Inc. (NASDAQ: MCRL), an industry leader in high-performance Linear and Power solutions, LAN and timing and communications solutions, today introduced the MIC23603/303, a family of 4MHz PWM 6A/3A synchronous buck regulators featuring HyperLight(R) Load technology. The patented architecture implemented in the MIC23603/303 delivers state-of-the-art transient performance with just 5mV of output ripple in full PWM mode. The MIC23603/303 combine a low-loss proprietary power MOSFET with Micrel's patented constant on-time DC-to-DC switching converter scheme to deliver up to 6A/3A of output current while consuming just 24uA of quiescent current. The MIC23603/303 is ideal for set-top boxes, portable instruments, and automotive instrumentation applications for powering FPGAs, ASICs and DSP ICs where ultra-fast transient response and light-load efficiency are critical. The MIC23603 is currently available in volume with pricing starting at $1.08 for 1K quantities. Pricing for the MIC23303 begins at $0.49 for 1K quantities. Samples can be ordered at: http://www.samplecomponents.com/scripts/samplecenter.dll?micrel.

"The MIC23603/303surpasses the competition by offering a best-in-class combination of efficiency, smallest size and transient response, making it suitable for many applications," noted Brian Hedayati, vice president of marketing for High-performance Linear and Power Solutions at Micrel. "System power designers must continuously strive to optimize power efficiency in order to extend battery life while delivering the high performance features customers demand. Micrel's patented HyperLight Load architecture provides very high efficiency for low power modes and fast load transient response to maintain the precise supply rail voltages when power demand increases."

The MIC23603/303features a Power Good (PG) output, programmable soft start and very low quiescent current (24uA) in a small, thermally enhanced 20-pin 4mm x 5mm DFN package for the MIC23603 and a 12-pin 3mm x 3mm DFN package for the MIC23303. The solutions offer an adjustable output voltage range from 0.65V to 3.6V for low voltage applications. In addition, the devices offer a wide input range of 2.9V to 5.5V for Li-ion applications. The device operates at -40C to +125C degrees junction temperature range.

About Micrel, Inc. Micrel, Inc. is a leading global manufacturer of IC solutions for the worldwide high-performance linear and power, LAN and timing and communications markets. The Company's products include advanced mixed-signal, analog and power semiconductors, as well as 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: www.micrel.com.

Note: HyperLight Load is a registered trademark of Micrel, Inc.

Contact: Julieanne DiBene Marketing Communications 1-408-474-1276 Julie.DiBene@Micrel.com