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Micrel to Preview Its First Multi-Mode DC/DC Controller Capable of Delivering up to 50A Output Current

SAN JOSE, CA -- (Marketwired) -- 03/12/14 -- Micrel, Inc. (NASDAQ: MCRL), an industry leader in high performance analog and high-speed mixed signal, LAN, and timing and communications solutions, today announced that it would be previewing the MIC2111 DC/DC multi-mode controller at the Applied Power Electronics Conference and Exposition, APEC 2014. The industry conference will be held March 16-20th, at the Fort Worth Convention Center. The device to be showcased is capable of operating in a valley current mode or a voltage mode configuration. This controller provides the necessary PWM signal to interface with industry standard DrMOS. It also interfaces with fully discrete power stages to deliver a high current, low voltage solution to high performance power demanding core rails in the server, communication, and networking markets. Samples can be ordered by contacting the factory: www.micrel.com. The MIC2111 will be available in production and volume quantities starting in the second quarter of 2014 with 1,000 quantities pricing starting at $0.95.

"The MIC2111 is Micrel's first multi-mode controller capable of operating in either a valley current or voltage mode configuration. This device offers design flexibility to optimize for a specific power requirement while minimizing the need to use different controllers, thus eliminating the component qualification process and simplifying inventory management," noted Brian Hedayati, vice president of marketing for high performance linear and power solutions at Micrel. "Moreover, the MIC2111 addresses the design challenge of delivering high power to low voltage core power rails in a constrained space."

In a valley current mode configuration, the MIC2111 allows high frequency operation (up to 2MHz) even under low duty cycle conditions. This resolves a common challenge often present when powering high current, low-voltage core power rails associated with FPGAs, ASICs, and processors from a 12V bus supply. The higher frequency enables a wider operating bandwidth, thereby improving the load transient response while reducing the amount of output capacitance and the size of the inductor. As a benefit, board space and cost are minimized. The same device can also be configured in a voltage mode operation, providing for even better immunity in noise sensitive applications.

To improve performance, the MIC2111 uses a differential DCR current sense for an accurate current limit as well as remote sensing that improves output voltage accuracy; a critical requirement for low voltage core rails in high current applications.

This device offers a host of additional features to provide unique flexibility and protection. The MIC2111 offers overcurrent, over and under voltage protection and is designed to safely start up into a pre-biased output. For additional robustness, this solution includes Micrel's proprietary bi-directional single wire fault pin to ensure that the controller and power stage are operating properly. The switching frequency, output voltage, thermal limit, and soft-start time can all be adjusted externally to meet design requirements. Other factory trimmed optional features include a power on delay and soft-stop operation. The MIC2111 in available in a small 3mm x 3mm TQFN package and operates from -40 degrees C to +125 degrees C.

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, MEMs-based clock oscillators and crystal-less clock generators, 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.

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