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Efficient regulator delivers light load for green apps

Posted: 19 Jan 2009 ?? ?Print Version ?Bookmark and Share

Keywords:step down regulator? efficiency light load? green application?

Micrel Inc. has launched the MIC23150, the highest output current device in its HyperLight Load family of synchronous step-down regulators. As with many other members of the HyperLight Load family of step-down regulators, the MIC23150 achieves up to 93 percent peak efficiency and 87 percent efficiency under a 1mA load.

The patented architecture implemented in the MIC23150 delivers high efficiency light load for portable products and green home/office appliances. The MIC23150 features internal MOSFETs able to deliver up to 1.5A output current while consuming just 23?A of quiescent current inside a tiny 2mm x 2mm thin MLF package.

"The MIC23150 surpasses the competition by offering the industry's best-in-class combination of efficiency, size and transient response," noted Andy Khayat, Micrel's director of marketing for portable products. "While portable system designers continue their quest to extend battery life, many home and office product designers must now be concerned with light load efficiency in order to meet the International Energy Agency's (IEA) '1-Watt Plan.' Micrel's patented HyperLight Load architecture provides very high efficiency, coupled with low power consumption, to address the rigorous needs of the industry's latest green home/office appliances and handheld products."

The MIC23150 operates at 4MHz and requires just three external components for a complete solution just 1mm in height. Featuring an operating input supply range from 2.7V to 5.5V, both regulators are suitable for applications powered by single cell Li-ion battery, 3.3- or 5Vdc power source. Output accuracy is an 2.5 percent over the operating junction temperature range of -40C to +125C. Internal protection features include under voltage lockout, current limit and thermal shutdown.

The MIC23150 is available in fixed output options of 1.0V, 1.2V, 1.8V, and 3.3V with pricing starting at $1.00 for 1K quantities. Samples can now be ordered on line on Micrel's web site at

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