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Power Density Synchronous Buck DC/DC Converter Family Simplifies Point-of-Load Designs

Thu, 09/23/2010 - 7:58am
Micrel, Inc. announced it has rolled out its SuperSwitcher II™ family of integrated MOSFET buck regulators for high power density DC-DC applications. The MIC26xxx SuperSwitcher II family is comprised of three DC-DC buck regulators featuring Micrel's proprietary Hyper Speed Control TM architecture.

The MIC26400, MIC26600 and MIC26950 devices operate with an input supply voltage range from 4.5V to 26V and deliver an output current of 5A, 7A and 12A respectively. The SuperSwitcher II family has been tailored to be Any Capacitor™ stable and independent of output ESR, thus solving the perennial problem of stability that power designers face with distributed output capacitance.

The SuperSwitcher II family of buck regulators are capable of driving DC-DC loads at more than 95 percent efficiency with ±1 percent accuracy, with output adjustable down to 0.8V. Micrel's proprietary Hyper Speed Control™ control architecture allows for ultra fast transient response requiring significantly lower output capacitance. These devices operate at a switching frequency of 300 kHz and deliver very high efficiency across the DC load spectrum.

The SuperSwitcher II family features an enable pin for very low power shutdown, internal soft start, undervoltage lockout, internal compensation and a host of protection features such as prebias safe startup, over temperature protection, foldback current limit and short circuit protection. The MIC26400, MIC26600 and the MIC26950 buck regulators are available in a thermally enhanced lead free 28-Lead 5mm x 6mm MLF® package.

 
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