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25/01/2010
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National Semiconductor has introduced the first three products in the Simple Switcher power module family. The LMZ series is said to provide an integrated solution that will help system designers to get their products to market more quickly.
 The power modules combine the efficiency of a synchronous switching regulator with the simplicity of a linear regulator. This, says NatSemi, eliminates the need for an external inductor and for complex layout placement challenges typical of switching regulator designs.
The power modules are said to simplify power supply design for fpgas, microprocessors, dsps and point of load conversion.
Efficient heat dissipation and a large exposed bottom pad allow for operation in high ambient temperatures without the need for airflow. Typically, the parts are said to operate as much as 10° cooler than comparable modules.
The modules, designed to operate in temperatures ranging from -40 to 125°C, feature low output voltage ripple and a wide voltage and current range. The LMZ10504 supports maximum load currents of 4A with an input voltage range of 2.95 to 5.5V. The LMZ12003 supports maximum load currents of 3A with an input voltage range of 4.5V to 20V. The LMZ14203 supports maximum load currents of 3A with an input voltage range of 6V to 42V.
Meanwhile, the company has unveiled WEBENCH Power Architect – described as the first design tool that allows engineers to create, model and implement multiple output, high performance dc/dc power supplies for an entire system. The tool allows system designers to optimise multiple power supplies across several performance parameters, including topology, intermediate voltage rails, footprint, efficiency, component count and bill of materials cost.
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Author
Graham Pitcher
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