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What's the best DC/DC topology for your Li-ion powered portable?

Posted: 21 Sep 2007     Print Version  Bookmark and Share

Keywords:DC/DC topology  Lithium ion batteries 

The lithium-ion (Li-ion) battery's high energy-density provides higher battery capacity and longer run times than NiMH or NiCd types, but its 3- to 4.2-volt operating voltage creates a power architecture problem with the typical 3.3-volt system bus used in most of today's portable devices. There are several solutions for generating 3.3 volts (and the often required 1.8-volt output) from a single-cell, lithium-ion source. Here are your options, and what you can expect for extended battery run times.

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