Torex Semiconductor has announced its first pfm-only step-down dc-dc converter developed specifically for ultra-low-power applications. The new XC9265 series consumes only 0.5µA during operation making it suited for applications that run from batteries for long periods of time. This ultra-low quiescent current is achieved by implementing a synchronous pfm architecture to minimize the switching losses during low loads. The new dc-dc converters will be on display during Electronica in Munich, November 11 – 14, 2014, Hall A6, Booth 280.
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Developed using a proprietary CMOS process the XC9265 integrates a 0.5ohm P-channel driver transistor and a 0.5-Ohm synchronous N-channel switching transistor to ensure high levels of efficiency and superior performance for demanding battery-powered applications. Only an inductor and two ceramic capacitors are needed externally and the XC9265 is able to operate from 6V down to inputs as low as 2V to help further maximize battery life in portable applications.
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An optional UVLO function can also be used to reduce the leakage of potassium hydroxide from small batteries by stopping operation while battery voltage is declining. The standard release voltage of UVLO is 1.75V (±3.0%) and selectable voltages range from 1.6V to 2.7V in 0.1V steps. The XC9265 will be available in the USP-6EL package for applications that require a small form factor or in the industry-standard SOT-25 package.
source: http://www.powerpulse.net/story.php?storyID=30999
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