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High Power DC/DC Boost Converter for Space-constrained Applications

Mon, 04/16/2007 - 9:13am

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Advanced Analogic Technologies’ AAT1210 high power, high current step-up converter for thin, small-footprint portable applications supplies up to 4.5W of power. This converter is said to be the first to take a single-cell Lithium-ion battery voltage and boost it to a 5V/900 mA output in a total solution less than 1 mm in height. Operating from an input range of 2.7V to 5.5V, this DC/DC boost converter features an output voltage which can be set from VIN + 0.5V up to 18V. A hysteretic current mode control circuit simplifies system design by eliminating the need for external compensation. A high 2 MHz switching frequency enables the use of extremely small and low-profile external components. To help minimize leakage current common on boost converters, the AAT1210 also features the True Load Disconnect function which isolates the load from the power source when the converter is turned off. This feature helps the device achieve ultra-low sleep mode current consumption without the use of an external MOSFET. In general, the AAT1210 achieves power efficiency levels up to 90% over a wide load range.
Analogic Technologies
408-524-9684, www.analogictech.com

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