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AAT1217 Eval: 1.2MHz, 600mA micropower synchronous step-up converter

Posted: 08 May 2008 ?? ?Print Version ?Bookmark and Share

Keywords:AAT1239-1 application note? micropower sunchronous? step-up converter?

AnalogicTech's AAT1217 is a 1.2MHz constant-frequency, current-mode PWM step-up converter. It can supply a 3.3V output voltage at 100mA from a single AA cell. The device integrates a main switch and a synchronous rectifier for high efficiency without an external Schottky diode. A switching frequency of 1.2MHz allows the use of small, low profile inductors and ceramic capacitors. This demo board is designed for evaluating the AAT1217. The device can supply 400mA to a 3.3V load from a two AA cell input. Every demo board circuit is fully tested and supported with test data before shipping. Two versions of the evaluation board are introduced in this manual. The Rev. 1A is a more �complete? board with jumpers to select output voltage, bypass load disconnect circuitry, shutdown pin status, and the possibility to use a current probe to capture the inductor current waveform. The Rev. 2B evaluation board demonstrates a simplified circuit with only the essential external parts in the smallest possible solution size. This simplified board helps the user to evaluate the AAT1217�s performance for minimal footprint applications.

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