The application note you have requested is available in Acrobat PDF format: APPLICATION NOTE 414: Battery Charger Regulates Input Voltage (PDF, 125kB) A free Acrobat PDF reader is available from: http://www.adobe.com/products/acrobat/readstep.html Related Parts   APP 414: Jul 09, 1998 MAX639 5V/3.3V/3V Adjustable, High-Efficiency, Low-IQ, Step-Down DC-DC Converters Full Data Sheet (PDF, 780kB) Free Samples Automatic Updates Would you like to be automatically notified when new application notes are published in your areas of interest? Sign up for EE-Mail™. We Want Your Feedback!   Download, PDF Format (125kB)  AN414, AN 414, APP414, Appnote414, Appnote 414