Abstract: The following application note shows a complete battery backup circuit for pseudo static RAM (PSRAM) in battery powered systems using the MAX630 step-up switching regulator and MAX791 microprocessor supervisory circuit. The application note you have requested is available in Acrobat PDF format: APPLICATION NOTE 64: Provide Battery Backup For Pseudo-Static RAMs (PDF, 62kB) A free Acrobat PDF reader is available from: http://www.adobe.com/products/acrobat/readstep.html Related Parts   APP 64: Jul 09, 1998 MAX630 CMOS Micropower Step-Up Switching Regulator Full Data Sheet (PDF, 264kB) Free Samples MAX791 Microprocessor Supervisory Circuit Full Data Sheet (PDF, 424kB) 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 (62kB)  AN64, AN 64, APP64, Appnote64, Appnote 64