Massimiliano Belloni Edoardo Bonizzoni Franco Maloberti On the design of single-inductor multiple-output DC-DC buck converters. 3049-3052 2008 ISCAS http://dx.doi.org/10.1109/ISCAS.2008.4542101 conf/iscas/2008 db/conf/iscas/iscas2008.html#BelloniBM08