The LTC3899 is a triple output (buck, buck, boost) low quiescent current, synchronous DC/DC controller that maintains output voltage regulation over a 2.2V to 60V input range. A 12V car battery can droop to less than 4V during engine restart or cold crank, causing reset of infotainment systems and other electronics that operate from 5V and higher. The boost converter feeds two step-down converters, avoiding output voltage dropout when a car battery droops, a useful feature in automotive start/stop systems that shut off the engine at idle to save fuel. The 60V maximum input voltage covers double battery truck and heavy equipment applications. Alternatively, this controller can be used as a general purpose triple output controller.