In summary, the LTC3350 is a highly integrated charger, backup power controller, and system health monitor for up to four supercapacitors. It features a bi-directional switching controller for step-down charging and boost backup modes and wide voltage range. The LTC3350 provides high charge and backup current capability, input and output ideal diodes, supercapacitor protection shunts and balancers, a power-fail comparator, plus a 14-bit ADC and I²C/SMBus programmability with status reporting. All of this functionality is housed in a compact 5mm x 7mm 38-lead QFN package.