Integrated 36V buck battery charger provides seamless backup power
By Graham Prophet @ eedesignnewseurope.com:
LTC4091 is a complete lithium-ion battery backup management system for 3.45V to 4.45V supply rails that must be kept active during a long duration main power failure. The LTC4091 employs a 36V monolithic buck converter with adaptive output control to provide power to a system load and enable high efficiency battery charging from the buck output.
Integrated 36V buck battery charger provides seamless backup power – [Link]