Competing monolithic devices have many performance limitations. These drawbacks include: poor burst mode Iq, unknown handoff from charging normal mode to boosting backup mode, no lithium iron phosphate support, and Li-ion charge voltages that are too high and not well suited for backup systems. A multi-chip solution may also be implemented including a PowerPath controller, buck switching regulator charger and boost regulator, combined with several discrete Resistors and Capacitors. However, this type of solution is both large and complex, and has much lower performance.