Synchronous boost converter with pass-through mode is optimised for single-cell portable applications

The Texas Instruments TPS6128xD device provides a power supply solution for products powered by either by a Li-Ion, Nickel-Rich, Silicon Anode, Li-Ion or LiFePO4 battery. The voltage range is optimised for single-cell portable applications such as smart-phones or tablet PCs. Used as a high-power pre-regulator, the device increases the battery run-time and overcomes input current and voltage limitations of the powered system. While in shutdown, the TPS6128xD operates in a true pass-through mode with only 3-µA quiescent consumption for longest battery shelf life. When the battery is at a good state-of-charge, a low-ohmic, high-efficient integrated pass-through path connects the battery to the powered system during operation. If the battery gets to a weaker state of charge and its voltage goes below the desired minimum system voltage, the device seamlessly transits into boost mode to use the full battery capacity.