The TPS610994YFFT is a synchronous boost converter from Texas Instruments that delivers a fixed 3.3 V output from an input as low as 0.7 V and up to 5.5 V. Typical applications include battery-powered equipment (single-cell Li-ion, alkaline, or NiMH), portable medical devices, wireless sensors, and any 3.3 V rail derived from a sub-1 V source. The 6-DSBGA package keeps the footprint small — about 1.5 mm × 1.5 mm — which suits space-constrained PCBs.
Input range and output capability
The minimum input voltage of 0.7 V lets this part run from a single alkaline cell that has dropped to nearly 0.9 V under load, or from a Li-ion cell that is already below its 3.0 V cutoff. The 5.5 V maximum input covers two-cell alkaline or single-cell Li-ion with headroom. With an 800 mA switch rating, the actual output current at 3.3 V depends on the input voltage and the inductor selection. From a 3.0 V input, expect roughly 500–600 mA output before the switch current limit engages; from a 1.5 V input, the available output current drops to about 250–300 mA. The synchronous rectifier helps maintain efficiency across this range.