1.07A switch, 0.8V startup — sizing the boost rail
The Texas Instruments TPS61016DGS is a fixed 3.3V output boost converter in a 10-VSSOP package, designed for single-cell battery or low-voltage rail step-up applications. Its 1.07A switch current rating sets the practical output load limit — at 3.3V out from a 1.2V input, you're looking at roughly 300-350mA continuous output before the switch current limit is reached, factoring in efficiency. The 500kHz switching frequency keeps the inductor small, typically a 4.7µH to 10µH shielded type, and the synchronous rectifier helps maintain efficiency above 85% across moderate loads. The input range spans 0.8V minimum to 3.3V maximum, meaning this part will start up and regulate from a deeply discharged single-cell alkaline (0.9V) or a Li-ion cell down to its cutoff. The fixed 3.3V output is internally set — no external divider network needed, which saves two resistors and a feedback node on the board.
Package and storage — Tube delivery, MSL handling
The 10-VSSOP package (3.00mm body width) is MSL 1 or 2 depending on the date code — check the label. If the tube has been open and the parts have been exposed to ambient humidity beyond the floor-life window, a 24-hour bake at 125°C before reflow is the safe call. Store the tubes in a dry cabinet below 10% RH if you're staging them for a multi-year build.