What the input range and fixed output mean for your rail
The TPS63002DRCR: This is the key fit question: if your system runs on a single Li-ion cell (3.0–4.2 V) or two alkaline cells (1.8–3.0 V) and needs a stable 5 V rail for a sensor, display, or USB VBUS, this part handles the transition without a separate boost or buck stage.
Switch current and synchronous rectification — sizing the load
The internal switch is rated for 1.6 A peak current, so the actual output current you can draw at 5 V depends on the input voltage and the conversion efficiency — at a 3.3 V input you typically get around 800 mA continuous output. The synchronous rectifier replaces the external Schottky diode, which keeps the efficiency above 90 % across most of the load range and simplifies the BOM to just the inductor and a few capacitors.
Sourced through authorized distribution channels; availability and current pricing confirmed at RFQ.