Boost converter in a SOT-563 — what the 3 A rating means for your rail
The Texas Instruments TPS61023DRLT is a synchronous step-up (boost) regulator delivering up to 3 A from a single-cell input as low as 0.5 V. That 0.5 V minimum input voltage means it keeps running when a lithium-ion or alkaline cell is nearly depleted — a common requirement in portable instruments, wireless sensors, and battery-backed IoT nodes where the designer wants every last milliwatt-hour out of the cell before cutoff.
Synchronous rectification and the efficiency curve
Output voltage range and adjustable setpoint
The 5.5 V output ceiling matches the 5.5 V maximum input rating.