The TPS61086DRCT is a step-up (boost) converter from Texas Instruments, delivering an adjustable output from 2.8 V up to 18.5 V from a 2.3 V to 6 V input rail. The internal switch is rated for 2 A continuous — that is the peak current the inductor sees, not the output current; at a 3.3 V input boosting to 12 V, expect around 600-700 mA output before the switch current limit kicks in, depending on inductor ripple and efficiency. Because the part is non-synchronous, you need an external Schottky rectifier on the output; the efficiency peak lands around 85-90 % depending on the duty cycle, with the diode conduction loss dominating at higher output currents.
Package, temperature grade, and board integration
The input range bottoms out at 2.3 V and tops at 6 V — this is a single-cell Li-ion to 3- or 4-cell alkaline / NiMH application space. The 18.5 V output ceiling suits powering OLED bias rails, USB-C Power Delivery 5 V/9 V fixed outputs, or a local 12 V rail from a 5 V bus. The adjustable output is set with a resistor divider from the FB pin to GND.