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→LMR51440SDRRR Buck Converter (5v): +Datasheet
* Max Current: 4 Amp
* Package: 12 Pin WSON 0.8mm Height
* [https://www.lcsc.com/datasheet/lcsc_datasheet_2309221225_Texas-Instruments-LMR51450FNDRRR_C5782413.pdf Datasheet]
The component is placed at <code>U7</code> and there is a bodge jumping the voltage set point pin via <code>R19/R20</code> with a 1K resistor to correct for an in initial routing error of <code>R21/R18</code> ~18K and 100K respectively. This all results in a designed output voltage of 5 volts thru inductor <code>L1</code> and accessible at [TP](3) along with the voltage feedback at (TP10).