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→Components: 3v3 Buck U9 TPS54202DDCR
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= Components =
== TPS54202DDCR Buck Converter ==
* Voltage In: 4.5-28 (12-28v typical)
* Voltage Out: Variable (5v typical)
* 2 Amp continuous, ~3 Amp current limit
* Over 90% Efficency 12v to 5v buck
* Package: SOT-6, Marking: "4202"
* [https://www.lcsc.com/datasheet/lcsc_datasheet_2410010331_Texas-Instruments-TPS54202DDCR_C191884.pdf Data Sheet]
Voltage In is provided from the first 4 pins of <code>J1</code> and this component is placed at <code>U9</code> with output voltage set point resistors <code>R25/R26</code> with values 100K and 22.1K respectively. Given the equation <code>(100/22.1 + 1) * 0.596 = 3.29</code>, the voltage output provided thru inductor <code>L2</code> in this configuration is set for 3.3 volts and provides the power to the ESP32 and related components.
== M.2 (NGFF) Key E ==