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Woah an on-chip switch mode power supply? How does that work? I've put together these before on a PCB and they require an inductor and a bunch of other supporti
by polishdude20 2y ago
Woah an on-chip switch mode power supply? How does that work? I've put together these before on a PCB and they require an inductor and a bunch of other supporting passive elements. How does all that fit onto a chip?
- welterde 2y agoIf I read the datasheet correctly you still need an inductor and some passive components externally. The only thing that is not needed is an external switch mode power supply chip.
- OnACoffeeBreak 2y agoThey probably mean "on-board" instead of "on-chip". Data sheet [0] section "5.4 Powerchain" shows an external RT6150 buck-boost switcher with an external inductor. 0: https://datasheets.raspberrypi.com/pico/pico-2-datasheet.pdf https://datasheets.raspberrypi.com/pico/pico-2-datasheet.pdf Edit: reading further in that section of the data sheet, "The RP2350 has an on-chip switching regulator that powers the digital core at 1.1V (nominal) from the 3.3V supply, which is not shown in Figure 7." It has proven difficult enough to find a PDF of the schematic (I don't have Cadence Allegro installed) that I am giving up.
- throwup238 2y agoThey don't. You still need those passive elements. See section 6.3 of the datasheet.