Let's say I want to make a 3D printer main board

LMR51450SDRRR - Voltage regulator [1]
TPS2116DRLR - Power source selector [2]
TXS0108ERGYR - Logic voltage translator [3]
LM61495RPHR - Voltage regulator [4]
LP5912-3.3DRVR - Voltage regulator [5]

Those are all some kind of voltage regulators I found in SmartPrintCoreH7x [6] open source main board. And those are not all. It seems to me that this board is a bit complicated. They managed to populate all the damn pins on STM32H7, and it has a lot of them. I'm wondering is it possible to make it less complicated, with fewer features but still functional. It needs to be functional enough so I can power my Ender 3 v2 with it, and operate it.

If I cut out all the parts that are not needed in my case. Is it possible to somehow incorporate a small LCD in the main board? I know how it can be done, however I don't know is it easy enough to program that screen in the firmware.

Another thing is that H7 chip is massive. It will look silly when the majority of chips pins will be empty. So i might use STM32 H5. It is smaller, however I think no one created a board with that one. There must be a reason.

Watching in this damn board there are so many connectors. What I need for an Ender 3V2 to work is 4 motor connectors, 3 limit switch connectors, power supply connector, 3 to 4 fan connectors, 2 heater connectors. That's 14 connectors all in all. On this picture is 45+. Damn.

[1] https://www.ti.com/lit/ds/symlink/lmr51450.pdf?ts=1786181709141&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FLMR51450

[2] https://www.ti.com/lit/ds/symlink/tps2116.pdf?ts=1786267085818&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTPS2116%252Fpart-details%252FTPS2116DRLR

[3] https://www.ti.com/lit/ds/symlink/txs0108e.pdf?ts=1786188794904&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTXS0108E%253Futm_source%253Dgoogle%2526utm_medium%253Dcpc%2526utm_campaign%253Dasc-tech-inno-dynpf_logic-cpc-pf-google-eu_en_int%2526utm_content%253Dprodfolddynamic%2526gclsrc%253Daw.ds%2526gad_source%253D1%2526gad_campaignid%253D23906084824%2526gbraid%253D0AAAAAC068F1P8iSdwG4ehAdqzZam5a1Uw%2526gclid%253DEAIaIQobChMIzInJ9vWQlgMVHBoGAB2LNx_uEAAYAiAAEgI1vfD_BwE

[4] https://www.ti.com/lit/ds/symlink/lm61495.pdf?ts=1786192190473

[5] https://www.ti.com/lit/ds/symlink/lp5912.pdf?ts=1786217375325&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FLP5912

[6] https://github.com/BoltzRnD/SmartPrintCoreH7x

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STM32H723ZGTx not even funny

STM32H7 pin connections for 3D printer main board

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