I do a lot of circuits, and they all use the same basic design for power supply. OK, technically not quite, I have one for battery and one for USB+DC. But the latter is a basic buck regulator.
I revise the design from time to time and newer and better chips come out and as I learn more.
The latest design is using a TI buck regulator based design using a TPS562246. This is a big step up from the MD8942. The key difference is the old design was 600mA and the new design is 2A.
Do I need 2A?
For almost all of my boards the answer is no, the ESP32 can peak to 500mA with WiFi apparently. 600mA is close but enough. But some boards have other peripherals and you soon find you really want a supply rated over 600mA - even adding just 10 of the small WS2812 diodes can hit 100mA total when fully lit and some of my boards have more than that. Some have GPS modules and a lot more.
Why TI?
They are a well known and competent brand with good data sheets.
Will it make any difference?
The main difference is many of my designs would take a DC input 5V to 35V, and now 5V to 17V. I think for almost all cases this is not an issue. Being able to run off 12V DC or some 13.5V or similar battery based 12V, is what is needed (and I do all sorts of stuff at that level).
I think it will result is less ripple, and allow more peripherals within the power budget.
Fun?
As always, I am learning a lot - finding the right components, the inductor with low enough resistance, caps that work in the required temperature range, careful PCB layout. It has indeed been fun.
So, yes, many of my designs will undergo an upgrade over time.
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