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So we’ve had a custom power supply from “Maxine” designed, so this is a four switch mode power supply, and so it’s “icy” controllable,
and it sort of Hoover’s up a lot of the shrapnel on the board, like
the discrete LDS that we had in the past.
A new power supply from "Maxine" which is a four switch mode power supply that is I.C. [integrated circuit] controllable. means that a lot of separate discrete Power supply components have been replaced by this one power supply chip.
So we originally had we had this we had a separate so we had separate switches we had a dual switcher for one v8 3v3, we had a ITC
nose of those are fixed switches we had a controllable switch an RTC
controllable switcher for the core voltage, and which back in the day
on Pi 2 of course was the product that gave us the gave us the death
Discussing/listing the components replaced by the new power supply.
And then we had an LDO for an SDRAM Braille which is now a switcher, we had two LDOs to do the SDRAM, we had an audio LDO, lots
of that’s been sucked into the corner, this is why it kind of looks
tidier, and of course that’s a because the the switcher it has better
static regulation accuracy, has a better load step performance on both
of those then turn into those those are both contributors along with
the changes that have happened in the in the main chip there are those
are things that contribute to that 200 MHz uplift you know in
Further components replaced by the new power supply - and the result of all the tidying up of the circuit board and new supply being more stable and accurate allowing the team to raise the CPU clock speed by 200 MHz.