Any hardware mod on PI Zero W to reduce power?

[propergol]

Hi,
I was wondering if there was any hardware mod to do on the PI Zero W to reduce power consumption.
I have seen a lot of comments over the net talking about removing the voltage regulator for something more efficient.

Of course I have already slim down everything that was possible in software : undervolting, governor, LED, HDMI.

I did gain some more mA by powering it @3.3V instead of 5V but can I go further by switching the voltage regulator by an other type?
Or maybe does this mod only for older PIs?

Thanks for your help

[drgeoff]

I did gain some more mA by powering it @3.3V instead of 5V but can I go further by switching the voltage regulator by an other type?
Or maybe does this mod only for older PIs?

That was only for early model RPis which used linear voltage regulators. Now they are switching types.

[propergol]

I did gain some more mA by powering it @3.3V instead of 5V but can I go further by switching the voltage regulator by an other type?
Or maybe does this mod only for older PIs?

That was only for early model RPis which used linear voltage regulators. Now they are switching types.

Well. Thanks a lot, you save me some money
I was about to buy a bunch of DC-DC boards.

[Gavinmc42]

I think 30ma is about as low as it gets.
The DDR memory is dynamic and must be refreshed.

It would be great to have a low power sleep, 100uA or less.
Videocore chips have been used in iPods etc so must have a low power mode.
VC4 hands controls to the Arm. Can it be handed back for sleep mode?

Going to lose the OS code in Dram if that is turned off. Small RTOS in cache?

The only simple solution I have thought of is turn power off completely and have something else waking the Pi up periodically.