What is this boost converter chip?

[ivoras]

Hello,

I've ordered a couple of these boost converter modules from AliExpress: https://www.aliexpress.com/item/0-7-5V-to-3V-3-3V-5V-DC-DC-Boost-Converter-voltage-Step-up-Module/32800430445.html and they've proven to be unexpectedly good as far as quiescent power consumption is concerned, so I'm trying to re-create them on my own PCB -- but I can't seem to find what that boost converter chip is.

I've tried to magnify the image and read the markings; it looks something like FO2188A, but I can't seem to find any components with that model name. Any ideas what is this chip?

Alternatively, can someone suggest a small, low-input-voltage (<= 0.7V), low quiescent current and cheap boost converter IC with similar characteristics?

[Neilm]

What sort of quantities are you talking about? If you are only going for a few then that will change the suggestions. If you are happy for a few thousand then try looking at the main suppliers website - I have always found the TI site easy enough to search. A few moments gave me the TPS61099 that needs a an inductor, a couple of resistors and caps. Chip is $0.67.

[floobydust]

From the logo it seems to be chinese semi MicrOne ME2188.
PFM boost-converter. Rated 0.9-5V input, 1.8-5V output; 350kHz.

I wonder about the modules 0.7V input spec.

[floobydust]

It seems to start at 0.8V or so and run lower, depending on load.
I'm not sure what the A22 vs A30 suffix is about.