The ubiquitous IC company you probably never heard about.....

[schmitt trigger]

Or perhaps you have.
I am talking about QX Micro Devices. http://www.qxmd.com.cn/en/?index.html

If you have ever used or seen a solar-cell powered LED garden light, it will most likely utilize one of its ICs, QX5251/5252
The datasheet only has the barest details, but the minimalist IC architecture concept is actually quite clever.