I found this:  Mfr. Part #NJU7200U33-TE2

Which is a Nisshinbo unit with super low operating current. Here is a link to the manufacturer's datasheet on the product. https://www.mouser.ca/datasheet/2/294/NJU7200series_E-1917479.pdf

It is listed as "Non-stocked" on www.mouser.ca

■ GENERAL DESCRIPTION
The NJU7200 series is a super low operating current C-MOS
3-terminal positive voltage regulator which contains internal accurate
voltage reference, error amplifier, control transistor and output
voltage setting resistor.
The regulation voltage is fixed by internal circuits and the following
line-up of different output voltage versions are available.
The NJU7200 series is suitable for battery operated items and
battery back-up systems because of low operating current and low
dropout voltage.
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