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EEVblog 1475 - SMD Part Indentification & Substitution Search

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EEVblog:
Answering another viewer question. Can we identify or find an alternative for this SMD part?
https://twitter.com/PoiSolutionsLLC/status/1529065036433571840

gamalot:
I have only seen some parts of Diodes with such a marking pattern, 5 alphanumerics, no other elements, not even the dot for pin 1.

RES:
Maybe a factory production device? For example Ricoh has this dc/dc (SMD code ending at 3q)

3Q   R1210N231A   Ric   SOT-23-5   PWM step-up, 2.3V, 35..100kHz

Found via this SMD markings code site: http://www.smdmarkingcodes.com/Index/search?p=2&xuanze=1&markingcode=3q&baohan=2&fenzuan=0

thm_w:

--- Quote from: RES on May 30, 2022, 02:51:20 pm ---Maybe a factory production device? For example Ricoh has this dc/dc (SMD code ending at 3q)

3Q   R1210N231A   Ric   SOT-23-5   PWM step-up, 2.3V, 35..100kHz

Found via this SMD markings code site: http://www.smdmarkingcodes.com/Index/search?p=2&xuanze=1&markingcode=3q&baohan=2&fenzuan=0

--- End quote ---

It looks like they use a 4 digit code: https://pdf1.alldatasheet.com/datasheet-pdf/view/216239/RICOH/R1210N231A.html

But there are so many datasheets that don't even mention a package marking at all. Or custom code for automotive, who knows.

manu:
Hello,
I read from the original tweet that the ic could be identified. But, for my curiosity, what is the part number?

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