EEVblog 1475 - SMD Part Indentification & Substitution Search

• EEVblog 1475 - SMD Part Indentification & Substitution Search
  Posted by EEVblog on 26 May, 2022 22:33
• Answering another viewer question. Can we identify or find an alternative for this SMD part?
  https://twitter.com/PoiSolutionsLLC/status/1529065036433571840
  
  
  
• #1 Reply
  Posted by gamalot on 28 May, 2022 12:04
• 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.
• #2 Reply
  Posted by RES on 30 May, 2022 14:51
• 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
  
• #3 Reply
  Posted by thm_w on 30 May, 2022 21:14
• Quote from: RES on 30 May, 2022 14:51

  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
  

  
  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.
• #4 Reply
  Posted by manu on 01 Jun, 2022 07:08
• Hello,
  I read from the original tweet that the ic could be identified. But, for my curiosity, what is the part number?
• #5 Reply
  Posted by thm_w on 01 Jun, 2022 21:41
• Quote from: manu on 01 Jun, 2022 07:08

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

  
  They did not say it could be identified, just "figured it out" with Daves help, so presumably what replacement part could be installed.