SOT23-6 with marking code LC01 or 7300 - Page 1
Forum section: electronics / repair

author: spetros
author_rank: Contributor
timestamp: August 18, 2024, 07:35:51 am
content: Hello.I have tried to identify the following IC.As i can see from the other components near to it this is a bulk dc converter controller but i cannot find which one.Thank you for any help

author: Vicus
author_rank: Regular Contributor
timestamp: August 18, 2024, 11:37:05 am
content: Can you identify the pin function?Are you shure is not a linear device? Where is the coil?

author: spetros
author_rank: Contributor
timestamp: August 18, 2024, 11:55:21 am
content: Thank you for your answer.I am attaching another one photo of the board with some components removed.I am sure because it takes 12V and at the outputs 5V

author: fzabkar
author_rank: Super Contributor
timestamp: August 18, 2024, 02:47:52 pm
content: The topology looks more like a boost converter with an output voltage of 12V. Pin #3 looks like the feedback pin, with the FB voltage being 1.0V.Vout = 1.0V x (100K + 9100) / 9100 = 11.99V

author: spetros
author_rank: Contributor
timestamp: August 18, 2024, 04:10:31 pm
content: Thank you for your answer.I attach the circuit diagram of the unknown ic .Maybe it will help to identify it.Edit ( The diode is not shottky but a diode with marking L2V9 which is unknown too )Also i have found the same IC but with marking AJ2hD from another same board

author: Vicus
author_rank: Regular Contributor
timestamp: August 18, 2024, 04:38:28 pm
content: https://www.tme.eu/it/katalog/regolatori-ad-impulsi-circ-integrati_112882/?params=35:1443748;2900:1623616;364:1895193,1895165,1895140,1544378,1895166,1895209&productListOrderBy=1000014In this case it was quite easy.

author: fzabkar
author_rank: Super Contributor
timestamp: August 18, 2024, 04:47:36 pm
content: https://ipv4.google.com/search?q=filetype%3Adoc+OR+filetype%3Apdf+%22absolute+maximum%22+stepdown+converter+%220.8V%22++%22sot23-6%22Just a few of the results with matching pinout and FB = 0.8V ...LMR12010https://www.ti.com/lit/gpn/LMR12010MP2259https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MP2259/?srsltid=AfmBOopInIlHLUjkg28z_CGm9P-VTLPHeCjUkSL5VddM4ZhIcQvgdBV2TMI3253Shttps://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2001060933_TMI-TMI3253T_C478945.pdfRY8401https://file2.dzsc.com/product/23/04/03/1155400_110901434.pdfMP2451https://www.szhuge.com/file/productpdf/839914882425100.pdf

author: fzabkar
author_rank: Super Contributor
timestamp: August 18, 2024, 04:56:09 pm
content: Quote from: spetros on August 18, 2024, 04:10:31 pmAP5100WG / AP5100W, Diodes Inc, step-down converter, 1.2A, 1.4MHz, VIN 4.75V to 24V, marking AJxxx, SOT26https://www.diodes.com/assets/Datasheets/AP5100.pdfMP2359 looks compatible:https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MP2359/document_id/228?srsltid=AfmBOopTtu2j1NZVhDFMtHLM87ERnWK7vWUJrdpoFSksD4QmzoLYddZ_Also AMS1073 ...http://www.datasheet.hk/download.php?id=1975839&pdfid=9218D18D47689B304860A1D6AEF396E8&file=0489\ams1073_7244640.pdfThe diode could be MBR120VLSFT1 or NRVB120VLSFT1G (Schottky Power Rectifier, Surface Mount, 1.0 A, 20 V).http://markingcodes.com/search/c/L2v

author: spetros
author_rank: Contributor
timestamp: August 19, 2024, 03:00:24 am
content: THANK YOU fzabkar for your detail informationYou were very helpfull