Chinese copy of Semtech TS30042 buck converter IC?

[hanakp]

The current semiconductor shortage affects Semtech TS30042 buck converter IC, which is used in one of products I helped to design. I painstakingly checked all other similar converters from "respectable" producers, but found no drop-in replacement. Maxim makes some very similar ICs, but with different pinout. Is there any chance that some obscure chinese company copied TS30042? And if so, how can I check it exists? Is there a chinese semiconductor e-shop which can filter the parts by parameters, like Mouser or Digikey? The e-shop may be completely in Chinese, I have a colleague who speaks the language. Thanks!

[ebclr]

If they are real ones, fakes or copies  I don't know But they are widely available in China

https://s.taobao.com/search?q=TS30042&type=p&tmhkh5=&from=sea_1_searchbutton&catId=100&spm=spm%3Da2141.241046-global.searchbar.d_2_searchbox

[asrinur]

looks like it's a tough job. You can't possibly look for it so specifically. But it never hurts to try to ask your friend.

[ibnufachruddin]

Thanks

[hanakp]

Today, I noticed one thing: you can't google SMD marking codes on these Semtech ICs. They're in the datasheet on page 17, but the table is a vector image without text layer. I guess the mexican slave labor hires who usually work on such documents these days don't yet understand the importance of search engine indexing (and/or their corporate masters don't care). I needed them recently, so the codes are:

Part Number	Voltage Assign	Marking Code
TS30041-M000QFNR	ADJ	41M00
TS30041-M015QFNR	1.5V	41M15
TS30041-M018QFNR	1.8V	41M18
TS30041-M025QFNR	2.5V	41M25
TS30041-M033QFNR	3.3V	41M33
TS30041-M050QFNR	5.0V	41M50
TS30042-M000QFNR	ADJ	42M00
TS30042-M015QFNR	1.5V	42M15
TS30042-M018QFNR	1.8V	42M18
TS30042-M025QFNR	2.5V	42M25
TS30042-M033QFNR	3.3V	42M33
TS30042-M050QFNR	5.0V	42M50

[hanakp]

Fun fact: Google blacklists this thread, likely because of my "insensitive" quip about mexican labor. Try it yourself, search for "41M18 Semtech". In Bing, DuckDuckGo, Yahoo or Lycos, this thread appears on the first page of results. In Google.cz, there are only 2 pages of results and this thread is not among them.

But I guess it's not all that surprising, after 3+ years of brazen (and government-sanctioned) suppression of entire sites in the name of "fighting misinformation". One has to love the euphemisms they find for censorship.

Eh, I think I'll just copy and paste the table to a new thread.

[mariush]

MCP16323 seems to have the same footprint and pinout : https://media.digikey.com/pdf/Data%20Sheets/Microchip%20PDFs/MCP16323.pdf

probably the last digit is used for other voltages.  Also note that it's marked as obsolete, and the replacement MIC24046 is not using the same footprint.