Franc Zabkar wrote:
On Fri, 15 Aug 2008 13:12:04 -0400, Sergey Kubushin put
finger to keyboard and composed:
Franc Zabkar wrote:
On Fri, 15 Aug 2008 01:35:50 -0400, Sergey Kubushin put
finger to keyboard and composed:
TO252, 3 lines:
ST CHN
K922
LD33B
What is it?
Just a WAG, but could it be a low dropout 3.3V regulator?
It might be anything at all...
So this part is not out of some equipment that you are repairing?
No. I simply got several tubes of those as a part of a big lot.
I _HATE_ that practice of cryptic marking. I
can understand that e.g. SOT-23 doesn't have enough space to put the full
part number but TO252 is big enough to host a small poem.
I believe it could be an LD1117BDT33TR LDO 3.3V regulator:
http://www.datasheetarchive.com/pdf-...DSA-605028.pdf
Maybe 13 characters is a little too much for one stanza. ;-)
Yep, it is possible...
Some evidence in regard to the marking ...
http://www.micrel.com/_PDF/other/ana...id_marking.pdf
Analog Marking Information
LD33 MIC5206-3.3BM5 150mA Low-Noise LDO Regulator Fixed output
http://www-user.tu-chemnitz.de/~uwen/audigy/
ST LD33
+3.3V voltage regulator
http://www.diyaudio.com/forums/showthread/t-19911.html
4 regulators labelled something like 'LD33' (3.3v), LF50 (5V) ...
http://www.szljk.com/PART%20No6.htm
LD1117V33(MARKING:LD33V)
http://www.usbid.com/search/AddPartNoLogin_action.cfm
Search for LD33B and you will see ...
ld33b Description Mfr Date Code Qty Country
LD33B -- ST MICRO LOT: K922 300 US
Eh, this is a biggest mystery
They are selling a part exactly like mine
and there is no part No. either...
Thank you anyways, I'll try to burn one... However it doesn't look exactly
right to me because TO252 LD1117 parts from ST have "D" for package code,
not "B"...
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