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SMD Device Marking Code

davidge

Sep 2, 2011
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Does anyone know what is the device that has marking "LAC" on it? It is SOT23-5 package.

Thanks,
David
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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Jan 21, 2010
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My information suggests is could also be an RP171N591B (5.9V 150mA)

http://www.dz863.com/datasheet-8205207663-RP171N591B_150ma-10v-Input-Ldo-Regulator/

or even an XC6219A432MR, which is a 4.3V 240mA reg. It's also on an sot-25 package which appears to be similar...

Since they're all LDO regulators, you can probably get a good indication of which is the most likely from the input voltage. ...And from the way they are connected in the circuit.
 

OLIVE2222

Oct 2, 2011
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Hi,


The RP171N591B as a 5 digits marking. LAC + 2 digit for the lot number
The XC6219A432MR as a 4 digits marking.1 L digit marking for the product serie + 2 digits for the voltage + 1 digit for the lot number.

cheers,
Olivier
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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Your information sounds better than mine :)

What is your source?
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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No, what I meant was, what is your source for the cross-reference information between case markings and devices?
 

OLIVE2222

Oct 2, 2011
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Steve,

misunderstanding on my side. In fact I just Google it. With LAC SOT23 query it's the second result. I find this is better than dedicated tools as it also drill inside datasheets and it's more up to date. But at the end you find more candidates than me ! :)

Olivier
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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I should add that to the sticky thread!

Thanks
 

OLIVE2222

Oct 2, 2011
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Sure, it will help to promote this Californian start up company :D
 
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