Author Topic: Req. Help ID'ing SMD Regulator  (Read 2583 times)

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Offline Scotophor

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Req. Help ID'ing SMD Regulator
« on: April 19, 2015, 07:27:46 am »
Hello, I'm trying to identify and get the datasheet for this linear voltage regulator. I don't recognize the logo, and haven't been able to match it in the usual places online. Google and other sites have not helped me with the component marking "A2NK". It appears to be an SOT-23-5/SOT-25 or similar package, output and input at top left and bottom left respectively in the attached (enhanced) photo. This is the only part on the board with any logo, and an other-than-generic part number.
« Last Edit: April 21, 2015, 04:52:41 am by Scotophor »
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Offline Psi

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Re: Req. Help ID'ing SMD Regulator
« Reply #1 on: April 19, 2015, 09:38:20 am »
My guess would be IKSemicon for the brand.
Their logo matches http://www.iksemi.com/

But I can't see any of their regs that use SOT-23-5.
« Last Edit: April 19, 2015, 09:56:02 am by Psi »
Greek letter 'Psi' (not Pounds per Square Inch)
 

Offline Scotophor

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Re: Req. Help ID'ing SMD Regulator
« Reply #2 on: April 24, 2015, 07:55:22 am »
Thanks for the tip. I tried to contact IK Semicon but they haven't responded.

Following a lead to Google's cache, I found a page which lists a regulator by Anwell Semiconductor Corp. of Taiwan, in a different package, as using the marking "2NK", but there the "N" is said to represent Vout=3.1 volts, while my part would seem to be 3.3 volts. Also, I haven't found any indication of Anwell using a logo like this.

The quest continues...
« Last Edit: April 24, 2015, 08:08:32 am by Scotophor »
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Online wraper

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Re: Req. Help ID'ing SMD Regulator
« Reply #3 on: April 24, 2015, 09:21:42 pm »
If you know the voltage, why to bother to identify actual part at all? There are bunch of pin compatible regulators available if you need replacement.
 

Offline Scotophor

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Re: Req. Help ID'ing SMD Regulator
« Reply #4 on: April 24, 2015, 11:03:36 pm »
There's a lot more to a regulator's specs than just output voltage...
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Online wraper

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Re: Req. Help ID'ing SMD Regulator
« Reply #5 on: April 24, 2015, 11:19:08 pm »
There's a lot more to a regulator's specs than just output voltage...
What so much more? At this place almost anything will work. You can check the datasheet if it meets the minimum voltage drop requirement if input voltage is only a bit higher than output but I guess it is 5V. Check maximum input voltage, but usually it is about 6-7V anyway for 95% of such regulators. Current rating should be sufficient for almost all ICs, but you can measure actual consumption if in doubt, in most cases limitation would be PCB heat sinking capability rather than part maximum rating. Also you could check if it is compatible with ceramic output capacitor if such used. <5 minutes to read the datasheet and be 99% sure that part is compatible.
 


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