Re: Voltage regulator ID

From: Franc Zabkar (fzabkar_at_optussnet.com.au)
Date: 08/26/04 

Date: Fri, 27 Aug 2004 07:40:24 +1000

On Thu, 26 Aug 2004 11:41:52 +1200, David M
<news_NO@SPAM_moorhouse.net.nz> put finger to keyboard and composed:

>Hi,
>
>I need a bit of help with the identification of the following voltage
>regulator.
>
>It's on the circuit board of a Rainmatic 3000 irrigation controller -
>which I don't have schematic for.
>
>>From screen printing on the circuit board and checking with my DMM, I
>have the following:
>
>Package type looks like a TO-252 or similar
>(approx 6mm 0.25in square)
>
>(In fixed pitch font - top view)
>
> -------
> | | ---- Gnd
> | 0 | ---- In (also connected to die/heatsink)
> | | ---- Out
> -------
>
>Most of the markings on the front are illegible, can see 31 somewhere.
>
>I've tried looking at the LM117/317 but the pinouts are wrong.
>
>Voltage in is 6 volts - Vout is current 0v (hence why I need to fix
>this !).

Does it look like this?
http://www.nteinc.com/graphics/diag59b.gif

If so, then it could be one of Sanken's SIxxxx series of 3-terminal
regulators, eg SI-3062V.

See http://www.allegromicro.com/skncatlg/regulator/regulator.pdf

If you can't find the SI-3062, then get an SI-3052, lift the ground
pin, and boost it with resistors in the same way as for an adjustable
regulator.

- Franc Zabkar 

-- 
Please remove one 's' from my address when replying by email.

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