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Old 11th February 2013, 01:03 PM   #1
back is offline back  Greece
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Default +-85volt regulator

hello everybody.i want to regulate +-85volt for a lme49810.any regulators working that high voltage especially the negative?

Last edited by back; 11th February 2013 at 05:06 PM.
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Old 11th February 2013, 01:25 PM   #2
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This is a variant of the "Two Transistor Regulator". Change the value of the voltage reference to a 1N4754 and the output will be 2x the zener breakdown voltage.

Click the image to open in full size.

You can also use the LM317/LM337 in the Maida configuration.
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Old 11th February 2013, 02:03 PM   #3
back is offline back  Greece
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nice and simple. maida configuration?where can i find it?
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Old 11th February 2013, 02:31 PM   #4
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http://www.ti.com/lit/an/snoa648/snoa648.pdf
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Old 11th February 2013, 03:53 PM   #5
back is offline back  Greece
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Quote:
Originally Posted by jackinnj View Post
thanks
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Old 11th February 2013, 04:48 PM   #6
JMFahey is offline JMFahey  Argentina
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Just curious: what *is* an "LME89910"?
Mr google has no clue.
Not even one.

And why does it need +/-85V supplies?
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Old 11th February 2013, 04:56 PM   #7
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LME49810???
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Old 11th February 2013, 05:04 PM   #8
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For currents <20mA up to 450V you can use this:-

http://www.supertex.com/pdf/datasheets/LR8.pdf

If you live in Europe (and maybe elsewhere if you pay the postage) you can order them here:-

Tube-Town Online-Store - Spannungsregler

...better to add them to a bigger order as post is ~10Euros.
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Old 11th February 2013, 05:05 PM   #9
back is offline back  Greece
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ooops a typo yes lme49810 only needs 10ma.

Last edited by back; 11th February 2013 at 05:08 PM.
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Old 11th February 2013, 05:38 PM   #10
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LME8910 PSRR is 110dB -- you probably don't need a regulator.
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