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In Reply to: RE: Try these.... posted by Cougar on May 05, 2016 at 23:25:45
Are those drop-in replacement? I'm not techie enough to be able to modify a cricuit in order to insert a different part. I mean, changing the value of one cap and one resistor, if someone tells me wich and what, that I can do, but I can't calculate things myself.
If they're drop-in I could give those a try.
Are they significantly better than lm 317 / 337?
Follow Ups:
The spec sheet says that the 1085 needs a 10uf cap from out to ground for stability. It looks like this is not needed on the 317. Looks not to be a drop in replacement. Tweaker
Can't just drop it in, you need to solder it.
The pinout is different. Also, the back plate (case) is different in this instance.
If you want an improvement, check into the (LN,LDO)Low Noise, Low Dropout Vregs from LT.
Cheers!
They ARE the same pinout. But of course the negative and postive regs have different pinouts - so LM317 is the same as LT1085, and LM337 is the same as LT1022
Also they both come in the same TO-220 package.
Good thing about the LT1085/1022 is they are low dropout which means they don't need as much voltage across them as the normal LM317s
Cougar referenced the LT1033 and LT1085.
Please revisit the pin configuration.
Also, they're not LN and LDO.
Edits: 05/09/16
Typo - I meant LT1033 not LT1022 (which is actually an opamp.) But the pinouts are the same as the corresponding LM317/337
Check here:
LT1085 positive regulator
http://cds.linear.com/docs/en/datasheet/108345fh.pdf
LKM317 postitive regulator
http://www.ti.com/lit/ds/symlink/lm117.pdf
LT1033 negative regulator
http://cds.linear.com/docs/en/datasheet/1033fd.pdf
LM337 negative regulator
http://www.ti.com/lit/ds/symlink/lm137.pdf
I stand corrected on the pinouts. Thank you.
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