Author Topic: Replacing a fixed and a adjustable regulator  (Read 940 times)

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Offline gkmaiaTopic starter

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Replacing a fixed and a adjustable regulator
« on: January 06, 2019, 02:41:32 am »
I looking for some help replacing a couple regulators. IC 101 and 107 on the schematic attached.

First one is a s-81250hg and the closest I found was:
https://www.ablic.com/en/doc/datasheet/voltage_regulator/S812C_E.pdf

Second one is a TK11640. I am struggling with this one because it is not fixed. It goes in increments of 0.5 from 2v up to 5v.

S-81250HG is here: https://www.digchip.com/datasheets/parts/datasheet/432/S-81250HG-pdf.php
TK11640  is here: https://www.datasheetarchive.com/pdf/download.php?id=6b04dbd83b9c95ca8b5539f6738b79f62a036b&type=O&term=TK1164
 

Offline mvs

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Re: Replacing a fixed and a adjustable regulator
« Reply #1 on: January 06, 2019, 07:31:10 pm »
Second one is a TK11640. I am struggling with this one because it is not fixed. It goes in increments of 0.5 from 2v up to 5v.
They all are fixed. TK11640 is 4.0V, TK11630 (IC107) is 3.0V, S-81250HG (IC101) is 5.0V...
 

Offline Zero999

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Re: Replacing a fixed and a adjustable regulator
« Reply #2 on: January 06, 2019, 07:47:08 pm »
The TK11640 is fixed and is made to the required voltage by the manufacturer.

No doubt all of those regulators could be replaced with fixed/adjustable low dropout regulators with a suitable current rating.
 

Offline gkmaiaTopic starter

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Re: Replacing a fixed and a adjustable regulator
« Reply #3 on: January 06, 2019, 09:01:04 pm »
Thanks guys, those are the ones I found that are the closest ones with matching pins.

Sorry for such basic question. I am a beginner and don't want to get it wrong.

3v - Tk11630
https://www.digikey.co.nz/short/p73f72

5v - s-81250hg
https://www.digikey.co.nz/product-detail/en/ablic-u-s-a-inc/S-812C50AY-B2-U/728-1066-ND/3609196
« Last Edit: January 06, 2019, 09:13:43 pm by gkmaia »
 


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