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Author Topic: Using adjustable 1117 LDO as fixed 1.25v  (Read 661 times)

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Offline c64Topic starter

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Using adjustable 1117 LDO as fixed 1.25v
« on: March 12, 2022, 11:28:02 pm »
I need 1.25v power source. I have adjustable version of 1117 LDO (which has 1.25 reference voltage).

Is it OK if I just connect ADJ pin to ground and don't use any resistors?
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Offline floobydust

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Re: Using adjustable 1117 LDO as fixed 1.25v
« Reply #1 on: March 12, 2022, 11:31:56 pm »
Yes. It does have a need for a minimum load, likely 10mA.
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Offline magic

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Re: Using adjustable 1117 LDO as fixed 1.25v
« Reply #2 on: March 13, 2022, 07:31:21 am »
I have used LM317 with grounded ADJ pin as a replacement for some unidentified 1.2V output buck converter that blew up.
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Online wraper

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Re: Using adjustable 1117 LDO as fixed 1.25v
« Reply #3 on: March 13, 2022, 08:45:16 am »
Yes you can do so. Check a datasheet for a minimum load spec as it's different for various sorts of 1117.
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