Looking for a nice 3.3v LDO

[Sasha Tim]

Hi everyone,

I'm looking for a THT 3.3v LDO that can handle 500ma of current for a 3.3v device. 

I cannot find anything available online. Perhaps I'm not looking in the right places?

73, 

VE3SVF

[Ed Moore]

There should be tonnes. Are you optimising for low loss or efficiency or? LM317 is a good starting point

On 13 Jan 2024, at 16:01, Sasha Tim <sasha...@gmail.com> wrote:



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[Sasha Tim]

That's one of the potential ones I was looking at. 

However, the specs say that the minimum input voltage for 0.5A is 3.75v, which is not ideal for a 1S lithium battery. 

73,

VE3SVF

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[Steve]

Ah the requirements become clearer - so I guess you are looking for something with about a 250mV drop out or lower at 500mA. Not easy.

    Steve

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[David Akerman]

The one I've used is MCP1825, max 500mA, dropout at 500mA typ 210mV max 350mV.

Dave

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[Steve]

Looks good - and dropout decreases with decreasing temperature.

    Steve

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