[TriEmbed] Powering ESP32 from an 8v golf cart battery

[The MacDougals]

Can’t find ams1117-3.3  TI’s L1117-3.3 is a direct replacement.

 

The data sheet shows 15v (max) for Vin and nothing for min.  What am I missing?

https://www.ti.com/lit/ds/symlink/lm1117.pdf <https://www.ti.com/lit/ds/symlink/lm1117.pdf?HQS=TI-null-null-digikeymode-df-pf-null-wwe&ts=1605410881526> 

 

---> Paul

 

 

From: Josh Wyatt <dragojdw at gmail.com> 
Sent: Sunday, November 15, 2020 7:47 PM
To: paulmacd at acm.org
Cc: TriEmbed <triembed at triembed.org>
Subject: Re: [TriEmbed] Powering ESP32 from an 8v golf cart battery

 

Why not use something like AMS1117-3.3? Minimum voltage on your 8 volt battery is going to be something like 6VDC.

 

-j

 

On Sun, Nov 15, 2020 at 7:38 PM The MacDougals via TriEmbed <triembed at triembed.org <mailto:triembed at triembed.org> > wrote:

How do I find an LDO that operates on 8 – 8.8 v?

I looked at a couple of datasheets and found linear regulators that take 9v (max) input.

I did not see a (min) spec for input v.

 

How can I tell if it works at 8?

 

For example:

https://www.njr.com/electronic_device/PDF/NJM2888_E.pdf

 

 

---> Paul

 

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