From: David C Brown <dcb.home@gmail.com>
To: Microcontroller discussion list - Public. <piclist@mit.edu>
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Date: Tue, 28 Apr 2020 10:41:49 -0700
Subject: Re: [EE] Voltage regulator with high input voltage
Thread-Topic: [EE] Voltage regulator with high input voltage
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Hi Bob

I had already reached the conclusion that the LMetc is the engineering
solution.   For a one off project the cost of a few pounds is not
significant and it speeds up the job
__________________________________________
David C Brown
43 Bings Road
Whaley Bridge
High Peak                           Phone: 01663 733236
Derbyshire                eMail: dcb.home@gmail.com
SK23 7ND          web: www.bings-knowle.co.uk/dcb
<http://www.jb.man.ac.uk/~dcb>



*Sent from my etch-a-sketch*


On Tue, 28 Apr 2020 at 17:50, Bob Blick <bobblick@outlook.com> wrote:

> Hi David,
>
> I second the suggestion of an LM2576HV. Even though it's a relatively
> expensive part, it'll be simple to build something from it and you won't
> need to spend much time getting it to work. Also, it's a tried-and-true
> part and is designed to be tough and dependable. You can trust that it wi=
ll
> actually give you 5 volts under all situations.
>
> Friendly regards, Bob
>
> ________________________________________
> From: piclist-bounces@mit.edu <piclist-bounces@mit.edu> on behalf of
> David C Brown
> Sent: Monday, April 27, 2020 10:24 AM
> To: Microcontroller discussion list - Public.
> Subject: [EE] Voltage regulator with high input voltage
>
> I am designing a current monitor for my e-bike.  Using an INA169 hi side
> current senor into a mid range PIC with a two digit LED display.
>
> Problem is getting the 5 volts for the PIC from the e bike battery which =
is
> nominally 36v but can rise to over 40 volts when fully charged.  Most sma=
ll
> linear regulators seem to be rated at 36v..
>
> Current would be a couple of milliamps with the display off (most of the
> time).  Nearer 100 with the display on..
>
> Any suggestions
>
>
>
> --
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