From: Bob Blick <bobblick@outlook.com>
To: Microcontroller discussion list - Public. <piclist@mit.edu>
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Date: Tue, 28 Apr 2020 09:49:24 -0700
Subject: Re: [EE] Voltage regulator with high input voltage
Thread-Topic: [EE] Voltage regulator with high input voltage
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Hi David,

I second the suggestion of an LM2576HV. Even though it's a relatively expen=
sive 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 i=
s designed to be tough and dependable. You can trust that it will 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=20
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 small
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



--=20
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