Comments on: DIY DCDC Stepup with Max756

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By: Electronics-Lab.com Blog » Blog Archive » DIY DC-DC Step-up converter with MAX756

Tue, 03 Aug 2010 12:43:51 +0000

[...] DC-DC Step-up converter with MAX756 – [Link] Tags: MAX756 Filed in Power supply | 1 views No Comments [...]

By: DeemyReurce

DeemyReurce — Thu, 07 Feb 2008 11:51:28 +0000

Iâ€™d prefer reading in my native language, because my knowledge of your languange is no so well. But it was interesting! Look for some my links:

By: Doodee

Doodee — Sat, 02 Feb 2008 02:44:16 +0000

Thanks for sharing

By: Nutter

Nutter — Tue, 14 Aug 2007 06:09:17 +0000

I highly recommend Embedded Controller Hardware Design by Ken Arnold for this purpose – it goes step-by-step (with examples) through a lot of the heavy material contained in datasheets such as timing diagrams, loading, and noise margin analysis. Of the ~20 electronics books I own, I feel that this book was the greatest help in *truely* understanding datasheets, and showing me exactly why you shouldn’t gloss over the “strange” parts – they are there for a very good reason!

By: Greg Lipscomb

Greg Lipscomb — Sun, 12 Aug 2007 16:51:01 +0000

Thanks for that Stefan. That is some good information

By: Decoding a component datasheet

Decoding a component datasheet — Sat, 11 Aug 2007 20:27:15 +0000

[...] DIY DCDC Stepup with Max756 – Link 3.3V/5V Adjustable-Output, Step-Up DC-DC Converters Datasheet (PDF) – Link [...]

By: Stefan Quder

Stefan Quder — Sat, 11 Aug 2007 18:55:19 +0000

Regarding the reference voltage, the data sheet also tells the purpose of that one Well, at least they have a story. It’s not unlikely that they just had an unused pin so they wired the most sensible internal signal to it.

Their story is that in case you have some external component like an ADC which needs some good reference voltage one can take it from pin 3. It’s low current, but approx. +-2% voltage precision. Which is not to bad, and in fact better than what one gets for 5V output (+-4%).

The block diagram in the data sheet tells how the same reference voltage is used internally in the chip.

(a) To detect low battery input. The reference voltage is 1.25 V. And surprise, surprise, low battery input is specified as being lower than 1.25 V

(b) To compare against the chip’s output voltage and drive the regulator to keep the output voltage stable.

By: Greg Lipscomb

Greg Lipscomb — Mon, 06 Aug 2007 02:27:49 +0000

I agree, it is pretty amazing.

By: Alan Parekh

Alan Parekh — Sun, 05 Aug 2007 07:35:08 +0000

Got to love what can fit onto a small chip these days!