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adkinsjd
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Last seen:3 years 1 month ago
Joined:2015-07-31 06:08
External Voltage Regulation

I was wondering if it is possible to completely bypass the internal boost/buck regulator inside the DA14580, and instead supply a steady 1.41V to VDCDC and VDCDC_RF. I am trying to achieve a design that is both very space and power constrained, therefore the 80-85% efficiency of the switching regulator and the size of the 2.2uH switching inductor both make the design more difficult.

I understand this is a strange request, but an informed response from an applications engineer with more knowledge of the internal power routing in the chip would be greatly appreciated.

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fkalinian
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Last seen:5 years 5 days ago
Joined:2016-04-07 18:44
I actually have the same

I actually have the same question. On the datasheet it says the DC-DC converter can be disabled but does not mention with which register..

Also, if the DC-DC Converter is disabled, can we supply a regulated 0.9 - 3.6V directly to one of the DA14580 pins?

I am using an external PMIC with a bridge rectifier and would like to feed the output directly to DA14580.

No one answered the previous subscriber's question.... Is that because no one at Dialog has an answer? Please let us know, we have customers that want questions answered!

MT_dialog
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Last seen:1 month 4 weeks ago
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Joined:2015-06-08 11:34
Hi fkalinian,

Hi fkalinian,

Please check the following post, it explains how one can operate without using the internal DCDC converter,

http://support.dialog-semiconductor.com/disable-buck-converter

Thanks MT_dialog

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