a few years ago I heard about such a device. Could you point it me ?
Is it still available from AD ?
Input voltage may be 12V or even 7V.
How little noise are you wanting?
You can use the ADP2384 with a secondary filter to achieve "low noise". I can post a schematic and layout that we used. The design is going to be layout critical, you will want to copy our layout.
let me know if this helps
please see the attached files
thank you for the answer.
I expect the switching noise level of lest than 100uV.
I need 5V and 3.3V/300mA power source.
I have already found in net a solution of tandem DC-DC and LDO linear regulator, but want too check if switching regulator only is possible in low power(1-2W) professional audio application.
yes the circuit prescribed in the first response will work.
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