DCDC inductor arrangement ?

[JB21]

I have Rx sensitivity issues when DCDC is enabled

The 52832 datasheet shows these connection: DCC: 10 uH, DEC4: 15 nH

When switching both inductors I get better sensitivity DCC: 15 nH, DEC4: 10 uH

What purpose does 15 nH have? Shouldn't it attenuate harmonics of 8 MHz ? If so, then 15nH should be at the 8 MHz switching side which is DCC, right?

[Jørn]

The 10uH and the 15nH should both be placed in series with DCC. The second terminal of the 15nH inductor is connected to the node shared with C10 and DEC4, but it is not in series with DEC4. Could you please provide a picture of your schematics, showing your arrangement of the two inductors.

[JB21]

I accidentally clicked on "answer" and cannot undo that anymore

The circuit is the same as in the datasheet, only 15 nH and 10uH are switched

so: DCC - 15nH - 10uH - DEC4 - 1uF - Gnd

[Jørn]

Could you please post a picture of your schematic and your layout surrounding the nRF for us to evaluate. If your design is confidential you can create a mypage ticket over at nordicsemi.com.