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CC1352P: CC1352P Ripple on internal DCDC

Part Number: CC1352P


We have custom board with Power block based on LAUNCHXL-CC1352P and application based on simple peripheral,

Our problem is some of boards starts consumpting too much current with a ripple on DCDC output. 

We tried use empty project to eliminate software cause and result is same. DCDC enabled by example default.

Chip revision: CC1352P1F3 Rev:E

SDK: 4.40

Ripple on DCDC Output (1-2 different boards, 3 Peaks zoomed in)

Current Consumption(Avarage rises from ~30 uA's to 2-3 mA's), Periodic consumption due problem ~2.5mS Ipeak 19mA

What can be cause some of boards starts to do this behavior after a while?

Thank You!