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CC1352P: Ripple on internal DCDC

Part Number: CC1352P
Other Parts Discussed in Thread: ENERGYTRACE

Hello E2E

We still have struggle on ripple problem. After battery inserted to our board some of our products starting consuming excessive power (30 uA normal consumption - > 500uA DCDC after problem consumption) and starting to generate sawtooth ripple on DCDC output at Vpp ~120mV and different frequencies on different boards. Measurements from two sides of DCDC coil is like below.


We created a test setup with 40 devices. Half of theese devices powered with supply at 3v and other half 3.6v. We thought maybe this problem caused by battery but seems it not relevant on these tests. What can be root cause some of devices breaks down in time?


We made HW revisions but still it happens. I attaching layout of DCDC side, can you verify that the layout is OK?

Thank You!