Bluetooth products, we do have bigger ripples in VDDR pin, the range of 1.52 to 1.68 V, the corrugated normal? Effect doesn't affect the use of the product?
Albin Zhang:
it is absolute correct.
the DC2DC recharges the voltage of VDDR during chip standby. it is for power saving.
you can see recharge *** if you test the system current. it will pump the voltage to high, then RTOS manage the recharge happens again while it drops a threshold.
BR. AZ