I have been testing the evaluation board with a Li-ion battery and CC2530 microcontroller. When the battery goes down 3 [v] the integrated one starts to oscillate by turning off my microcontroller, in addition to that a high tone from the IC is omitted and the circuit consumption increases from 50 [mA] to 80 [mA] Is this expected result of this IC? How can I reduce the consumption of the integrated? regards