AnsweredAssumed Answered

LTC3119 noise issue

Question asked by Markze on Jun 7, 2018
Latest reply on Jun 12, 2018 by JNoon



We experience the noise issue in LTC3119 during boost mode.  From 5.75V to 8V @ 2A.


During evaluation, we observe spike in each switching (following) and we would like to filter it. 

We attempt to improve it, such as:

      Reduce ESR capacitor & DCR inductor value

      Adding LDO filtering


However, there is no improvement. Could you advise if anything we can try to improve the signal integrity?


The Output is the power for RF device. Therefore, we would like to make it as clean as possible.


Appreciate your help in advance.


Thank you.