Part Number:TPS40210
Hi Expert,
This is Ikoma from TIJ. I got an e-mail from Minami-san to clarify the answer in the previous thread linked below.
https://e2e.ti.com/support/power-management/f/196/t/752259?tisearch=e2e-quicksearch&keymatch=We
Could you keep supporting question from Minami-san? Since the previous thread is already locked, Let me open this new thread.
Minami-san would like to know how to fix the value of R1 and C11. According to the answer in the previous thread, 0.1uF for C11 and 4.7 to 10ohm are recommended to construct low pass filter to prevent high switching noise. So, cutoff frequency of the low pass filter will be about 159k ~ 338kHz and will have enough attenuation like <-40dB for >10MHz band. And you expect the high switching noise happen at >10MHz band. Correct?
Could you show him such guide line to fix the value of R1 and C11 for TPS40210? Maybe it’s also related with the layout though.
Thanks for your help in advance.
Regards,
Ikoma
