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Original question:
TPS63020 / phase margin
Replies: 3
Views: 3748
Part Number: TPS63020
Hi,
I am troubled that the phase margin of TPS63020 can only be about 30 deg.
Please tell me how to improve the phase margin.Also, please tell me how much phase margin is required.
Best Regards,
Hasegawa
Best regards,Brigitte
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Hi Brigitte-san,
Thank you for your reply.
I understood that there is no problem even if the phase margin is 30 degrees.
It is a question.1)Where should I connect the feedforward capacitor?2)What is the minimum value of phase margin? For example, is it okay at 20 degrees?
-----------------------------------------------The components of my test are:
The schematic configuration is the same as Figure 7 Application Circuit in the data sheet (Rev. G).
R1 = 100kohmR2 = 10kohm + 150ohmC1 = 10uF x 2C2 = 10uF x 3C3 = 0.1uFL1 = 1.5uH
Vin = 5.4VVout = 5.43Vload 1.6A
The phase margin was measured with the FRA5097, adding 75ohm between R1 and Vout.
Best Regards,Hasegawa
In reply to user5236590: