LM25141-Q1: LM25141 phase margin test method on fix voltage

Imelda Zhang

Part Number: LM25141-Q1
Other Parts Discussed in Thread: LM25141

Here are too states of LM25141, fix and adjustable feedback.

In fix mode, FB is connected to VDDA.

If i want to test the phase margin on fix mode, should i add and adjust the resistance on FB and then carry out the test?

Is there any difference between fix and adjustable feedback? The result would be same?

If not, would you mind sending me the test method on different mode?

Thanks a lot.

over 1 year ago

+1 Timothy Hegarty over 1 year ago

TI__Mastermind 49057 points

Hi Imelda,

Yes, add the normal feedback divider and test in the usual technique. There will be no difference in the response (only the ratio of the feedback resistance matters, effectively the gain from VOUT to FB).

Regards,

Tim

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LM25141-Q1: LM25141 phase margin test method on fix voltage