Use TPS54329 to realize 12V to 3.3V 。Select the C20 68 pF, the phase margin of test is best. But the datasheet of TPS54329 on Page 13 descripts the capacitor is 5~22 pF。Can I choose 68 pF?
The Phase Margin Test Result when C20=68pF
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Use TPS54329 to realize 12V to 3.3V 。Select the C20 68 pF, the phase margin of test is best. But the datasheet of TPS54329 on Page 13 descripts the capacitor is 5~22 pF。Can I choose 68 pF?
The Phase Margin Test Result when C20=68pF
The loop respond is not good ,because the phase is decrease to the zero ,it will be unstable.
What's your output cap? For the 3.3Vout, the DS recommend the L=2.2uH, Cout=20~68uF