Texas Instruments TPS543320EVM, User Manual, Page: 15 / 36

Figure 3-13 and Figure 3-14 shows the loop characteristics for U2 with the 3 different ramp settings.
Frequency (Hz)
Ga
in (dB
)
100 1000 10000 100000 1000000
-60
-40
-20
0
20
40
60
Ramp = 4 pF
Ramp = 2 pF
Ramp = 1 pF
Figure 3-13. U2 Loop Gain with Different Ramp
Settings
Frequency (Hz)
Ph
a
se
(
q
)
100 1000 10000 100000 1000000
-200
-150
-100
-50
0
50
100
150
200
Ramp = 4 pF
Ramp = 2 pF
Ramp = 1 pF
Figure 3-14. U2 Loop Phase with Different Ramp
Settings
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SLVUC07A – DECEMBER 2020 – REVISED MAY 2021
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TPS543320 SWIFT™ Step-Down Converter Evaluation Module User's Guide 15
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