Texas Instruments TPS543820EVM, User Manual, Page: 15 / 38

Figure 3-14 and Figure 3-15 shows the loop characteristics for U2 with the 3 different ramp settings.
Frequency (Hz)
G
ai
n (
dB)
100 200 500 1000 10000 100000 1000000
-40
-20
0
20
40
60
Ramp = 4 pF
Ramp = 2 pF
Ramp = 1 pF
Figure 3-14. U2 Loop Gain with Different Ramp
Settings
Frequency (Hz)
Pha
se (
°)
100 200 500 1000 10000 100000 1000000
-120
-90
-60
-30
0
30
60
90
120
150
180
Ramp = 4 pF
Ramp = 2 pF
Ramp = 1 pF
Figure 3-15. U2 Loop Phase with Different Ramp
Settings
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SLUUCE9A – DECEMBER 2020 – REVISED APRIL 2021
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TPS543820EVM SWIFT™ Step-Down Converter Evaluation Module User's
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