7.3 Bode Plot
1
10
100
1000
Frequency - kHz
-40
-10
10
40
-30
-20
0
20
30
G
a
in
-
d
B
-45
0
90
135
45
P
h
a
s
e
-
o
Gain
Phase
Figure 7-5. CCM mode 5-V Loop Response Gain
and Phase, f
CO
= 95 kHz, PM = 48°
1
10
100
1000
Frequency - kHz
-40
-10
10
40
-30
-20
0
20
30
G
a
in
-
d
B
-45
0
90
135
45
P
h
a
s
e
-
o
Gain
Phase
Figure 7-6. CCM mode 3.3-V Loop Response Gain
and Phase, f
CO
= 90 kHz, PM = 63°
7.4 Transient Response
Figure 7-7. 5-V CCM Mode Load Transient
Figure 7-8. 5-V D-CAP Mode Load Transient
Performance Data and Typical Characteristic Curves
12
TPS51220A Buck Controller Evaluation Module User's Guide
SLUU381B – SEPTEMBER 2009 – REVISED FEBRUARY 2022
Copyright © 2022 Texas Instruments Incorporated
