Datasheet

Loop Characteristics
2-9
Test Setup and Results
2.6 Loop Characteristics
The TPS54x73EVM-225 load response characteristics are shown in
Figure 2–9, Figure 2–10, and Figure 2–11. The current step is from –50% to
50% of maximum rated load. Total peak-to-peak voltage variation is as shown,
including ripple and noise on the output.
Figure 2–9. Measured Loop Response, TPS54673, V
I
= 3 V
–60
–50
–40
–30
–20
–10
0
10
20
30
40
50
60
100 1 k 10 k 100 k 1 M
–180
–150
–120
–90
–60
–30
0
30
60
90
120
150
180
Gain
Phase
Gain – dB
f – Frequency – Hz
MEASURED LOOP RESPONSE
Phase – Degrees
Figure 2–10. Measured Loop Response, TPS54673, V
I
= 6 V
–60
–50
–40
–30
–20
–10
0
10
20
30
40
50
60
100 1 k 10 k 100 k 1 M
–180
–150
–120
–90
–60
–30
0
30
60
90
120
150
180
Gain
Phase
Gain – dB
f – Frequency – Hz
MEASURED LOOP RESPONSE
Phase – Degrees