Datasheet

Loop Characteristics
2-7
Test Setup and Results
2.6 Loop Characteristics
The TPS54380EVM–001 loop response characteristics are shown in
Figure 2–7 and Figure 2–8. Gain and phase plots are shown for each device
at minimum and maximum operating voltage.
Figure 2–7. Measured Loop Response, TPS54380, 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 – deg
Figure 2–8. Measured Loop Response, TPS54380, V
I
= 5.5 V
–60
–50
–40
–30
–20
–10
0
10
20
30
40
50
60
–180
–150
–120
–90
–60
–30
0
30
60
90
120
150
180
100
1 k
10 k
100 k
1 M
Gain
Phase
Gain – dB
f – Frequency – Hz
MEASURED LOOP RESPONSE
Phase – deg