Datasheet

Output Voltage Ripple
2-7
Test Setup and Results
Figure 2−8. Measured Loop Response, TPS54980, V
I
= 4
−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
Phase
Gain
Gain − dB
f − Frequency − Hz
MEASURED LOOP RESPONSE
Phase − deg
2.7 Output Voltage Ripple
The TPS54980EVM−022 output voltage ripple is shown in Figure 2−9. The
input voltage is 3.3 V for the TPS54980. Output current is the rated full load
of 9 A. Voltage is measured directly across output capacitors.
Figure 2−9. Measured Output Voltage Ripple, TPS54980
V
O
(ac) 10 mV/div
V
phase
1 V/div
t − Time − 1 µs/div