Datasheet
2.5 Load Transients
V
OUT
I
OUT
50mV/div
2 A/div
t-Time-1ms/div
2.6 Loop Characteristics
-60
-50
-40
-30
-20
-10
0
10
20
30
40
50
60
f-Frequency-Hz
-180
-150
-120
-90
-60
-30
0
30
60
90
120
150
180
Gain
Phase
10
100 1k 10k
100k 1M
Gain-dB
Phase-deg
Test Setup and Results
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The TPS54917EVM-367response to load transients is shown in Figure 4 . The current step is from
approximately 25% to 75% of maximum rated load at 3.3 V input. Total peak-to-peak voltage variation is
as shown, including ripple and noise on the output.
Figure 4. TPS54917EVM-367 Transient Response
The TPS54917EVM-367loop-response characteristics are shown in Figure 5 . Gain and phase plots are
shown for V
IN
voltage of 3.3 V. Load current for the measurement is 4.5 A.
Figure 5. TPS54917EVM-367 Loop Response
TPS54917EVM-367 9-A, SWIFT™ Regulator Evaluation Module6 SLVU278 – December 2008
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