Datasheet

2.6 Loop Characteristics
-60
-50
-40
-30
-20
-10
10
20
30
40
10 100 1k 10k 100k 1M
Frequency(f)-Hz
Gain-dB
-180
-90
-60
-30
0
30
Phase(°)-deg
0
50
60
-150
-120
180
150
60
90
120
Gain
Phase
2.7 Output Voltage Ripple
www.ti.com Test Setup and Results
The TPS54140EVM-429 loop-response characteristics are shown in Figure 6 . Gain and phase plots are
shown for V
IN
voltage of 34V. Load current for the measurement is 1.5 A.
Figure 6. TPS54140EVM-429 Loop Response
The TPS54140EVM-429 output voltage ripple is shown in Figure 7 . The output current is the rated full
load of 1.5 A and V
IN
= 34 V. The ripple voltage is measured directly across the output capacitors.
Figure 7. TPS54140EVM-429 Output Ripple
SLVU285 – March 2009 TPS54140EVM-429 1.5-A, SWIFT™ Regulator Evaluation Module 7
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