V

= 50 mV / div (ac coupled)

OUT

Time = 200 µsec / div

I

= 2 A / div

OUT

Load step = 1.25 A - 3.75 A, slew rate = 0.5 A / µsec

100

1000

10000

100000

1000000

−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

Frequency (Hz)

Gain

Phase

G005

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Test Setup and Results

2.5

Load Transients

Figure 5 shows the TPS54519EVM-037 response to load transients. The current step is from 25% to 75%

of maximum rated load at 5 V input. Total peak-to-peak voltage variation is as shown, including ripple and

noise on the output.

Figure 5. TPS54519EVM-037 Transient Response

2.6

Loop Characteristics

Figure 6 shows the TPS54519EVM-037 loop-response characteristics. Gain and phase plots are shown

for V

Figure 6. TPS54519EVM-037 Loop Response

7

SLVU523

– September 2011

TPS54519EVM-037, 5-A, SWIFT

™ Regulator— Evaluation Module

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© 2011, Texas Instruments Incorporated