Datasheet

Time - 500 ns/div
5 V/div
50 mV/div
G008
V /AC Coupled, 20 Mhz Limited
IN
BW
SW Node 5 V/div
Time - 500 ns/div
5 V/div
20 mV/div
G007
V /AC Coupled
OUT
SW Node 5 V/div
Time - 500 ns/div
5 V/div
20 mV/div
G006
V /AC Coupled
OUT
SW Node 5 V/div
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2.7 Output Voltage Ripple
Figure 7 shows the EVM output voltage ripple. The output current is the rated full load of 6 A and V
IN
= 3.0
V. The ripple voltage is measured directly across the output capacitors.
Figure 7. TPS54678EVM-155 Output Ripple at V
IN
= 3.0 V and 6 A
Figure 8 shows the ripple at 6 A and V
IN
= 6.0 V. The ripple voltage is measured directly across the output
capacitors.
Figure 8. TPS54678EVM-155 Output Ripple at V
IN
= 6.0 V and 6 A
2.8 Input Voltage Ripple
Figure 9 shows the EVM input voltage ripple. The output current is the rated full load of 6 A and V
IN
= 3.0
V. The ripple voltage is measured directly across the input capacitors.
Figure 9. TPS54678EVM-155 Input Ripple at 3 V
IN
and 6 A
9
SLVU747–June 2012 TPS54678EVM-155 6-A, SWIFT™ Regulator Evaluation Module
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