Datasheet

Output Voltage Ripple
2-8
2.8 Output Voltage Ripple
The output ripple voltage is plotted in Figure 2–10 with an input voltage of 5.0 V
and a load current of 3 A. The TPS54310 EVM has a typical output voltage
ripple of less than 33 mV
pp
. If the switching frequency is reduced, the output
ripple voltage is higher. The output ripple voltage can be decreased by using
a larger inductor, or by reducing the equivalent series resistance of the output
capacitor. Changing either of these components requires the feedback
compensation to be redesigned.
Figure 2–10. Measured Output Voltage Ripple
V
O
(AC)
10 mV/div
V
I
= 5 V
I
O
= 3 A
400 ns/div