Datasheet

Output Voltage Regulation
2-9
Test Setup and Results
2.9 Input Ripple Voltage
The input ripple voltage for a 6-A load is shown in Figure 213 with a switching
frequency of 350 kHz and in Figure 214 with a switching frequency of
550 kHz. With a switching frequency of 550 kHz, the input ripple is
approximately 200 mV
pp
. The input ripple voltage can be made lower by
adding capacitance to the input.
Figure 213. Measured Input Voltage Ripple at 350-kHz Operation
V
I
(AC)
10O mV/div
V
I
= 5 V
I
O
= 6 A
1 µs/div
Figure 214. Measured Input Voltage Ripple at 550-kHz Operation
V
I
(AC)
10O mV/div
V
I
= 5 V
I
O
= 6 A
400 ns/div