Datasheet

SLUU182 − March 2004
16
High-Performance Dual Synchronous Buck Conversion Using the TPS5124
5.4 Output Ripple Voltage and Load Transient
The output ripple is about 20 mV
P−P
at 15 A on Channel 1 (3.3 V) output and 15 mV
P−P
at 10 A
on Channel 2 output as shown in Figure 11.
Figure 12 shows the load transient response. For Channel 1 (3.3 V), when the load steps from
0 A to 8.5 A, the overshoot and undershoot voltages are about 150 mV. For Channel 2 (1.5 V),
when the load steps from 0 A to 7.5 A, the overshoot voltage is approximately 220 mV and the
undershoot voltage is approximately 140 mV.
Figure 11. Output Ripple
Label
Label
t − Time − 2 µs/div
Figure 12. Load Transient Response
V
OUT1
I
LOAD
Stepping from 0A to 8.5 A
t − Time − 40 µs/div
Figure 13. Load Transient Response
V
OUT2
I
LOAD
Stepping from 0A to 7.5 A
t − Time − 40 µs/div