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SLUU186 − March 2004
12
TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070)
6.3 Output Ripple and Transient Response
Figure 6 shows the typical output voltage ripple with I
OUT
=15 A to be less than 20 mVpp.
The transient response is shown in Figure 7 as the load is stepped from 5 A to 15 A. The voltage deviation is
less than 60 mV.
Figure 6
t − Time − 1 µs/div
I
OUT
= 15 A
V
RIPPLE
(10 mV/div)
OUTPUT VOLTAGE RIPPLE
Figure 7
t − Time − 200 µs/div
V
OUT
= 50 mV/div
I
OUT
5 A/div
TRANSIENT RESPONSE
7 EVM Assembly Drawing and PCB Layout
Figure 8. Top Side Component Assembly