TPS54383, TPS54386
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SLUS774B–AUGUST 2007–REVISED OCTOBER 2007
The total power dissipation is PDISS=0.198+0.136+0.017+0.017+.066 = 434 mW.
Design Example Test Results
The following results are from the TPS54383-001 EVM.
V
IN
= 12 V
SW 3.3 V
SW 5 V
t − Time − 40 ns/div
Figure 40. Switching Node Waveforms
100
90
80
70
60
50
40
30
20
100
V
= 9.6 V
IN
V
V
= 9.6 V
IN
90
80
70
60
50
40
30
20
= 12.0 V
IN
V
= 13.2 V
IN
V
= 13.2 V
IN
V
= 12.0 V
IN
V
= 5.0 V
(V)
V
= 3.3 V
OUT
OUT
V
V
(V)
IN
IN
9.6
9.6
12.0
13.2
12.0
13.2
10
0
10
0
0
0.5
1.0
1.5
2.0
2.5
3.0
0
0.5
1.0
1.5
2.0
2.5
3.0
I
- Load Current - A
I
LOAD
- Load Current - A
LOAD
Figure 41. 5.0-V Output Efficiency vs. Load Current
Figure 42. 3.3-V Output Efficiency vs. Load Current
38
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