TPS54383 Datasheet, PDF (38/52 Pages) Texas Instruments – 3-A DUAL NON-SYNCHRONOUS CONVERTER WITH INTEGRATED HIGH-SIDE MOSFET

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