Datasheet

www.ti.com
Design Example Test Results
SW 3.3 V
SW 5 V
V
IN
= 12 V
t − Time − 40 ns/div
10
40
70
0
90
100
50
I
LOAD
- Load Current - A
h - Efficiency - %
30
20
60
80
V
IN
= 13.2 V
V
IN
= 9.6 V
V
IN
= 12.0 V
V
OUT
= 5.0 V
V
IN
(V)
9.6
12.0
13.2
0 0.5 1.0 1.5 2.0 2.5 3.0
10
40
70
0
90
100
50
I
LOAD
- Load Current - A
h - Efficiency - %
30
20
60
80
V
IN
= 9.6 V
V
OUT
= 3.3 V
V
IN
(V)
9.6
12.0
13.2
V
IN
= 12.0 V
V
IN
= 13.2 V
0 0.5 1.0 1.5 2.0 2.5 3.0
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.
The following results are from the TPS54383-001 EVM.
Figure 40. Switching Node Waveforms
Figure 41. 5.0-V Output Efficiency vs. Load Current Figure 42. 3.3-V Output Efficiency vs. Load Current
38 Submit Documentation Feedback Copyright © 2007, Texas Instruments Incorporated
Product Folder Link(s): TPS54383 TPS54386