TPS54231
www.ti.com .............................................................................................................................................................................................. SLUS851–OCTOBER 2008
APPLICATION CURVES
100
90
100
90
80
70
60
50
40
30
80
70
60
50
40
30
V
= 7 V
IN
V
= 15 V
IN
V
= 28 V
V
= 28 V
IN
IN
V
= 15 V
V
= 24 V
IN
IN
V
= 7 V
IN
V
= 24 V
IN
20
10
0
20
10
0
0.14 0.16
0.1 0.12
0.18 0.2
0.06 0.08
0
0.02 0.04
0
0.25
0.5
0.75
1
1.25
- Output Current - A
1.5
1.75
2
I
- Output Current - A
I
O
O
Figure 15. TPS54231 Efficiency
Figure 16. TPS54231 Low Current Efficiency
0.2
0.15
0.1
0.05
0
0.15
0.1
I
= 0 A
O
I
= 1 A
O
V
= 7 V
IN
V
= 15 V
0.05
0
V
= 24 V
IN
I
= 2 A
IN
O
-0.05
-0.1
V
= 28 V
IN
-0.05
-0.1
25
30
5
15
20
10
0
0.25
0.5
0.75
1
1.25
1.5
1.75
2
V - Input Voltage - V
I
- Output Current - A
I
O
Figure 17. TPS54231 Load Regulation
Figure 18. TPS54231 Line Regulation
60
50
40
30
20
160
Gain
Vout
110
60
Phase
Load Current
10
0
10
-10
-40
-90
-20
-30
10
100
1k
10k
100k
1M
f - Frequency - Hz
Figure 19. TPS54231 Transient Response
Figure 20. TPS54231 Loop Response
Copyright © 2008, Texas Instruments Incorporated
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