Datasheet

0.001 0.01 0.1 1 10 100
I - Output Current - A
OUT
0
10
20
30
40
50
60
70
80
90
100
h - Efficiency - %
V = 8 V
IN
V = 12 V
IN
V = 20 V
IN
Auto-Skip
V = 0.9 V
OUT
0
10
20
30
40
50
60
70
80
90
100
h - Efficiency - %
0.001 0.01 0.1 1 10 100
I - Output Current - A
OUT
V = 8 V
IN
V = 12 V
IN
V = 20 V
IN
Auto-Skip
V = 1.2 V
OUT
0.001 0.01 0.1 1 10 100
I
OUT
– Output Current – A
V
OUT
– Output Voltage – V
0.85
0.86
0.87
0.88
0.89
0.90
0.91
0.92
0.93
0.94
0.95
V
IN
= 20 V
V
IN
= 8 V
V
IN
= 12 V
V
OUT
= 0.9 V
1.15
1.16
1.17
1.18
1.19
1.20
1.21
1.22
1.23
1.24
1.25
0.001 0.01 0.1 1 10 100
I
OUT
– Output Current – A
V
OUT
= 1.2 V
V
IN
= 20 V
V
IN
= 8 V
V
IN
= 12 V
V
OUT
– Output Voltage – V
www.ti.com Performance and Typical Characteristic Curves
6 Performance and Typical Characteristic Curves
Figure 4 through Figure 18 present typical performance curves for TPS51217EVM-533.
6.1 Efficiency
Figure 4. Efficiency at 0.9-V Output Figure 5. Efficiency at 1.2-V Output
6.2 Load Regulation
Figure 6. Load Regulation at 0.9-V Output Figure 7. Load Regulation at 1.2-V Output
9
SLUU420–MAY 2010 Using the TPS51217EVM-533, High-Performance, Single-Synchronous
Step-Down Controller for Notebook Power Supply
Copyright © 2010, Texas Instruments Incorporated