TPS54418_15 Datasheet, PDF (8/40 Pages) Texas Instruments – TPS54418 2.95-V to 6-V Input, 4-A Output, 2-MHz , Synchronous Step-Down Switcher With Integrated FETs (SWIFT™)

TPS54418
SLVS946D – SEPTEMBER 2009 – REVISED DECEMBER 2014
Typical Characteristics (continued)
100
Vsense Falling
75
Vsense Rising
50
25
00
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
Vsense - V
Figure 7. Switching Frequency vs Vsense
90
85
V_IN = 3 .3 V
80
75
70
65
60
55
50
45
40
-50 -25
0
25
50
75 100 125 150
T_J - Junction Temperature - °C
Figure 9. Transconductance (Soft-Start) vs Junction
Temperature
-2.75
-2.85
-2.95
V_IN = 5 V,
Ien = Threshold +50 mV
-3.05
-3.15
-3.25
-3.35
-3.45
-3.55
-3.65
-3.75-50
-25
0
25
50
75 100 125 150
T_J - Junction Temperature - °C
Figure 11. Pin Current vs Junction Temperature
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280
V_IN = 3 .3 V
260
240
220
200
180
160
140
-50 -25
0
25
50
75 100 125 150
T_J - Junction Temperature - °C
Figure 8. Transconductance vs Junction Temperature
1.3
1.29
1.28
1.27
V_IN = 3.3 V, rising
1.26
1.25
1.24
1.23
1.22
1.21
1.2
1.19
V_IN = 3.3 V, falling
1.18
1.17
1.16
1.15
-50 -25
0
25
50
75 100 125 150
T_J - Junction Temperature - °C
Figure 10. Enable Pin Voltage vs Junction Temperature
-0.25
-0.35
-0.45
V_IN = 5 V,
Ien = Threshold -50 mV
-0.55
-0.65
-0.75
-0.85
-0.95
-1.05
-1.15
-1.25
-50 -25
0
25
50
75 100 125 150
T_J - Junction Temperature - °C
Figure 12. Pin Current vs Junction Temperature
8
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