TPS54388-Q1 Datasheet, PDF (9/38 Pages) Texas Instruments – 2.95-V to 6-V Input, 3-A Output, 2-MHz, Synchronous Step-Down Switcher With Integrated FETs

TPS54388-Q1
www.ti.com
SLVSAF1B – OCTOBER 2010 – REVISED JULY 2012
TYPICAL CHARACTERISTICS CURVES (continued)
TRANSCONDUCTANCE vs TEMPERATURE
310
TRANSCONDUCTANCE (SLOW START) vs
JUNCTION TEMPERATURE
105
Vin = 3.3 V
290
100 ^{Vin = 3.3 V}
95
270
90
85
250
80
230
75
210
70
65
190
60
170
-50 -25
0
25
50
75 100 125 150
T_J - Junction Temperature - °C
Figure 7.
55
-50 -25
0
25
50
75
100 125 150
T_J - Junction Temperature - °C
Figure 8.
1.3
1.29
1.28
1.27
1.26
1.25
1.24
1.23
1.22
1.21
1.2
1.19
1.18
1.17
1.16
1.15
-50
EN PIN VOLTAGE vs TEMPERATURE
Vin = 3.3 V, rising
Vin = 3.3 V, falling
-25
0
25
50
75
100 125 150
T_J - Junction Temperature - °C
Figure 9.
EN PIN CURRENT vs TEMPERATURE
-3
Vin = 5 V,
-3.1 Ven = Threshold +50 mV
-3.2
-3.3
-3.4
-3.5
-3.6
-3.7
-3.8
-3.9
-4
-50 -25
0
25
50
75
100 125 150
T_J - Junction Temperature - °C
Figure 10.
EN PIN CURRENT vs TEMPERATURE
-1
Vin = 5 V,
-1.2 Ven = Threshold -50 mV
-1.4
-1.6
-1.8
-2
-2.2
-2.4
-2.6
-2.8
-3
-50 -25
0
25
50
75
100 125 150
T_J - Junction Temperature - °C
Figure 11.
CHARGE CURRENT vs TEMPERATURE
-1.4
Vin = 5 V
-1.6
-1.8
-2
-2.2
-2.4
-2.6
-2.8
-3
-50 -30 -10 10 30 50 70 90 110 130 150
T_J - Junction Temperature - °C
Figure 12.
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