Datasheet

EA - Transconductance - A/Vm
170
190
210
230
250
270
290
310
-50 -25 0 25 50 75 100 125 150
T - Junction Temperature - °C
J
V = 5 V
IN
V = 3.3 V
IN
5
5.5
6
6.5
7
-50 -25 0 25 50 75 100 125 150
T - Junction Temperature - °C
J
V = 5 V
IN
V = 3.3 V
IN
HSFET Lim-High Side Fet Current Limit Current - A
f - Switching Frequency - kHz
s
0
200
400
600
800
1000
1200
1400
1600
1800
2000
RT - Resistance - kW
10 30 50 70 90 110 130 150
-50 -25 0 25 50 75 100 125 150
T - Junction Temperature - °C
J
f - Switching Frequency - kHz
s
475
480
485
490
495
500
RT = 84 k ,
Vin = 5 V
W
SS Threshold Voltage - V
0.15
0.151
0.152
0.153
0.154
0.155
0.156
0.157
0.158
0.159
0.16
-50 -25 0 25 50 75 100 125 150
T - Junction Temperature - °C
J
V = 5 V
IN
V = 3.3 V
IN
-50
-49
-48
-47
-46
-45
-44
-43
-42
-41
-40
Vin = 3.3 V, Vss < 0.15 V
Vin = 5 V, Vss < 0.15 V
-50 -25 0 25 50 75 100 125 150
T - Junction Temperature - °C
J
I 1 - SS Charge Current - A
SS
m
TPS54478
SLVSAS2 – JUNE 2011 www.ti.com
TYPICAL CHARACTERISTICS CURVES (continued)
HIGH SIDE FET CURRENT LIMIT vs
TRANSCONDUCTANCE vs TEMPERATURE TEMPERATURE
Figure 7. Figure 8.
SWITCHING FREQUENCY vs RT RESISTANCE SWITCHING FREQUENCY vs TEMPERATURE
Figure 9. Figure 10.
VSS VOLTAGE THRESHOLD V
SSTHR
vs TEMPERATURE SS CHARGE CURRENT vs TEMPERATURE
Figure 11. Figure 12.
8 Copyright © 2011, Texas Instruments Incorporated