TPS54331-Q1
SLVSAB5 –NOVEMBER 2010
www.ti.com
TYPICAL CHARACTERISTICS
CHARACTERIZATION CURVES
ON RESISTANCE
SHUTDOWN QUIESCENT CURRENT
SWITCHING FREQUENCY
vs
JUNCTION TEMPERATURE
110
vs
vs
INPUT VOLTAGE
JUNCTION TEMPERATURE
4
590
585
VIN = 12 V
VIN = 12 V
105
EN = 0 V
100
95
TJ = 150°C
3
2
580
575
570
90
85
80
75
TJ = 25°C
TJ = -40°C
565
560
1
0
70
65
60
555
550
-50
-25
0
25
50
75
100
125
150
-50
-25
0
25
50
75
100
125
150
3
8
13
18
23
28
TJ - Junction Temperature - °C
VI - Input Voltage - V
TJ - Junction Temperature - °C
Figure 1.
Figure 2.
Figure 3.
MINIMUM CONTROLLABLE ON
TIME
MINIMUM CONTROLLABLE DUTY
RATIO
VOLTAGE REFERENCE
vs
vs
vs
JUNCTION TEMPERATURE
JUNCTION TEMPERATURE
JUNCTION TEMPERATURE
7.50
7.25
0.8240
0.8180
140
130
VIN = 12 V
VIN = 12 V
0.8120
7
6.75
6.50
6.25
6
0.8060
0.8000
120
110
100
0.7940
0.7880
0.7820
0.7760
5.75
5.50
-50
-25
0
25
50
75
100
125
150
-50
-25
0
25
50
75
100
125
150
-50
-25
0
25
50
75
100
125
150
TJ - Junction Temperature - °C
TJ - Junction Temperature - °C
TJ - Junction Temperature - °C
Figure 4.
Figure 5.
Figure 6.
SS CHARGE CURRENT
vs
CURRENT LIMIT THRESHOLD
vs
JUNCTION TEMPERATURE
INPUT VOLTAGE
6
2.10
TJ = 150°C
TJ = 25°C
5
TJ = -40°C
2
4
3
1.90
-50
-25
0
25
50
75
100
125
150
3
8
13
18
23
28
VI - Input Voltage - V
TJ - Junction Temperature - °C
Figure 7.
Figure 8.
6
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