TPS54531
SLVSBI5 –MAY 2013
www.ti.com
CHARACTERIZATION CURVES
ON RESISTANCE
SHUTDOWN QUIESCENT CURRENT
SWITCHING FREQUENCY
vs
vs
vs
JUNCTION TEMPERATURE
INPUT VOLTAGE
JUNCTION TEMPERATURE
120
110
100
90
4
590
EN = 0V
VIN = 12 V
3
TJ = 150°C
580
570
560
550
2
1
0
TJ = 40°C
80
70
60
TJ = 25°C
VIN = 12 V
3
8
13
18
23
28
–50
–25
0
25
50
75
100
125
150
–50
–25
0
25
50
75
100
125
150
VIN - Input Voltage - V
TJ - Junction Temperature - °C
TJ - Junction Temperature - °C
Figure 1.
Figure 2.
Figure 3.
MINIMUM CONTROLLABLE DUTY
VOLTAGE REFERENCE
vs
MINIMUM CONTROLLABLE ON TIME
RATIO
vs
vs
JUNCTION TEMPERATURE
JUNCTION TEMPERATURE
JUNCTION TEMPERATURE
7.5
7.0
0.824
0.818
140
VIN = 12 V
0.812
0.806
130
120
110
100
6.5
6.0
0.800
0.794
0.788
0.782
5.5
5.0
VIN = 12 V
VIN = 12 V
0.776
–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
JUNCTION TEMPERATURE
CURRENT LIMIT THRESHOLD
vs
INPUT VOLTAGE
12
2.1
VIN = 12 V
11
10
9
2
8
7
T
T
J = œ40°C
J = 25°C
6
T
TJ = 150°C
5
3
8
13
18
23
28
1.9
–50
–25
0
25
50
75
100
125
150
C014
Input Voltage (V)
TJ - Junction Temperature - °C
Figure 7.
Figure 8.
6
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