TPS54260
www.ti.com
SLVSA86 –MARCH 2010
TYPICAL CHARACTERISTICS
ON RESISTANCE vs JUNCTION TEMPERATURE
VOLTAGE REFERENCE vs JUNCTION TEMPERATURE
0.816
0.808
0.800
500
375
250
VI = 12 V
VI = 12 V
BOOT-PH = 3 V
BOOT-PH = 6 V
0.792
0.784
125
0
-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
Figure 1.
Figure 2.
SWITCH CURRENT LIMIT vs JUNCTION TEMPERATURE
SWITCHING FREQUENCY vs JUNCTION TEMPERATURE
7.0
610
VI = 12 V,
VI = 12 V
RT = 200 kW
600
6.5
6.0
5.5
5.0
590
580
570
560
550
-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
Figure 3.
Figure 4.
SWITCHING FREQUENCY vs RT/CLK RESISTANCE HIGH
FREQUENCY RANGE
SWITCHING FREQUENCY vs RT/CLK RESISTANCE LOW
FREQUENCY RANGE
2500
500
VI = 12 V,
TJ = 25°C
VI = 12 V,
400
2000
1500
1000
TJ = 25°C
300
200
100
0
500
0
0
25
50
75
100
125
150
175
200
200
300 400
500
600 700
800
900 1000 1100 1200
RT/CLK - Resistance - kW
RT/CLK - Resistance - kW
Figure 5.
Figure 6.
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