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270
310
350
290
330
-50 -25 0 25 50
75
100 125
T JunctionTemperature C°
J
- -
V 5.25V
BP
=
f PWMFrequency
kHz
PWM
-
-
1.5
2.0
2.5
3.0
3.5
-50 -25 0 25 50 75 100 125
T JunctionTemperature C°
J
- -
t SoftStartTime ms
SS
- -
V 5.25V
BP
=
580
640
680
600
660
-50 -25 0 25 50 75 100 125
620
T JunctionTemperature C°
J
- -
f PWMFrequency kHz
PWM
- -
V 5.25V
BP
=
-50 -25 0 25 50 75 100 125
-3
1
-5
3
5
-1
T JunctionTemperature C°
J
- -
I
FeedbackBiasCurrent nA
FB
- -
TPS54283 , , TPS54286
SLUS749C – JULY 2007 – REVISED OCTOBER 2007
TYPICAL CHARACTERISTICS (continued)
SOFT START TIME SWITCHING FREQUENCY (300 kHz)
vs vs
JUNCTION TEMPERATURE JUNCTION TEMPERATURE
Figure 5. Figure 6.
SWITCHING FREQUENCY (600 kHz) FEEDBACK BIAS CURRENT
vs vs
JUNCTION TEMPERATURE JUNCTION TEMPERATURE
Figure 7. Figure 8.
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