Datasheet

−50 −25 50 100 1250
115
150
140
100
25 75
135
125
110
105
120
145
130
I
ILIM
− Current Limit Sink Current − µA
T
J
− Junction Temperature − °C
VDD
28 V
12 V
4.5 V
V
ILIM(offst)
– Current Limit Offset Voltage Drop – mV
T
J
– Junction Temperature – °C
−50 −25 50 100 1250
−40
0
−10
−60
25 75
−20
−30
−50
Average
+3 S
−3 S
f
SW
− Switching Frequency − kHz
V
VDD
− Input Voltage − V
4 8 16 24 2812 20
500
490
497
491
493
498
496
494
499
495
492
R
RT
= 90.1kΩ
−50 −25 50 100 1250
699
704
697
25 75
702
698
700
703
701
V
FB
− Feedback Voltage − V
T
J
− Junction Temperature − °C
VDD
28 V
4.5 V
12 V
TPS40077
www.ti.com ..................................................................................................................................................... SLUS714D – JANUARY 2007 – REVISED APRIL 2009
TYPICAL CHARACTERISTICS (continued)
CURRENT LIMIT OFFSET VOLTAGE CURRENT LIMIT SINK CURRENT
vs vs
JUNCTION TEMPERATURE JUNCTION TEMPERATURE
Figure 5. Figure 6.
FEEDBACK REGULATION VOLTAGE SWITCHING FREQUENCY
vs vs
JUNCTION TEMPERATURE INPUT VOLTAGE
Figure 7. Figure 8.
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