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ꢀꢁ ꢂ ꢃꢄ ꢅꢃ ꢆ
SLVS456C − OCTOBER 2003 − REVISED OCTOBER 2004
CURRENT LIMIT
vs
POWER GOOD THRESHOLD
INTERNAL VOLTAGE REFERENCE
vs
vs
INPUT VOLTAGE
JUNCTION TEMPERATURE
JUNCTION TEMPERATURE
6.0
5.5
5.0
4.5
4.0
98.0
97.5
97.0
96.5
96.0
0.8912
0.8910
0.8908
0.8906
0.8904
0.8902
T
V
= 25°C
= 12 V
J
I
VIN = 12 V
0.8900
0.8898
5.0
7.5
10.0 12.5 15.0 17.5 20.0
−50 −25
0
25 50 75 100 125 150
−50 −25
0
25 50 75 100 125 150
V − Input Voltage − V
I
T
J
− Junction Temperature − 5C
T
J
− Junction Temperature − 5C
Figure 39
Figure 40
Figure 38
ON RESISTANCE
vs
JUNCTION TEMPERATURE
PH VOLTAGE
vs
SUPPLY CURRENT
SLOW START CAPACITANCE
vs
TIME
2
1.75
1.50
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
150
130
110
90
V
= 12 V
= 0.5 A
I
I
O
R
= 2 kΩ
SS
V
= 4.5 V
I
V
= 12 V
I
1.25
1
70
0.05
0
50
−50 −25
0
10 20 30 40 50 60 70 80
100
150
200
250
300
0
25 50 75 100 125 150
t − Time − ms
I
− Supply Current − mA
T
J
− Junction Temperature − 5C
CC
Figure 41
Figure 42
Figure 43
POWER GOOD DELAY
vs
HICCUP TIME
vs
INTERNAL SLOW START TIME
vs
SWITCHING FREQUENCY
SWITCHING FREQUENCY
SWITCHING FREQUENCY
5
4.5
4
10
9
4.5
4
3.5
3
8
7
3.5
2.5
2
6
3
2.5
2
5
1.5
1
4
3
2
1.5
1
0.5
0
250
350
450
550
650
750
250
350
450
550
650
750
250
350
450
550
650
750
Switching Frequency − kHz
Switching Frequency − kHz
Switching Frequency − kHz
Figure 44
Figure 45
Figure 46
23
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