Datasheet


SLVS456C − OCTOBER 2003 − REVISED OCTOBER 2004
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22
Figure 29
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
5 6 7 8 9 1011121314151617181920
700 kHz
600 kHz
500 kHz
400 kHz
300 kHz
200 kHz
I
O
> 0.5 A
MINIMUM OUTPUT VOLTAGE
vs
INPUT VOLTAGE
Minimum Output Voltage − V
V
I
− Input Voltage − V
Figure 30
0
100
200
300
400
500
600
700
800
56789
10 11 12 13 14 15 16 17 18 19 20
I
O
> 0.5 A
MAXIMUM SWITCHING FREQUENCY
vs
INPUT VOLTAGE
Maximum Switching Frequency − kHz
V
I
− Input Voltage − V
V
O
= 3.3 V
V
O
= 2.5 V
V
O
= 1.8 V
V
O
= 1.5 V
V
O
= 0.9 V
V
O
= 1.2 V
Figure 31
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
5 6 7 8 9 1011121314151617181920
700 kHz
600 kHz
500 kHz
400 kHz
300 kHz
200 kHz
I
O
= 0 A
MINIMUM OUTPUT VOLTAGE
vs
INPUT VOLTAGE
Minimum Output Voltage − V
V
I
− Input Voltage − V
Figure 32
0
100
200
300
400
500
600
700
800
567891011121314151617181920
I
O
< 0.1 A
MAXIMUM SWITCHING FREQUENCY
vs
INPUT VOLTAGE
Maximum Switching Frequency − kHz
V
I
− Input Voltage − V
V
O
= 3.3 V
V
O
= 2.5 V
V
O
= 0.9 V
V
O
= 1.8 V
V
O
= 1.5 V
V
O
= 1.2 V
Figure 33
50
75
100
125
150
175
200
225
200 300 400 500 600 700
RT RESISTANCE
vs
SWITCHING FREQUENCY
RT Resistance − kW
Switching Frequency − kHz
Figure 34
3.5
3.7
3.9
4.1
4.3
4.5
−50 −25 0 25 50 75 100 125 150
VIN(UVLO) START AND STOP
vs
FREE-AIR TEMPERATURE
V
I
− Input Voltage − V
T
A
− Free-Air Temperature − 5C
T
J
= 25°C
Start
Stop
Figure 35
3
4
5
6
7
8
9
10
0 5 10 15 20 25
ENABLED SUPPLY CURRENT
vs
INPUT VOLTAGE
Enabled Supply Current − mA
V
I
− Input Voltage − V
T
J
= 25°C
f
S
= 500 kHz
Figure 36
0.9
1.0
1.1
1.2
1.3
0 5 10 15 20 25
DISABLED SUPPLY CURRENT
vs
INPUT VOLTAGE
Disabled Supply Current − mA
V
I
− Input Voltage − V
T
J
= 25°C
Figure 37
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
0 5 10 15 20 25
BIAS VOLTAGE
vs
INPUT VOLTAGE
V
BIAS
− Bias Voltage − V
V
I
− Input Voltage − V
T
J
= 25°C