LT3498
TYPICAL PERFORMANCE CHARACTERISTICS
Shutdown Current
(V
CTRL1
= V
CTRL2
= 0V)
15
SWITCH SATURATION VOLTAGE (mV)
T = –50°C
500
T = –50°C
SCHOTTKY FORWARD CURRENT (mA)
450
400
350
300
250
200
150
100
50
0
0
2
4
6
V
IN
(V)
8
10
12
1635 G07
T
A
= 25°C, unless otherwise specified.
LED Schottky Forward
Voltage Drop
400
350
T = 125°C
300
250
200
150
100
50
0
0
200
400
T = –50°C
T = 25°C
LED Switch Saturation
Voltage (V
CESAT1
)
SHUTDOWN CURRENT (µA)
12
9
T = 125°C
6
T = 25°C
T = 25°C
T = 125°C
3
0
0
50
100 150 200 250 300 350 400
SWITCH CURRENT (mA)
3498 G02
800
600
SCHOTTKY FORWARD DROP (mV)
1000
3498 G03
Sense Voltage (V
CAP1
– V
LED1
)
vs V
CTRL1
240
200
SENSE VOLTAGE (mV)
160
120
80
40
0
0
500
1000
V
CTRL1
(mV)
1500
2000
3498 G04
Sense Voltage (V
CAP1
– V
LED1
)
vs Temperature
206
206
Sense Voltage (V
CAP1
– V
LED1
)
vs V
CAP1
T = 25°C
T = –50°C
T = 125°C
SENSE VOLTAGE (mV)
202
SENSE VOLTAGE (mV)
202
198
198
T = 125°C
T = 25°C
194
194
T = –50°C
190
190
186
–50 –25
50
25
0
75
TEMPERATURE (°C)
100
125
186
0
5
15
10
CAP1 VOLTAGE (V)
20
25
3498 G06
3498 G05
LED Current Limit
vs Temperature
500
29
Open Circuit Output
Clamp Voltage
6
5
T = –50°C
T = 25°C
27
T = 150°C
INPUT CURRENT (mA)
28
4
3
Input Current in Output
Open Circuit
CURRENT LIMIT (mA)
450
OUTPUT CLAMP VOLTAGE (V)
T = 150°C
T = 25°C
T = –50°C
400
2
1
350
26
300
–50
–25
50
25
0
75
TEMPERATURE (°C)
100
125
25
0
0
2
4
6
V
IN
(V)
8
10
12
3498 G08
2
4
6
V
IN
(V)
8
10
12
3498 G09
3498 G07
3498f
4
LINER [ LINEAR TECHNOLOGY ]
