LT3474/LT3474-1
TYPICAL PERFORMANCE CHARACTERISTICS
Boost Pin Current
Quiescent Current
Reference Voltage
1.260
1.255
1.250
1.245
1.240
1.235
3.0
2.5
2.0
1.5
1.0
0.5
0
60
50
40
30
20
10
0
T
= 25°C
T
= 25°C
A
A
0
12
18
(V)
24
30
36
–50 –25
0
25
50
75
125
0
500
750 1000 1250 1500
6
100
250
V
SWITCH CURRENT (mA)
TEMPERATURE (°C)
IN
3474 G13
3474 G14
3473 G12
Open-Circuit Output Voltage and
Input Current
Schottky Reverse Leakage
Schottky Forward Voltage Drop
500
400
300
200
100
0
20
15
10
5
60
50
8
V
= 5V
T
A
= 25°C
T
= 25°C
R
A
INPUT CURRENT
LT3474-1
7
6
5
4
3
2
1
40
30
20
10
LT3474
LT3474-1
LT3474
OUTPUT VOLTAGE
0
0
0
–50 –25
0
25
50
75 100 125
0
200
400
600
800
1000
0
10
20
(V)
30
40
TEMPERATURE (°C)
V
FORWARD VOLTAGE (mV)
IN
3474 G15
3474 G19
3474 G16
Minimum Input Voltage,
Minimum Input Voltage,
One White Luxeon III Star
Two Series Connected White
Luxeon III Stars
6
5
10
9
T
A
= 25°C
T = 25°C
A
TO START
TO RUN
4
3
8
LED VOLTAGE
TO START
TO RUN
7
LED VOLTAGE
2
1
0
6
5
0
200
400
600
800
1000
0
200
400
600
800
1000
LED CURRENT (mA)
LED CURRENT (mA)
3474 G17
3474 G18
3474fd
5
Linear [ Linear ]
