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