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