LT3498
TYPICAL PERFORMANCE CHARACTERISTICS
T = 25°C, unless otherwise specified.
A
LED Switching Frequency
vs Temperature
OLED Switch Saturation
Voltage (V
OLED Schottky Forward
Voltage Drop
)
CESAT2
300
250
200
150
100
50
2.6
400
350
300
250
T = 125°C
2.5
2.4
T = 125°C
T = –50°C
T = 25°C
2.3
2.2
2.1
2.0
1.9
200
150
T = 25°C
100
50
0
T = –50°C
0
1.8
0
100
150
200
250
300
50
–25
0
50
75 100 125
200
400
800
–50
25
0
1000 1200
600
SWITCH CURRENT (mA)
TEMPERATURE (°C)
SCHOTTKY FORWARD DROP (mV)
3498 G12
3498 G11
3498 G10
V
vs V
OUT2
V
vs Temperature
= 16V)
OUT2
CTRL2
OUT2
OUT2
(V
= 16V)
(V
V
Load Regulation
OUT2
6
3
18
16
14
12
10
8
2.0
1.5
1.0
0.5
0
0
–0.5
6
–3
–1.0
–1.5
–2.0
4
2
–6
0
–50 –25
0
25
50
75 100 125
0
2000
10
20
LOAD CURRENT (mA)
40
500
1000
1500
0
50
30
TEMPERATURE (°C)
CTRL2 VOLTAGE (V)
3498 G13
3498 G14
3498 G15
OLED Minimum
OLED Switching Frequency
vs Load Current
Switching Frequency
Peak Inductor Current
1200
1000
800
600
400
200
0
80
600
70
60
550
500
50
40
30
20
10
450
400
350
300
250
0
200
0.1
1
10
100
–25
0
50
75 100 125
–50
25
–25
0
50
75 100 125
–50
25
LOAD CURRENT (mA)
TEMPERATURE (°C)
TEMPERATURE (°C)
3498 G17
3498 G16
3498 G18
3498f
5
Linear [ Linear ]
