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