LT3518
TYPICAL PERFORMANCE CHARACTERISTICS
Switch Current Limit
vs Duty Cycle
VISP – VISN Threshold vs VCTRL
3.0
2.5
120
100
80
60
40
20
0
V
V
V
= 5V
IN
= 24V
ISP
= 1V
C
A
T
= 25°C
2.0
1.5
1.0
0.5
0
T
= 25°C
A
1.0 1.2
(V)
0
0.2 0.4 0.6 0.8
1.4 1.6
0
20
40
60
80
100
V
DUTY CYCLE (%)
CTRL
3518 G01
3518 G02
VISP – VISN Threshold vs
Temperature
Oscillator Frequency vs RT
10000
1000
100
105
104
103
102
101
100
99
T
= 25°C
V
V
= 2V
A
CTRL
IN
= 5V
T
= 25°C
= 1V
A
V
C
98
97
96
95
1
10
100
0
10
20
V
ISP
30
(V)
40
50
R
(kΩ)
T
3518 G03
3518 G04
Switch Current Limit vs
Temperature
Oscillator Frequency vs
Temperature
3.0
2.8
2.6
2.4
2.2
2.0
2.5
2.3
2.1
1.9
1.7
1.5
V
= 5V
V
= 5V
= 6.04k
IN
IN
T
R
–40 –15 –10 35 60 85 110 135 160
–40 –20
0
20 40 60 80 100 120 140 160
TEMPERATURE (°C)
TEMPERATURE (°C)
3518 G05
3518 G06
3518fb
5
Linear [ Linear ]
