Datasheet

LT3517
5
3517fg
For more information www.linear.com/LT3517
V
ISP
– V
ISN
Threshold
vs Temperature
Switch Current Limit
vs Temperature
Oscillator Frequency
vs Temperature
Reference Voltage
vs Temperature
Quiescent Current vs V
IN
TEMPERATURE (°C)
–40
V
ISP
– V
ISN
THRESHOLD (mV)
103
20
3517 G04
100
98
–20 0 40
97
96
104
102
101
99
60 80 100 120 140 160
V
IN
= 5V
V
ISP
= 24V
VC = 1V
V
CTRL
= 2V
TEMPERATURE (°C)
–40 –20
1.5
OSCILLATOR FREQUENCY (MHz)
1.9
2.5
0
40
60
3517 G06
1.7
2.3
2.1
20
80
160100 120 140
V
IN
= 5V
R
T
= 6.04k
V
ISP
(V)
0
V
ISP
– V
ISN
THRESHOLD (mV)
101
103
105
40
3517 G07
99
97
100
102
104
98
96
95
10
20
30
50
V
CTRL
= 2V
V
IN
= 5V
T
A
= 25°C
VC = 1V
TEMPERATURE (°C)
–40
1.98
V
REF
(V)
1.99
2.00
2.01
2.02
–20 0 20 40
3517 G08
60 80 100 120 140 160
V
IN
= 5V
V
IN
(V)
0
V
IN
CURRENT (mA)
4
5
6
40
3517 G09
3
2
0
10
20
30
1
8
7
T
A
= 25°C
VC = 0V
V
ISP
– V
ISN
Threshold vs V
ISP
TYPICAL PERFORMANCE CHARACTERISTICS
FB Pin Threshold vs Temperature
PMOS Turn-On PMOS Turn-Off
TEMPERATURE (°C)
–40
0.98
FB PIN THRESHOLD (V)
1.00
0.99
1.01
1.03
1.02
1.04
–20 0 20 40
3517 G10
60 80 140 160100 120
V
IN
= 5V
5V
PWM
0V
40V
TG
30V
200ns/DIVV
ISP
= 40V
3517 G11
5V
PWM
0V
40V
TG
30V
200ns/DIVV
ISP
= 40V
3517 G11
TEMPERATURE (°C)
–40 –20
0
SWITCH CURRENT LIMIT (A)
1.0
2.5
0
40
60
3518 G05
0.5
2.0
1.5
20
80 100 120 140 160
V
IN
= 5V