Datasheet

LT3758/LT3758A
5
3758afd
TEMPERATURE (°C)
–75 –50
1580
1585
REGULATED FEEDBACK VOLTAGE (V)
1590
1605
1600
0 50 75
1595
–25 25 100 150125
3758 G01
V
IN
= 100V
V
IN
= 24V
V
IN
= 8V
V
IN
= INTV
CC
= 5.5V
SHDN/UVLO = 1.33V
TEMPERATURE (°C)
REGULATED FEEDBACK VOLTAGE (mV)
–802
–800
–798
–790
–792
–794
–804
–796
3758 G02
–75 –50 0 50 75–25 25 100 150125
V
IN
= 100V
V
IN
= 24V
V
IN
= 8V
V
IN
= INTV
CC
= 5.5V
SHDN/UVLO = 1.33V
typicAl perForMAnce chArActeristics
Positive Feedback Voltage
vs Temperature, V
IN
Negative Feedback Voltage
vs Temperature, V
IN
Quiescent Current
vs Temperature, V
IN
T
A
= 25°C, unless otherwise noted.
–75 –50 0 50 75–25 25 100 150125
TEMPERATURE (°C)
1.5
QUIESCENT CURRENT (mA)
1.6
1.9
1.8
1.7
3758 G03
V
IN
= 100V
V
IN
= 24V
V
IN
= INTV
CC
= 5.5V
Dynamic Quiescent Current
vs Switching Frequency
R
T
vs Switching Frequency
Normalized Switching
Frequency vs FBX
FBX VOLTAGE (V)
–0.8
0
NORMALIZED FREQUENCY (%)
20
40
60
80
120
–0.4
0 0.4 0.8
3758 G06
1.2 1.6
100
SWITCHING FREQUENCY (kHz)
0
0
I
Q
(mA)
15
20
35
300
500 600
700
10
5
25
30
100 200
400
900800
1000
3758 G04
C
GATE
= 3300pF
SWITCHING FREQUENCY (kHz)
0
10
R
T
(kΩ)
100
1000
300
500 600
700
100 200
400
900800
1000
3758 G05
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