LT3798EMSE Просмотр технического описания (PDF) - Linear Technology
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LT3798EMSE Datasheet PDF : 20 Pages
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LT3798
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.
EN/UVLO Threshold
vs Temperature
1.3
1.28
RISING
1.26
1.24
FALLING
1.22
1.2
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3798 G01
EN/UVLO Hysteresis Current
vs Temperature
12
11.5
11
10.5
10
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3798 G02
VIN IQ vs Temperature
100
90
VIN = 24V
80
70
VIN = 12V
60
50
40
30
20
10
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3798 G03
VREF vs Temperature
2.100
2.075
2.050
2.025
2.000
VIN = 24V WITH NO LOAD
1.975
1.950
VIN = 24V WITH 200µA LOAD
1.925
1.900
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3798 G05
VREF vs VIN
2.05
2.04
2.03
2.02
2.01
NO LOAD
2
1.99
200µA LOAD
1.98
1.97
1.96
1.95
10 15 20 25 30
VIN (V)
35 40
3798 G05
SENSE Current Limit Threshold
vs Temperature
120
MAX ILIM
100
80
60
40
20
0
–50 –25
MIN ILIM VIN_SENSE = 34µA
MIN ILIM VIN_SENSE = 21µA
0 25 50 75 100 125 150
TEMPERATURE (°C)
3798 G06
Maximum Oscillator Frequency
vs Temperature
220
195
170
145
120
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3798 G06a
Minimum Oscillator Frequency
vs Temperature
5
4
VFB < VOVP
3
2
1
VOVP > VFB
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3799 G07
Backup Oscillator Frequency
vs Temperature
25
20
15
10
5
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3798 G07a
3798fa
4
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