LT3957AIUHE データシートの表示（PDF） - Linear Technology
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LT3957AIUHE Datasheet PDF : 28 Pages
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LT3957A
TYPICAL PERFORMANCE CHARACTERISTICS TA ≈ TJ = 25°C, unless otherwise noted.
Dynamic Quiescent Current
vs Switching Frequency
12
10
8
6
4
2
0
100 200 300 400 500 600 700 800 900 1000
SWITCHING FREQUENCY (kHz)
3957A G04
Switching Frequency
vs Temperature
325
RT = 41.2k
320
315
310
305
300
295
290
285
280
275
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3957A G07
EN/UVLO Threshold
vs Temperature
1.28
RT vs Switching Frequency
1000
100
10
0 100 200 300 400 500 600 700 800 900 1000
SWITCHING FREQUENCY (kHz)
3957A G05
SW Pin Current Limit
vs Temperature
6.6
6.4
6.2
6.0
5.8
5.6
5.4
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3957A G08
EN/UVLO Current vs Voltage
40
1.26
30
EN/UVLO RISING
1.24
20
1.22
EN/UVLO FALLING
10
1.20
1.18
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3957A G10
0
0
10
20
30
40
EN/UVLO VOLTAGE (V)
3957A G11
Normalized Switching
Frequency vs FBX
120
100
80
60
40
20
0
–0.8 –0.4
0 0.4 0.8
FBX VOLTAGE (V)
1.2 1.6
3957A G06
SW Pin Current Limit
vs Duty Cycle
6.6
6.4
6.2
6.0
5.8
5.6
5.4
0
20
40
60
DUTY CYCLE (%)
80 100
3957A G09
EN/UVLO Hysteresis Current
vs Temperature
2.4
2.2
2.0
1.8
1.6
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3957A G12
3957afa
5
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