LT3759H(RevB) Ver la hoja de datos (PDF) - Linear Technology
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LT3759H Datasheet PDF : 32 Pages
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LT3759
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.
FBX Positive Regulation Voltage
vs Temperature
1.62
FBX Negative Regulation Voltage
vs Temperature
–0.78
1.61
–0.79
1.60
–0.80
1.59
–0.81
1.58
–75 –50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3759 G01
–0.82
–75 –50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3759 G02
Dynamic Quiescent Current
vs Switching Frequency
25
CL = 3300pF, DRIVE = 6V
20
15
IQ (DRIVE)
10
5
IQ (VIN)
0
0
200 400 600 800 1000
SWITCHING FREQUENCY (kHz)
3759 G04
RT vs Switching Frequency
100
90
80
70
60
50
40
30
20
10
0
0 100 200 300 400 500 600 700 800 900 1000
SWITCHING FREQUENCY (kHz)
3759 G05
Switching Frequency
vs Temperature
350
RT = 27.4k
325
SENSE Current Limit Threshold
vs Temperature
53
52
51
300
50
49
275
48
250
–75 –50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3759 G07
47
–75 –50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3759 G08
Quiescent Current
vs Temperature
2.2
2.0
IQ (DRIVE)
1.8
1.6
1.4
1.2
VIN = 12V
DRIVE = 6V
1.0
0.8
0.6
0.4
IQ (VIN)
0.2
0
–75 –50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3759 G03
Normalized Switching Frequency
vs FBX Voltage
120
100
80
60
40
20
0
–0.8 –0.4
0 0.4 0.8
FBX VOLTAGE (V)
1.2 1.6
3759 G06
SENSE Current Limit Threshold
vs Duty Cycle
53
52
51
50
49
48
47
0
20
40
60
80
100
DUTY CYCLE (%)
3759 G09
3759fb
5
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