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LTC3872 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC3872
Description  Wide Input Voltage Range
Download  32 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3872 Datasheet(HTML) 5 Page - Linear Technology

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


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