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LTC3875 Datasheet(PDF) 7 Page - Linear Technology

Part # LTC3875
Description  Dual, 2-Phase, Synchronous Controller with Low Value DCR Sensing and Temperature Compensation
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3875 Datasheet(HTML) 7 Page - Linear Technology

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LTC3875
7
3875fb
For more information www.linear.com/LTC3875
TYPICAL PERFORMANCE CHARACTERISTICS
Maximum Current Sense
Threshold vs Feedback Voltage
(Current Foldback)
TK/SS Pull-Up Current
vs Temperature
Shutdown (RUN) Threshold
vs Temperature
Regulated Feedback Voltage
vs Temperature
Oscillator Frequency
vs Temperature
INTVCC Line Regulation
Current Sense Threshold
vs ITH Voltage
Maximum Current Sense Threshold
vs Common Mode Voltage
INPUT VOLTAGE (V)
0
0
1
2
3
4
10
20
30
40
3875 G10
5
6
5
15
25
35
ITH VOLTAGE (V)
0
–10
–5
5
10
15
40
25
0.5
1
3875 G11
0
30
35
20
1.5
2
ILIM = 0
ILIM = 1/4 INTVCC
ILIM = 1/2 INTVCC
ILIM = 3/4 INTVCC
ILIM = INTVCC
VSENSE COMMON MODE VOLTAGE (V)
0
20
25
35
3
3875 G12
15
10
1
2
4
5
0
30
ILIM = INTVCC
ILIM = 3/4 INTVCC
ILIM = 1/2 INTVCC
ILIM = 1/4 INTVCC
ILIM = GND
FEEDBACK VOLTAGE (V)
0
35
30
25
20
15
10
5
0
0.3
0.5
3875 G13
0.1
0.2
0.4
0.6
ILIM = INTVCC
ILIM = 3/4 INTVCC
ILIM = 1/2 INTVCC
ILIM = 1/4 INTVCC
ILIM = GND
TEMPERATURE (°C)
–50
1.20
1.25
1.30
110
3875 G14
1.15
1.10
1.00
–10
30
70
–30
130
10
50
90
1.05
1.40
1.35
TEMPERATURE (°C)
–50
1.00
1.05
1.10
1.15
1.20
1.25
1.30
0
50
ON
OFF
100
150
4320 G01
TEMPERATURE (°C)
–50 –30 –10
0.5955
0.5965
0.5985
0.5995
0.6005
70 90 110
0.6045
3875 G16
0.5975
10 30 50
130
0.6015
0.6025
0.6035
TEMPERATURE (°C)
–50
500
600
700
150
3875 G17
400
300
200
0
0
50
100
100
900
VFREQ = INTVCC
VFREQ = 1.22V
VFREQ = GND
800


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