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LT8705 Datasheet(PDF) 7 Page - Linear Technology

Part # LT8705
Description  60V PolyPhase Synchronous Boost Controller
PDF  38 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT8705 Datasheet(HTML) 7 Page - Linear Technology

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LTC3784
7
3784fb
For more information www.linear.com/LTC3784
SENSE Pin Input Current
vs Temperature
Oscillator Frequency
vs Temperature
Maximum Current Sense
Threshold vs ITH Voltage
SENSE Pin Input Current
vs VSENSE Voltage
SENSE Pin Input Current
vs ITH Voltage
Oscillator Frequency
vs Input Voltage
Maximum Current Sense
Threshold vs Duty Cycle
Charge Pump Charging Current
vs Operating Frequency
Charge Pump Charging Current
vs Switch Voltage
TEMPERATURE (°C)
300
350
600
450
500
550
400
3784 G19
–60
15
–35 –10
40 65 90
140
115
FREQ = INTVCC
FREQ = GND
15
5 10
20 25 30 35 40 45 50 55 60 65
INPUT VOLTAGE (V)
344
354
356
358
360
350
342
352
340
348
346
3784 G20
FREQ = GND
ITH VOLTAGE (V)
0
80
120
100
0.6
1.0
3784 G21
40
0
0.2
0.4
0.8
1.2
1.4
–40
60
20
–20
–60
ILIM = GND
ILIM = FLOAT
ILIM = INTVCC
Burst Mode
OPERATION
PULSE-SKIPPING MODE
FORCED CONTINUOUS MODE
TEMPERATURE (°C)
0
80
40
160
200
240
120
20
100
60
180
220
260
140
3784 G22
–60
15
–35 –10
40 65 90
140
115
SENSE– PIN
SENSE+ PIN
VSENSE = 12V
ILIM = FLOAT
ITH VOLTAGE (V)
0
1
2
2.5
0
80
40
160
200
240
120
20
100
60
180
220
260
140
0.5
1.5
3
3784 G23
SENSE+ PIN
SENSE– PIN
VSENSE = 12V
ILIM = INTVCC
ILIM = FLOAT
ILIM = GND
ILIM = INTVCC
ILIM = FLOAT
ILIM = GND
DUTY CYCLE (%)
0
80
100
70
60
40
20
40
10
90
30
50
80
60
100
20
0
120
3784 G25
ILIM = INTVCC
ILIM = FLOAT
ILIM = GND
OPERATING FREQUENCY (kHz)
50
0
20
30
80
50
250
450 550
10
60
70
40
150
350
650 750
3784 G26
T = 130°C
T = 155°C
T = 25°C
T = –45°C
T = –60°C
VSENSE COMMON MODE VOLTAGE (V)
200
3784 G24
0
180
160
140
260
240
220
120
100
80
60
40
20
5 10
45 50 55
30 35 40
15 20 25
60 65
SENSE+ PIN
ILIM = INTVCC
ILIM = FLOAT
ILIM = GND
ILIM = INTVCC
ILIM = FLOAT
ILIM = GND
SENSE– PIN
SWITCH VOLTAGE (V)
3784 G27
0
50
40
70
60
30
20
10
5
45
55
35
15
25
65
FREQ = GND
FREQ = INTVCC
Typical perForMance characTerisTics T
A = 25°C unless otherwise noted.



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