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LTC3855EFEPBF Datasheet(PDF) 7 Page - Linear Technology

Part # LTC3855EFEPBF
Description  Dual, Multiphase Synchronous DC/DC Controller with Differential Remote Sense
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3855EFEPBF Datasheet(HTML) 7 Page - Linear Technology

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LTC3855

3855f
VITH (V)
0
–40
–20
0
20
40
60
80
0.5
1
1.5
2
3855 G10
ILIM = GND
ILIM = FLOAT
ILIM = INTVCC
VSENSE COMMON MODE VOLTAGE (V)
0
30
40
50
12
20
10
0
2
6
8
10
4
60
70
80
3855 G11
ILIM = GND
ILIM = FLOAT
ILIM = INTVCC
60
80
40
20
50
70
30
10
0
DUTY CYCLE (%)
0
60
100
20
40
80
3855 G12
ILIM = GND
ILIM = FLOAT
ILIM = INTVCC
Typical perForMance characTerisTics
Current Sense Threshold
vs ITH Voltage
Maximum Current Sense
Threshold vs Common Mode
Voltage
Maximum Current Sense
Threshold vs Duty Cycle
Maximum Current Sense Voltage
vs Feedback Voltage (Current
Foldback)
TK/SS Pull-Up Current
vs Temperature
Tracking Up and Down
with External Ramp
Quiescent Current
vs Temperature without EXTVCC
INTVCC Line Regulation
VIN = 12V
VOUT1 = 1.8V, 1.5 LOAD
VOUT2 = 1.2V, 1 LOAD
10ms/DIV
3855 G07
TK/SS1
TK/SS2
2V/DIV
VOUT1
VOUT2
500mA/DIV
VOUT1
VOUT2
4.5
4.0
3.0
2.0
1.0
3.5
2.5
1.5
0.5
0
TEMPERATURE (°C)
–50
50
0
100
3855 G08
125
25
–25
75
5.5
5.0
4.5
4.0
3.0
3.5
2.5
2.0
INPUT VOLTAGE (V)
0
10
30
3855 G09
40
20
FEEDBACK VOLTAGE (V)
0
30
40
50
0.6
20
10
0
0.1
0.3
0.4
0.5
0.2
60
70
90
80
3855 G13
ILIM = GND
ILIM = FLOAT
ILIM = INTVCC
1.6
1.2
1.4
1.0
TEMPERATURE (°C)
–50
50
0
100
3855 G14
125
25
–25
75


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