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LTC4449 Datasheet(PDF) 5 Page - Linear Technology

No. de pieza LTC4449
Descripción Electrónicos  Dual, Multiphase Current Mode Synchronous Controller for Sub-Milliohm DCR Sensing
PDF  38 Pages
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Fabricante Electrónico  LINER [Linear Technology]
Página de inicio  http://www.linear.com
Logo LINER - Linear Technology

LTC4449 Datasheet(HTML) 5 Page - Linear Technology

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LTC3774
5
3774fc
For more information www.linear.com/LTC3774
TYPICAL PERFORMANCE CHARACTERISTICS
Input Quiescent Current
vs Input Voltage
Shutdown Current
vs Input Voltage
INTVCC Line Regulation
Oscillator Frequency
vs Input Voltage
Maximum Current Sense Threshold
vs Common Mode Voltage
Maximum Current Sense
Threshold vs Feedback Voltage
(Current Foldback)
Current Sense Threshold
vs ITH Voltage
COMMON MODE VOLTAGE (V)
0
20
25
30
1.5
2
2.5
3
3774 G01
15
10
0.5
1
3.5
5
0
35
INTVCC
3/4 INTVCC
1/2 INTVCC
1/4 INTVCC
0
FEEDBACK VOLTAGE (V)
0
20
25
30
0.2
0.3
0.4
0.5
3774 G02
15
10
0.1
0.6
5
0
35
ILIM = 0
ILIM = 1/4 INTVCC
ILIM = 1/2 INTVCC
ILIM = 3/4 INTVCC
ILIM = INTVCC
V(ITH) (V)
0
20
25
30
0.75 1
1.5
1.25
1.75
3774 G03
15
10
5
0
0.25 0.5
2
–5
–10
35
ILIM = 0
ILIM = 1/4 INTVCC
ILIM = 1/2 INTVCC
ILIM = 3/4 INTVCC
ILIM = INTVCC
INPUT VOLTAGE (V)
0
15
20
30
25
35
3774 G04
10
8
6
4
5
10
40
2
0
12
INPUT VOLTAGE (V)
0
15
20
30
25
35
3774 G05
50
40
30
20
5
10
40
10
0
60
INPUT VOLTAGE (V)
0
15
20
30
25
35
3774 G06
5
4
3
2
5
10
40
1
0
6
INPUT VOLTAGE (V)
0
15
20
30
25
35
3774 G07
1000
800
600
400
5
10
40
200
0
1200
23.2k
47.5k
75k
Load Step (Continuous
Conduction Mode)
50µs/DIV
3774 G08
VOUT = 1.5V
50mV/DIV
AC-COUPLED
ILOAD
5A-DIV
15A TO 30A
VIN = 12V



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