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LTC4449 Datasheet(PDF) 9 Page - Analog Devices

No. de pieza LTC4449
Descripción Electrónicos  Quad-Phase, Synchronous Bidirectional Buck or Boost Controller
PDF  48 Pages
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Fabricante Electrónico  AD [Analog Devices]
Página de inicio  http://www.analog.com
Logo AD - Analog Devices

LTC4449 Datasheet(HTML) 9 Page - Analog Devices

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LTC7872
9
Rev. 0
For more information www.analog.com
TYPICAL PERFORMANCE CHARACTERISTICS
Quiescent Current vs Temperature
Shutdown Current vs Temperature
FREQ Pin Source Current
vs Temperature
SETCUR Pin Source Current
vs Temperature
Current Sense Threshold
vs ITH Voltage (DCR) as a
Function of ILIM
Maximum Current Sense
Threshold vs Feedback Voltage—
BUCK (DCR) as a Function of ILIM
Current Sense Threshold
vs ITH Voltage—(RSENSE) as
a Function of ILIM
Maximum Current Sense Threshold
vs Feedback Voltage—BUCK
(RSENSE) as a Function of ILIM
Overcurrent Fault Threshold
vs Temperature as a Function
of ILIM
TA = 25°C, unless otherwise noted.
VHIGH = 48V
TEMPERATURE (°C)
–45 –20
5
30
55
80 105 130 155
7.0
8.0
9.0
10.0
11.0
12.0
13.0
Quiescent Current vs Temperature
7872 G10
VHIGH = 48V
TEMPERATURE (°C)
–45 –20
5
30
55
80 105 130 155
20.0
30.0
40.0
50.0
60.0
Shutdown Current vs Temperature
7872 G11
TEMPERATURE (°C)
–45 –20
5
30
55
80 105 130 155
18.5
19.0
19.5
20.0
20.5
21.0
21.5
vs Temperature
7872 G12
TEMPERATURE (°C)
–45 –20
5
30
55
80 105 130 155
15.0
15.2
15.4
15.6
15.8
16.0
16.2
16.4
16.6
16.8
17.0
vs Temperature
7872 G13
GND
1/4 V5
FLOAT
3/4 V5
V5
ITH VOLTAGE (V)
0
0.5
1
1.5
2
–50
–40
–30
–20
–10
0
10
20
30
40
50
7872 G14
GND
1/4 V5
FLOAT
3/4 V5
V5
FEEDBACK VOLTAGE (V)
0
0.2
0.4
0.6
0.8
1.0
1.2
0
10
20
30
40
50
60
70
BUCK (DCR)
7872 G15
GND
1/4 V5
FLOAT
3/4 V5
V5
ITH VOLTAGE (V)
0
0.5
1
1.5
2
–70
–50
–30
–10
10
30
50
70
vs ITH Voltage (RSENSE)
7872 G16
GND
1/4 V5
FLOAT
3/4 V5
V5
FEEDBACK VOLTAGE (V)
0
0.2
0.4
0.6
0.8
1.0
1.2
0
10
20
30
40
50
60
70
80
SENSE
7872 G17
GND
1/4 V5
FLOAT
3/4 V5
V5
TEMPERATURE (°C)
–45 –20
5
30
55
80 105 130 155
0
20
40
60
80
100
Temperature
7872 G18



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