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SC2441ITSTRT датащи(PDF) 10 Page - Semtech Corporation

номер детали SC2441ITSTRT
подробное описание детали  Very Low Input Voltage 2-Phase Synchronous Step-down Controllers with Step-up Converter
PDF  35 Pages
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производитель  SEMTECH [Semtech Corporation]
домашняя страница  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC2441ITSTRT датащи(HTML) 10 Page - Semtech Corporation

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 2005 Semtech Corp.
www.semtech.com
POWER MANAGEMENT
SC2441
Typical Performance Characteristics
VIN START AND UVLO THRESHOLD
VOLTAGES vs TEMPERATURE
1.5
1.6
1.7
1.8
1.9
2
-50
-25
0
25
50
75
100
TEMPERATURE (ºC)
VIN START
VIN UVLO
STEP-DOWN CHANNEL SWITCHING
FREQUENCY vs TEMPERATURE
480
485
490
495
500
505
510
515
520
-50
-25
0
25
50
75
100
TEMPERATURE (ºC)
ROSC = 51.1K
Ω
VCC START AND UVLO THRESHOLD
VOLTAGES vs TEMPERATURE
4
4.2
4.4
4.6
4.8
5
-50
-25
0
25
50
75
100
TEMPERATURE (ºC)
VCC START
VCC UVLO
MAXIMUM DUTY- CYCLE OF STEP-DOWN
CHANNEL vs TEMPERATURE
85
87
89
91
93
95
-50
-25
0
25
50
75
100
TEMPERATURE (ºC)
ROSC = 51.1K
Ω
STEP-UP SWITCH MAXIMUM DUTY- CYCLE
vs TEMPERATURE
80
82
84
86
88
90
-50
-25
0
25
50
75
100
TEMPERATURE (ºC)
ROSC = 51.1K
Ω
FB3 VOLTAGE vs TEMPERATURE
1.2
1.22
1.24
1.26
1.28
1.3
-50
-25
0
25
50
75
100
TEMPERATURE (ºC)
STEP-UP CONVERTER SWITCHING
FREQUENCY vs TEMPERATURE
950
960
970
980
990
1000
1010
1020
1030
1040
1050
-50
-25
0
25
50
75
100
TEMPERATURE (ºC)
ROSC = 51.1K
Ω
FB1 AND FB2 VOLTAGES vs TEMPERATURE
0.49
0.492
0.494
0.496
0.498
0.5
-50
-25
0
25
50
75
100
TEMPERATURE (ºC)
VIN = 2V
VCC = 5V
STEP-DOWN CONTROLLER CURRENT-LIMIT
THRESHOLD vs TEMPERATURE
40
42
44
46
48
50
-50
-25
0
25
50
75
100
TEMPERATURE (ºC)
VCC = 8V
CS(-) = 0
CS(-) = 5V



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