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LTC1628 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC1628
Description  High Efficiency, 2-Phase Synchronous Step-Down Switching Regulators
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1628 Datasheet(HTML) 5 Page - Linear Technology

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5
LTC1628/LTC1628-PG
Internal 5V LDO Line Reg
Maximum Current Sense Threshold
vs Duty Factor
Maximum Current Sense Threshold
vs Percent of Nominal Output
Voltage (Foldback)
INPUT VOLTAGE (V)
0
4.8
4.9
5.1
15
25
1628 G07
4.7
4.6
510
20
30
35
4.5
4.4
5.0
ILOAD = 1mA
DUTY FACTOR (%)
0
0
25
50
75
20
40
60
80
1628 G08
100
PERCENT ON NOMINAL OUTPUT VOLTAGE (%)
0
40
50
60
100
1628 G09
30
20
0
25
50
75
10
80
70
Maximum Current Sense Threshold
vs VRUN/SS (Soft-Start)
VRUN/SS (V)
0
0
20
40
60
80
12
3
4
1628 G10
56
VSENSE(CM) = 1.6V
Maximum Current Sense Threshold
vs Sense Common Mode Voltage
COMMON MODE VOLTAGE (V)
0
72
76
80
4
1628 G11
68
64
60
1
2
3
5
Current Sense Threshold
vs ITH Voltage
VITH (V)
0
30
50
70
90
2
1628 G12
10
–10
20
40
60
80
0
–20
–30
0.5
1
1.5
2.5
Load Regulation
LOAD CURRENT (A)
0
–0.2
–0.1
4
1628 G13
–0.3
–0.4
1
2
3
5
0.0
FCB = 0V
VIN = 15V
FIGURE 1
VITH vs VRUN/SS
VRUN/SS (V)
0
0
0.5
1.0
1.5
2.0
2.5
1
23
4
1628 G14
56
VOSENSE = 0.7V
SENSE Pins Total Source Current
VSENSE COMMON MODE VOLTAGE (V)
0
0
1628 G15
–50
–100
24
50
100
6
TYPICAL PERFOR A CE CHARACTERISTICS


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