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LTC1709-8 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC1709-8
Description  2-Phase, 5-Bit VID,Current Mode, High Efficiency,Synchronous Step-Down Switching Regulators
Download  28 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1709-8 Datasheet(HTML) 5 Page - Linear Technology

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5
LTC1709-8/LTC1709-9
TYPICAL PERFOR A CE CHARACTERISTICS
Supply Current vs Input Voltage
and Mode (Figure 12)
EXTVCC Voltage Drop
INTVCC and EXTVCC Switch
Voltage vs Temperature
INPUT VOLTAGE (V)
05
0
400
1000
10
20
25
170989 G04
200
800
600
15
30
35
ON
SHUTDOWN
CURRENT (mA)
0
150
200
250
40
170989 G05
100
50
0
10
20
30
50
TEMPERATURE (
°C)
–50
4.95
5.00
5.05
25
75
170989 G06
4.90
4.85
–25
0
50
100
125
4.80
4.70
4.75
INTVCC VOLTAGE
EXTVCC SWITCHOVER THRESHOLD
Maximum Current Sense Threshold
vs Percent of Nominal Output
Voltage (Foldback)
Internal 5V LDO Line Regulation
Maximum Current Sense Threshold
vs Duty Factor
INPUT VOLTAGE (V)
0
4.8
4.9
5.1
15
25
170989 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
170989 G08
100
PERCENT ON NOMINAL OUTPUT VOLTAGE (%)
0
40
50
60
100
170989 G09
30
20
0
25
50
75
10
80
70
Maximum Current Sense Threshold
vs VRUN/SS (Soft-Start)
Maximum Current Sense Threshold
vs Sense Common Mode Voltage
Current Sense Threshold
vs ITH Voltage
VRUN/SS (V)
0
0
20
40
60
80
12
3
4
170989 G10
56
VSENSE(CM) = 1.6V
COMMON MODE VOLTAGE (V)
0
72
76
80
4
170989 G11
68
64
60
1
2
3
5
VITH (V)
0
30
50
70
90
2
170989 G12
10
–10
20
40
60
80
0
–20
–30
0.5
1
1.5
2.5


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