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LTC1929 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC1929
Description  2-Phase, High Efficiency,Synchronous Step-Down Switching Regulators
PDF  28 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1929 Datasheet(HTML) 5 Page - Linear Technology

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5
LTC1929/LTC1929-PG
TYPICAL PERFOR A CE CHARACTERISTICS
Supply Current vs Input Voltage
and Mode
EXTVCC Voltage Drop
INTVCC and EXTVCC Switch
Voltage vs Temperature
INPUT VOLTAGE (V)
05
0
400
1000
10
20
25
1929 G04
200
800
600
15
30
35
ON
SHUTDOWN
VOUT = 5V
VEXTVCC = VOUT
CURRENT (mA)
0
150
200
250
40
1929 G05
100
50
0
10
20
30
50
LTC1929
LTC1929-PG
TEMPERATURE (
°C)
–50
4.95
5.00
5.05
25
75
1929 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 on Nominal Output
Voltage (Foldback)
Internal 5V LDO Line Reg
Maximum Current Sense Threshold
vs Duty Factor
INPUT VOLTAGE (V)
0
4.8
4.9
5.1
15
25
1929 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
1929 G08
100
PERCENT ON NOMINAL OUTPUT VOLTAGE (%)
0
40
50
60
100
1929 G09
30
20
0
25
50
75
10
80
70
Maximum Current Sense Threshold
vs Sense Common Mode Voltage
Maximum Current Sense Threshold
vs VRUN/SS (Soft-Start)
Current Sense Threshold
vs ITH Voltage
VRUN/SS (V)
0
0
20
40
60
80
12
3
4
1929 G10
56
VSENSE(CM) = 1.6V
COMMON MODE VOLTAGE (V)
0
72
76
80
4
1929 G11
68
64
60
1
2
3
5
VITH (V)
0
30
50
70
90
2
1929 G12
10
–10
20
40
60
80
0
–20
–30
0.5
1
1.5
2.5



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