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LT1939EDD Datasheet(PDF) 4 Page - Linear Technology

Part # LT1939EDD
Description  Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1939EDD Datasheet(HTML) 4 Page - Linear Technology

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LT1939
4
1939f
TYPICAL PERFORMANCE CHARACTERISTICS
Feedback Voltage vs Temperature
RT/SYNC Voltage vs Temperature
Shutdown Threshold and Minimum
Input Voltage vs Temperature
Shutdown Pin Currents vs
Temperature
Shutdown Quiescent Current vs
Temperature
Error Amplifier gm vs Temperature
Soft-Start Source Current vs
Temperature
Soft-Start Feedback Offset vs
Temperature
VC Switching Threshold vs
Temperature
TEMPERATURE (°C)
–50
0.800
FB
LFB
0.810
150
1939 G01
0.790
0.780
0
50
100
–25
25
75
125
0.820
0.795
0.805
0.785
0.815
TEMPERATURE (°C)
–50
0.90
0.92
0.96
0.98
1.00
1.10
1.04
0
50
75
1939 G02
0.94
1.06
1.08
1.02
–25
25
100 125
150
RRT/SYNC = 90.9k
RRT/SYNC = 15k
TEMPERATURE (°C)
–50
2.0
2.5
3.0
25
75
1939 G03
1.5
1.0
–25
0
50
100
150
125
0.5
0
MINIMUM INPUT VOLTAGE
SHUTDOWN THRESHOLD
TEMPERATURE (°C)
–50
0
1
2
3
4
050
100
150
1939 G04
5
6
–25
25
75
125
VSHDN = 0.7V
VSHDN = 0.9V
TEMPERATURE (°C)
–50
0
2.5
5.0
7.5
10.0
050
100
150
1939 G05
12.5
15.0
–25
25
75
125
TEMPERATURE (°C)
–50
100
150
200
250
300
050
100
150
1939 G06
350
400
–25
25
75
125
TEMPERATURE (°C)
–50
1.5
1.7
2.1
2.3
2.5
3.5
2.9
0
50
75
1939 G07
1.9
3.1
3.3
2.7
–25
25
100 125
150
TEMPERATURE (°C)
–50
50
75
100
125
150
LFB
FB
–25
0
25
50
1939 G08
75
100 125 150
TEMPERATURE (°C)
–50
0.50
0.55
0.65
0.70
0.75
50
0.95
1939 G09
0.60
0
–25
75
100
25
150
125
0.80
0.85
0.90


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