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LT1109 Datasheet(PDF) 3 Page - Linear Technology

Part # LT1109
Description  Micropower Low Cost DC/DC Converter Adjustable and Fixed 5V, 12V
PDF  8 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1109 Datasheet(HTML) 3 Page - Linear Technology

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LT1109
3
CC
HARA TERISTICS
A
TYPICALPERFOR
CE
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Switch Leakage Current
VSW = 12V
1
10
µA
VIH
SHUTDOWN Pin High
N8, S8 Package
q
2.0
V
VIL
SHUTDOWN Pin Low
N8, S8 Package
q
0.8
V
IIH
SHUTDOWN Pin Input Current
N8, S8 Package, VSHUTDOWN = 4V
q
10
µA
IIL
SHUTDOWN Pin Input Current
N8, S8 Package, VSHUTDOWN = 0V
q
20
µA
The q denotes the specifications which apply over the full operating
temperature range.
ELECTRICAL C
C
HARA TERISTICS T
A = 25°C, VIN = 3V (LT1109CN8, LT1109CS8), unless otherwise specified.
INPUT VOLTAGE (V)
0
110
114
118
122
128
130
220
LT1109 • TPC03
46
8
10
126
124
120
116
112
12 14 16 18
TEMPERATURE (°C)
–50
60
80
100
120
140
160
–25
100
LT1109 • TPC02
0
255075
Oscillator Frequency
Oscillator Frequency
Switch ON Time
TEMPERATURE (°C)
–50
3
4
7
100
LT1109 • TPC04
–25
0
25
6
5
50
75
TEMPERATURE (°C)
–50
0
200
700
100
LT1109 • TPC06
–25
0
25
500
400
50
75
600
300
100
ISW = 500mA
SWITCH CURRENT (A)
0
0
0.4
1.2
1.0
LT1109 • TPC07
0.1
0.3
0.5
0.8
0.6
0.7
0.9
1.0
0.2
VIN = 5V
TA = 25°C
0.2
0.4
0.6
0.8
Duty Cycle
Switch Saturation Voltage
Switch Saturation Voltage
TEMPERATURE (°C)
–50
30
40
70
100
LT1109 • TPC05
–25
0
25
60
50
50
75
65
55
45
35



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