LT1109 Linear Technology, LT1109 Datasheet - Page 3

• Manufacturer Part Number: LT1109
• Description: Micropower Low Cost DC/DC Converter Adjustable and Fixed 5V/ 12V
• Manufacturer: Linear Technology

SYMBOL
V
V
I
I
The
temperature range.
TYPICAL PERFOR
ELECTRICAL C
IH
IL
IH
IL
160
140
120
100
80
60
70
65
60
55
50
45
40
35
30
–50
–50
denotes the specifications which apply over the full operating
Oscillator Frequency
Duty Cycle
–25
–25
PARAMETER
Switch Leakage Current
SHUTDOWN Pin High
SHUTDOWN Pin Low
SHUTDOWN Pin Input Current
SHUTDOWN Pin Input Current
TEMPERATURE (°C)
TEMPERATURE (°C)
0
0
25
25
HARA TERISTICS
50
50
W
LT1109 • TPC02
LT1109 • TPC05
75
75
A
C
U
100
100
CE
CONDITIONS
N8, S8 Package
N8, S8 Package
N8, S8 Package, V
N8, S8 Package, V
V
SW
C
= 12V
HARA TERISTICS
130
128
126
124
122
120
118
116
114
112
110
700
600
500
400
300
200
100
0
–50
0
Oscillator Frequency
Switch Saturation Voltage
2
–25
T
A
SHUTDOWN
SHUTDOWN
C
4
= 25 C, V
6
INPUT VOLTAGE (V)
TEMPERATURE (°C)
0
8 10
= 4V
= 0V
25
IN
= 3V (LT1109CN8, LT1109CS8), unless otherwise specified.
12 14 16 18
50
I
SW
= 500mA
LT1109 • TPC03
LT1109 • TPC06
75
100
20
MIN
2.0
1.2
1.0
0.8
0.6
0.4
0.2
7
6
5
4
3
0
–50
Switch ON Time
Switch Saturation Voltage
0
TYP
V
T
1
0.1
A
IN
= 25°C
–25
= 5V
0.2
SWITCH CURRENT (A)
0.3
TEMPERATURE (°C)
0
0.4
MAX
0.8
10
10
20
0.5
25
0.6
LT1109
50
0.7
0.8
LT1109 • TPC04
LT1109 • TPC07
75
UNITS
0.9
3
100
1.0
A
V
V
A
A