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