Datasheet

LT1109
3
CCHARA TERIST
ICS
UW
AT
Y
P
I
CA
LPER
F
O
R
C
E
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Switch Leakage Current V
SW
= 12V 1 10 µA
V
IH
SHUTDOWN Pin High N8, S8 Package ● 2.0 V
V
IL
SHUTDOWN Pin Low N8, S8 Package ● 0.8 V
I
IH
SHUTDOWN Pin Input Current N8, S8 Package, V
SHUTDOWN
= 4V ● 10 µA
I
IL
SHUTDOWN Pin Input Current N8, S8 Package, V
SHUTDOWN
= 0V ● 20 µA
The ● denotes the specifications which apply over the full operating
temperature range.
E
LECTR
IC
AL C CHARA TERIST
ICS
T
A
= 25°C, V
IN
= 3V (LT1109CN8, LT1109CS8), unless otherwise specified.
INPUT VOLTAGE (V)
0
110
OSCILLATOR FREQUENCY (kHz)
114
118
122
128
130
220
LT1109 • TPC03
46810
126
124
120
116
112
12 14 16 18
TEMPERATURE (°C)
–50
60
FREQUENCY (kHz)
80
100
120
140
160
–25 100
LT1109 • TPC02
0 255075
Oscillator Frequency Oscillator Frequency Switch ON Time
TEMPERATURE (°C)
–50
3
SWITCH ON TIME (µs)
4
7
100
LT1109 • TPC04
–25 0 25
6
5
50 75
TEMPERATURE (°C)
–50
0
V
CESAT
(mV)
200
700
100
LT1109 • TPC06
–25 0 25
500
400
50 75
600
300
100
I
SW
= 500mA
SWITCH CURRENT (A)
0
0
V
CESAT
(V)
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
V
IN
= 5V
T
A
= 25°C
0.2 0.4 0.6 0.8
Duty Cycle Switch Saturation Voltage Switch Saturation Voltage
TEMPERATURE (°C)
–50
30
DUTY CYCLE (%)
40
70
100
LT1109 • TPC05
–25 0 25
60
50
50 75
65
55
45
35