LT1109 Datasheet, PDF (3/8 Pages) Linear Technology – Micropower Low Cost DC/DC Converter Adjustable and Fixed 5V, 12V

LT110 9
ELECTRICAL CHARACTERISTICS T_A = 25°C, V_IN = 3V (LT1109CN8, LT1109CS8), unless otherwise specified.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
Switch Leakage Current
V_SW = 12V
1
10
V_IH
SHUTDOWN Pin High
N8, S8 Package
q
2.0
V_IL
SHUTDOWN Pin Low
N8, S8 Package
q
0.8
I_IH
SHUTDOWN Pin Input Current N8, S8 Package, V_SHUTDOWN = 4V
q
10
I_IL
SHUTDOWN Pin Input Current N8, S8 Package, V_SHUTDOWN = 0V
q
20
The q denotes the specifications which apply over the full operating
temperature range.
UNITS
µA
V
V
µA
µA
TYPICAL PERFOR A CE CHARACTERISTICS
Oscillator Frequency
160
140
120
100
80
60
–50 –25 0
25 50 75 100
TEMPERATURE (°C)
LT1109 • TPC02
Duty Cycle
70
65
60
55
50
45
40
35
30
–50 –25 0 25 50 75 100
TEMPERATURE (°C)
LT1109 • TPC05
Oscillator Frequency
130
128
126
124
122
120
118
116
114
112
110
0 2 4 6 8 10 12 14 16 18 20
INPUT VOLTAGE (V)
LT1109 • TPC03
Switch Saturation Voltage
700
I_SW = 500mA
600
500
400
300
200
100
0
–50 –25 0
25 50 75 100
TEMPERATURE (°C)
LT1109 • TPC06
Switch ON Time
7
6
5
4
3
–50 –25 0
25 50 75 100
TEMPERATURE (°C)
LT1109 • TPC04
Switch Saturation Voltage
1.2
V_IN = 5V
1.0 ^{TA = 25°C}
0.8
0.6
0.4
0.2
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
SWITCH CURRENT (A)
LT1109 • TPC07
3