LT1109A Datasheet, PDF (3/8 Pages) Linear Technology – Micropower DC/DC Converter Flash Memory VPP Generator Adjustable and Fixed 5V, 12V

TYPICAL PERFOR A CE CHARACTERISTICS
LT1109A
Efficiency
90
V_IN = 5V
V_OUT = 12V
LOAD = 120mA
85 _{L = 29µH}
80
75
70
4.2 4.4 4.6 4.8 5.0 5.2 5.4 5.6 5.8
INPUT VOLTAGE (V)
1109A G01
Oscillator Frequency
160
140
120
100
80
60
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
1109A G02
Duty Cycle
80
75
70
65
60
55
50
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
1109A G03
Switch Saturation Voltage
1.4
V_IN = 3V
1.2
V_IN = 2V
1.0
0.8
V_IN = 5V
0.6
0.4
0.2
0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
I_SWITCH (A)
1109A G04
Switch Saturation Voltage
0.7
I_SW = 650mA
0.6
0.5
0.4
0.3
0.2
0.1
0
–50 –25 0 25 50
TEMPERATURE (°C)
75 100
1109A G05
Switch On Time
8
7
6
5
4
3
–50 –25 0 25 50
TEMPERATURE (°C)
75 100
1109A G06
Quiescent Current
500
450
400
350
300
250
200
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
1109A G07
Quiescent Current
500
T_A = 25°C
450
400
350
300
250
0 2 4 6 8 10 12 14 16 18 20
INPUT VOLTAGE (V)
1109A G08
3