LT1110 Datasheet, PDF (4/16 Pages) Linear Technology – Micropower DC-DC Converter Adjustable and Fixed 5V, 12V

LT1110
TYPICAL PERFOR A CE CHARACTERISTICS
Duty Cycle
78
76
74
72
70
68
66
64
62
60
58
–50 –25 0 25 50 75 100
TEMPERATURE (°C)
LT1110 • TPC04
Switch On Voltage
Step-Down Mode
1.4
V_IN = 12V
1.2
1.0
0.8
0.6
0.4
0.2
0
0
0.2 0.4 0.6
I_SWITCH (A)
0.8 1.0
LT1110 • TPC07
Quiescent Current
500
450
400
350
300
250
200
150
100
–50 –25
0 25 50 75 100
TEMPERATURE (°C)
LT1110 • TPC10
4
Switch Saturation Voltage
500
450
V_IN = 1.5V
I_SW = 500mA
400
350
300
250
200
150
100
50
0
–50 – 25 0
25 50 75 100
TEMPERATURE (°C)
LT1110 • TPC05
Minimum/Maximum Frequency vs
On Time
100
95
90
85
80
75
0°C ≤ T_A ≤ 70°C
70
65
60
55
50
45
40
7
8
9 10 11 12 13
SWITCH ON TIME (µs)
LT1110 • TPC08
Maximum Switch Current vs
R_LIM Step-Up
1.5
1.3
1.1
STEP-UP MODE
0.9
V_IN ≤ 5V
0.7
0.5
0.3
0.1
10
100
R_LIM (Ω)
1000
LT1110 • TPC11
Saturation Voltage
Step-Up Mode
1.4
V_IN = 3.0V
1.2
V_IN= 2.0V
V_IN = 1.5V
1.0
0.8
V_IN = 1.2V
0.6
0.4 ^{VIN = 1.0V}
V_IN = 5.0V
0.2
0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
I_SWITCH (A)
LT1110 • TPC06
Quiescent Current
400
380
360
340
320
300
280
260
240
220
200
0 3 6 9 12 15 18 21 24 27 30
INPUT VOLTAGE (V)
LT1110 • TPC09
Maximum Switch Current vs
R_LIM Step-Down
1.5
1.3
1.1
0.9
STEP-DOWN MODE
0.7
V_IN = 12V
0.5
0.3
0.1
10
100
R_LIM (Ω)
1000
LT1110 • TPC12