LTC1700EMS 查看數據表（PDF） - Linear Technology
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LTC1700EMS Datasheet PDF : 16 Pages
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LTC1700
TYPICAL PERFORMANCE CHARACTERISTICS
RUN/SS Current vs Temperature
6
5
4
3
2
1
0
– 55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
1700 G04
Normalized Oscillator Frequency
vs Temperature
1.08
1.06
1.04
1.02
1.00
0.98
0.96
0.94
– 55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
1700 G5
Minimum Operating Voltage
vs Temperature
1.4
2.28
1.2
2.26
START-UP
1.0
CIRCUIT
2.24
0.8
2.22
0.6
2.20
0.4
MAIN
CONTROLLER
2.18
0.2
2.16
0
2.14
– 55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
1700 G6
Maximum Current Sense Voltage
vs Temperature
90
80
70
60
– 55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
1700 G7
Start-Up Current Limit vs
Temperature
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0
– 55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
1700 G8
Efficiency vs Load Current
(Burst Mode Operation Disabled)
100
90
VIN = 4.2V
80
70
VIN = 3.3V
60
50
40
0.001
0.01
0.1
LOAD CURRENT (A)
1.0
1700 G09
3.3V Output Efficiency, Circuit of
Figure 1 with Burst Mode
Operation
100
90
VIN = 2.7V
80
VIN = 2V
70
60
50
40
30
0.001
0.01
0.1
LOAD CURRENT (A)
1.0
1700 G10
4
3.3V Output Efficiency, Circuit of
Figure 1 with Burst Mode
Operation Inhibited
100
90
80
VIN = 2.7V
VIN = 2V
70
60
50
40
30
0.001
0.01
0.1
LOAD CURRENT (A)
1.0
1700 F16
Load Step Transient Response
Burst Mode Operation Enabled
A/C COUPLED
OUTPUT
VOLTAGE
(0.2V/DIV)
INDUCTOR
CURRENT
(2A/DIV)
VIN = 3.3V
VOUT = 5V
2A/DIV
1700 G12
VSYNC = VIN
LOAD STEP = 100mA TO 1.7A
1700fa
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