LT3992 데이터 시트보기 (PDF) - Linear Technology
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LT3992 Datasheet PDF : 36 Pages
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LT3992
Typical Performance Characteristics
Switching Phase vs Temperature
195
193
191
189
187
185
183
181
179
177
175
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3992 G10
Synchronization Duty Cycles
vs Temperature
100
RT/SYNC FREQUENCY = 1MHz
90
80
MAXIMUM RT/SYNC DUTY CYCLE
70
60
50
40
30
MINIMUM RT/SYNC DUTY CYCLE
20
10
0
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3992 G13
Boost Current vs Temperature
100
90
80
70
3A
60
50
40
30
1A
20
10
0
–50 –25
0.5A
0 25 50 75 100 125 150
TEMPERATURE (°C)
3992 G16
6
CLKOUT-to-SW1 Delay
vs Temperature
160
150
140
130
120
110
100
90
80
70
60
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3992 G11
DIV Voltage Threshold
vs Temperature
1.8
1.6
÷8
1.4
1.2
÷4
1.0
0.8
0.6
÷2
0.4
0.2
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3992 G14
Switch Peak Current
vs Temperature
5.0
4.5
VILIM = 1.5V
4.0
3.5
3.0
2.5
VILIM = 0.5V
2.0
1.5
1.0
0.5
0
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3992 G17
For more information www.linear.com/LT3992
RT/SYNC-to-CLKOUT and SW1
Delay vs Temperature
450
400
SW1
350
300
CLKOUT
250
200
150
100
50
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3992 G12
Switch Saturation Voltage
vs Temperature
400
350
ISW = 3A
300
250
ISW = 1A
200
ISW = 500mA
150
100
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3992 G15
Minimum Boost Voltage
vs Temperature
3.00
ISW = 3A
2.75
2.50
2.25
2.00
1.75
1.50
1.25
1.00
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3992 G18
3992fa
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