LTC3780IUH(RevE) Просмотр технического описания (PDF) - Linear Technology
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LTC3780IUH Datasheet PDF : 28 Pages
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LTC3780
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.
Oscillator Frequency
vs Temperature
450
400
VPLLFLTR = 2.4V
350
VPLLFLTR = 1.2V
300
250
VPLLFLTR = 0V
200
150
100
50
0
–75 –50 –25 0 25 50 75 100 125
TEMPERATURE (°C)
3780 G19
Maximum Current Sense
Threshold vs Duty Factor (Boost)
180
160
140
120
100
0
20
40
60
80 100
DUTY FACTOR (%)
3780 G22
Peak Current Threshold
vs VITH (Boost)
200
150
100
50
0
–50
–100
0
0.4 0.8 1.2 1.6
VITH (V)
1.8 2.4
3780 G25
8
Undervoltage Reset
vs Temperature
4.2
4.0
3.8
3.6
3.4
3.2
3.0
–75 –50 –25 0 25 50 75 100 125
TEMPERATURE (°C)
3780 G20
Maximum Current Sense
Threshold vs Duty Factor (Buck)
140
130
120
110
0
20
40
60
80
100
DUTY FACTOR (%)
3780 G23
Valley Current Threshold
vs VITH (Buck)
100
50
0
–50
–100
–150
0
0.4 0.8 1.2 1.6
VITH (V)
2.0 2.4
3780 G26
Minimum Current Sense
Threshold vs Duty Factor (Buck)
–20
–40
–60
–80
100
80
60
40
20
0
DUTY FACTOR (%)
3780 G21
Minimum Current Sense
Threshold vs Temperature
200
BOOST
150
100
50
0
–50
–100
BUCK
–150
–75 –50 –25 0 25 50 75 100 125
TEMPERATURE (°C)
3780 G24
Current Foldback Limit
200
160
120
BOOST
BUCK
80
40
0
0
0.2
0.4
0.6
0.8
VOSENSE (V)
3780 G32
3780fe
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