LT3640I 데이터 시트보기 (PDF) - Linear Technology
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LT3640I Datasheet PDF : 24 Pages
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LT3640
Typical Performance Characteristics TA = 25°C, unless otherwise noted.
FB2 Voltage vs SS2
700
600
500
400
300
200
100
0
0
200 400 6000 800 1000
SS2 VOLTAGE (mV)
3640 G10
Switching Frequency
vs Temperature
0.52
RT = 182k
0.51
0.50
0.49
0.48
–50
0
50
100
TEMPERATURE (°C)
150
3640 G11
HV Channel Current Limit
vs Duty Cycle
2.5
2.0
1.5
1.0
0.5
0.0
0
20
40
60
80
100
DUTY CYCLE (%)
3640 G12
LV Channel Peak Current Limit
vs Duty Cycle
2.0
1.5
1.0
0.5
0.0
0
20
40
60
80 100
DUTY CYCLE (%)
3640 G13
LV Channel Switch Voltage
Drop vs Current (VIN2 = 3.3V)
450
400
350
300
PMOS
250
200
NMOS
150
100
50
0
0
0.5
1
1.5
SW2 CURRENT (A)
3640 G14
VOUT1 Minimum Load to Run at
Full Frequency (VOUT1 = 3.3V)
0.45
0.40
0.35
0.30
2.5MHz
0.25
2MHz
0.20
0.15
0.10
0.05
0
0
5 10 15 20 25 30
VIN VOLTAGE (V)
3640 G15
HV Channel Switching Frequency
(VOUT1 = 3.3V)
2.5 RT = 32.4k
VIN = 12V
2.0
LV Channel Switching Frequency
(VOUT2 = 1.8V)
2.5
VIN2 = 3.3V
2.0
1.5
VIN = 16V
1.0
VIN = 24V
0.5
1.5
VIN2 = 5V
1.0
0.5
0
0 0.2 0.4 0.6 0.8 1.0 1.2
VOUT1 CURRENT (A)
3640 G16
0
0
0.2 0.4 0.6 0.8 1.0
VOUT2 CURRENT (A)
3640 G17
3640f
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