LT3990IMSE 데이터 시트보기 (PDF) - Linear Technology
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LT3990IMSE
Linear Technology
LT3990IMSE Datasheet PDF : 20 Pages
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LT3990
Typical Performance Characteristics TA = 25°C, unless otherwise noted.
Efficiency, VOUT = 3.3V
90
80
VIN = 24V
70
VIN = 12V
60
VIN = 36V
50
VIN = 48V
40
30
20
10
0.01
FRONT PAGE APPLICATION
VOUT = 3.3V
R1 = 1M
R2 = 576k
0.1
1
10
LOAD CURRENT (mA)
100
3990 G01
No-Load Supply Current
4.0
FRONT PAGE APPLICATION
VOUT = 3.3V
3.5
R1 = 1M
R2 = 576k
3.0
2.5
2.0
1.5
1.0
5
15 25 35 45
INPUT VOLTAGE (V)
55
3990 G04
Maximum Load Current
650
FRONT PAGE APPLICATION
VOUT = 5V
600
TYPICAL
550
500
MINIMUM
450
400
350
5
15 25 35 45
INPUT VOLTAGE (V)
55
3990 G07
Efficiency, VOUT = 5V
90
80
VIN = 24V
70
VIN = 12V
60
VIN = 36V
VIN = 48V
50
40
30
20
0.01
FRONT PAGE APPLICATION
0.1
1
10
LOAD CURRENT (mA)
100
3990 G02
No-Load Supply Current
15
FRONT PAGE APPLICATION
VIN = 12V
12
VOUT = 3.3V
R1 = 1M
R2 = 576k
9
6
3
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3990 G05
Maximum Load Current
600
500
LIMITED BY CURRENT LIMIT
400
LIMITED BY MAXIMUM
300
JUNCTION TEMPERATURE;
QJA = 45°C/W
200
100 FRONT PAGE APPLICATION
VIN = 12V
VOUT = 5V
0
–50 –25 0 25 50 75
TEMPERATURE (°C)
100 125
3990 G08
VFB vs Temperature
1.220
1.215
1.210
1.205
1.200
1.195
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3990 G03
Maximum Load Current
650
FRONT PAGE APPLICATION
VOUT = 3.3V
600
TYPICAL
550
MINIMUM
500
450
400
350
5
15 25 35 45
INPUT VOLTAGE (V)
55
3990 G06
Load Regulation
0.25
0.20
0.15
0.10
0.05
0
–0.05
–0.10
–0.15 FRONT PAGE APPLICATION
REFERENCED FROM VOUT AT 100mA LOAD
–0.20
0 50 100 150 200 250 300 350
LOAD CURRENT (mA)
3990 G09
3990f
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