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LT3990 Datasheet(PDF) 4 Page - Linear Technology

Part # LT3990
Description  60V, 350mA Step-Down Regulator with 2.5關A Quiescent Current and Integrated Diodes
PDF  20 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3990 Datasheet(HTML) 4 Page - Linear Technology

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LT3990
4
3990p
TYPICAL PERFORMANCE CHARACTERISTICS
No-Load Supply Current
No-Load Supply Current
Maximum Load Current
Maximum Load Current
Maximum Load Current
Load Regulation
Efficiency, VOUT = 3.3V
Efficiency, VOUT = 5V
VFB vs Temperature
TA = 25°C, unless otherwise noted.
LOAD CURRENT (mA)
50
70
90
40
60
80
0.01
1
10
100
3990 G01
30
0.1
VIN = 12V
FRONT PAGE APPLICATION
VOUT = 3.3V
R1 = 1M
R2 = 576k
VIN = 36V
VIN = 24V
LOAD CURRENT (mA)
50
70
90
40
60
80
0.01
1
10
100
3990 G02
30
0.1
VIN = 12V
FRONT PAGE APPLICATION
VIN = 36V
VIN = 24V
TEMPERATURE (°C)
–50
1.210
1.215
1.220
25
75
150
3990 G03
1.205
1.200
1.195
–25
0
50
100 125
INPUT VOLTAGE (V)
1.0
1.5
2.0
2.5
3.0
10
20
30
40
3990 G04
3.5
4.0
515
25
35
FRONT PAGE APPLICATION
VOUT = 3.3V
R1 = 1M
R2 = 576k
TEMPERATURE (°C)
–50
9
12
15
25
75
150
3990 G05
6
3
0
–25
0
50
100 125
FRONT PAGE APPLICATION
VIN = 12V
VOUT = 3.3V
R1 = 1M
R2 = 576k
INPUT VOLTAGE (V)
5
350
400
450
500
550
10
15
20
25
3990 G06
30
35
40
FRONT PAGE APPLICATION
VOUT = 3.3V
TYPICAL
MINIMUM
INPUT VOLTAGE (V)
5
350
400
450
500
600
550
10
15
20
25
3990 G07
30
35
40
FRONT PAGE APPLICATION
VOUT = 5V
TYPICAL
MINIMUM
TEMPERATURE (°C)
–50
300
400
500
600
25
75
3990 G08
200
100
0
–25
0
50
100
125
FRONT PAGE APPLICATION
VIN = 12V
VOUT = 5V
LIMITED BY MAXIMUM
JUNCTION TEMPERATURE;
JA = 76°C/W
LIMITED BY CURRENT LIMIT
LOAD CURRENT (mA)
0
0.15
150
3990 G09
0
–0.10
50
100
200
–0.15
–0.20
0.20
0.10
0.05
–0.05
250
300
350
FRONT PAGE APPLICATION
REFERENCED FROM VOUT AT 100mA LOAD



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