lt3990 Linear Technology Corporation, lt3990 Datasheet - Page 4

• Manufacturer Part Number: lt3990
• Description: 60v, 350ma Step-down Regulator With 2.5?a Quiescent Current And Integrated Diodes
• Manufacturer: Linear Technology Corporation

LT3990
Typical perFormance characTerisTics

600
500
400
550
450
350
2.5
4.0
3.5
3.0
2.0
1.5
1.0
90
80
70
60
50
40
30
20
0.01
5
5
Efficiency, V
No-Load Supply Current
Maximum Load Current
FRONT PAGE APPLICATION
V
OUT
10
10
= 5V
0.1
V
15
LOAD CURRENT (mA)
15
INPUT VOLTAGE (V)
IN
INPUT VOLTAGE (V)
= 48V
OUT
FRONT PAGE APPLICATION
V
R1 = 1M
R2 = 576k
FRONT PAGE APPLICATION
V
R1 = 1M
R2 = 576k
V
20
20
OUT
1
OUT
IN
= 3.3V
= 24V
= 3.3V
= 3.3V
V
IN
25
25
= 36V
MINIMUM
10
TYPICAL
30
30
V
IN
= 12V
100
35
35
3990 G01
3990 G04
3990 G07
40
40
600
500
200
400
300
100
15
12
90
80
70
60
50
40
30
20
6
3
0
0
9
0.01
–50
–50
Efficiency, V
No-Load Supply Current
Maximum Load Current
FRONT PAGE APPLICATION
V
V
R1 = 1M
R2 = 576k
FRONT PAGE APPLICATION
V
V
IN
OUT
V
IN
OUT
IN
–25
–25
= 12V
= 12V
LIMITED BY CURRENT LIMIT
JUNCTION TEMPERATURE;
= 12V
= 3.3V
= 5V
0.1
LIMITED BY MAXIMUM
0
V
LOAD CURRENT (mA)
IN
0
TEMPERATURE (°C)
TEMPERATURE (°C)
= 48V
OUT
25
V
FRONT PAGE APPLICATION
25
IN
1
JA
= 5V
= 24V
50
= 45°C/W
V
50
IN
75
= 36V
10
75
100 125
100
100
T
A
3990 G05
3990 G08
3990 G02
= 25°C, unless otherwise noted.
150
125
1.220
1.215
1.205
1.195
–0.05
–0.10
–0.15
–0.20
1.210
1.200
0.20
0.15
0.10
0.05
400
550
500
450
350
0
–50
0
5
V
Maximum Load Current
Load Regulation
FRONT PAGE APPLICATION
REFERENCED FROM V
FRONT PAGE APPLICATION
V
FB
OUT
–25
50
vs Temperature
10
= 3.3V
0
100
15
LOAD CURRENT (mA)
TEMPERATURE (°C)
INPUT VOLTAGE (V)
25
150
20
50
OUT
200
25
AT 100mA LOAD
75
MINIMUM
TYPICAL
250
30
100 125
300
35
3990 G09
3990 G03
3990 G06
3990p
350
150
40