Datasheet

LT3995
4
3995f
For more information www.linear.com/LT3995
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency at 3.3V
OUT
No-Load Supply Current No-Load Supply Current
Reference Voltage
Efficiency at 5V
OUT
Efficiency at 3.3V
OUT
Efficiency at 5V
OUT
Load Regulation Line Regulation
T
A
= 25°C, unless otherwise noted.
LOAD CURRENT (A)
0
50
EFFICIENCY (%)
60
70
80
0.5
1
1.5 2
3995 G01
2.5
90
100
55
65
75
85
95
3
12V
24V
36V
48V
L: MSS1260-682ML
f
SW
= 500kHz
LOAD CURRENT (A)
0
40
EFFICIENCY (%)
50
60
70
0.5
1
1.5 2
3995 G02
2.5
80
90
45
55
65
75
85
3
12V
24V
36V
48V
L: MSS1260-822ML
f
SW
= 300kHz
LOAD CURRENT (mA)
0.01
0
EFFICIENCY (%)
20
40
60
0.1
1
10 100
3995 G03
1000
80
100
10
30
50
70
90
10000
12V
24V
36V
48V
L: MSS1260-682ML
f
SW
= 500kHz
LOAD CURRENT (mA)
0.01
0
EFFICIENCY (%)
20
40
60
0.1
1
10 100
3995 G04
1000
80
100
10
30
50
70
90
10000
12V
24V
36V
48V
L: MSS1260-822ML
f
SW
= 300kHz
INPUT VOLTAGE (V)
0
1.0
INPUT CURRENT (µA)
1.5
2.5
3.0
3.5
30 35 40 5045 55
4.5
3995 G05
2.0
5 10 15 20 25 60
4.0
IN REGULATION
V
OUT
= 3.3V
TEMPERATURE (°C)
10
INPUT CURRENT (µA)
1000
10000
–55 65 125
3975 G06
1
5–25 95 15535
100
FRONT PAGE APPLICATION
V
IN
= 12V
V
OUT
= 3.3V
DUE TO CATCH
DIODE LEAKAGE
TEMPERATURE (°C)
–55
REFERENCE VOLTAGE (V)
1.190
1.220
1.225
1.230
5
65
95
3995 G07
1.180
1.175
1.210
1.200
1.185
1.215
1.170
1.205
1.195
–25
35
125
155
LOAD CURRENT (A)
0
CHANGE IN V
OUT
(%)
0
3995 G08
–0.10
–0.20
1 2
0.5
1.5 2.5
0.10
0.20
–0.05
–0.15
0.05
0.15
3
V
IN
= 12V
V
OUT
= 5V
INPUT VOLAGE (V)
–0.15
CHANGE IN V
OUT
(%)
–0.05
0.05
0.15
–0.10
0
0.10
15 3025 40 50
3995 G09
60105 20 35 45 55
V
OUT
= 5V
LOAD = 1A