Datasheet

LT3971A/LT3971A-5
4
3971af
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency, V
OUT
= 3.3V No Load Supply Current No Load Supply Current
Efficiency, V
OUT
= 5V Efficiency, V
OUT
= 3.3V Efficiency, V
OUT
= 5V
T
A
= 25°C, unless otherwise noted.
LT3971A Feedback Voltage
LT3971A-5 Output Voltage Maximum Load Current
LOAD CURRENT (A)
EFFICIENCY (%)
3971A G01
100
30
40
50
60
70
80
90
20
0 1.210.80.60.40.2
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
V
OUT
= 5V
R1 = 1M
R2 = 309k
LOAD CURRENT (A)
EFFICIENCY (%)
3971A G02
100
30
40
50
60
70
80
90
20
0 1.210.80.60.40.2
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
LOAD CURRENT (mA)
EFFICIENCY (%)
3971A G03
100
30
20
10
40
50
60
70
80
90
0
0.01 10001001010.1
V
IN
= 36V
V
OUT
= 5V
R1 = 1M
R2 = 309k
V
IN
= 24V
V
IN
= 12V
LOAD CURRENT (mA)
EFFICIENCY (%)
3971A G04
90
30
20
10
40
50
60
70
80
0
0.01 10001001010.1
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
TEMPERATURE (°C)
INPUT CURRENT (µA)
3971A G05
100
10
1
–55 –25 1551259565355
DIODES, INC.
DFLS2100
510203015 25 35
INPUT VOLTAGE (V)
INPUT CURRENT (µA)
1.0
3971A G06
2.0
1.5
4.0
3.5
3.0
2.5
LT3971A-5
LT3971A
V
OUT
= 3.3V
TEMPERATURE (°C)
FEEDBACK VOLTAGE (V)
3971A G07
1.205
1.180
1.185
1.190
1.195
1.200
1.175
–55 15565 95 125355–25
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
3971A G08
5.06
4.96
4.98
5.00
5.02
5.04
4.94
–55 15565 95 125355–25
INPUT VOLTAGE (V)
LOAD CURRENT (A)
3971A G09
3.0
0.5
1.0
1.5
2.0
2.5
0
54025 30 35
TYPICAL
MINIMUM
201510
V
OUT
= 3.3V