Datasheet

LT3971/LT3971-3.3/LT3971-5
5
3971fd
TYPICAL PERFORMANCE CHARACTERISTICS
Switch Current Limit
Switch Current Limit
Load Regulation
Switching Frequency
LT3971 Feedback Voltage
T
A
= 25°C, unless otherwise noted.
LT3971-3.3 Output Voltage LT3971-5 Output Voltage
TEMPERATURE (°C)
FEEDBACK VOLTAGE (V)
3971 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)
3971 G28
3.345
3.270
3.285
3.300
3.315
3.330
3.255
–55 15565 95 125355–25
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
3971 G29
5.06
4.96
4.98
5.00
5.02
5.04
4.94
–55 15565 95 125355–25
LOAD CURRENT (mA)
LOAD REGULATION (%)
3971 G10
0.30
–0.25
–0.20
–0.15
–0.10
–0.05
0.20
0.15
0.10
0.05
0
0.25
–0.30
0 1200600 800 1000400200
REFERENCED FROM V
OUT
AT 0.5A LOAD
TEMPERATURE (°C)
FREQUENCY (kHz)
3971 G11
1000
650
900
850
800
750
700
950
600
–55 15535 65 125955–25
DUTY CYCLE (%)
SWITCH CURRENT LIMIT (A)
3971 G12
3.0
2.0
1.5
1.0
0.5
2.5
0
0 10060 804020
TEMPERATURE (°C)
SWITCH CURRENT LIMIT (A)
3971 G13
2.5
2.4
2.3
2.2
2.1
2.0
1.5
1.6
1.7
1.8
1.9
–55 –25 1551259565355
DUTY CYCLE = 30%
Maximum Load Current Maximum Load Current
INPUT VOLTAGE (V)
LOAD CURRENT (A)
3971 G08
3.0
0.5
1.0
1.5
2.0
2.5
0
5 4025 30 35
TYPICAL
MINIMUM
201510
V
OUT
= 3.3V
INPUT VOLTAGE (V)
LOAD CURRENT (A)
3971 G09
2.5
0.5
1.0
1.5
2.0
0
5 4025 30 35
TYPICAL
MINIMUM
201510
V
OUT
= 5V