LT3971IDD View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LT3971IDD Datasheet PDF : 28 Pages
| |||
LT3971/LT3971-3.3/LT3971-5
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VEN = 12V, VBD = 3.3V unless otherwise noted. (Note 2)
PG Leakage
PG Sink Current
SYNC Threshold
VPG = 3V
VPG = 0.4V
0.02
1
µA
l 300
570
μA
0.6
0.8
1.0
V
SYNC Pin Current
0.1
nA
SS Source Current
VSS = 1V
0.6
1
1.6
μA
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LT3971E is guaranteed to meet performance specifications
from 0°C to 125°C junction temperature. Specifications over the –40°C
to 125°C operating junction temperature range are assured by design,
characterization, and correlation with statistical process controls. The
LT3971I is guaranteed over the full –40°C to 125°C operating junction
temperature range. High junction temperatures degrade operating
lifetimes. Operating lifetime is derated at junction temperatures greater
than 125°C.
Note 3: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the switch.
Note 4: This is the minimum input voltage for operation with accurate FB
regulation. Minimum input voltage for output regulation depends on the
application circuit.
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.
Efficiency, VOUT = 5V
100
90
VIN = 12V
80
70
VIN = 36V
60
VIN = 24V
50
40
30
VOUT = 5V
R1 = 1M
20 R2 = 309k
0 0.2
0.4 0.6 0.8
LOAD CURRENT (A)
1 1.2
3971 G01
Efficiency, VOUT = 3.3V
90
80
VIN = 12V
70
60
VIN = 24V VIN = 36V
50
40
30
20
10
0
0.01
0.1
1
10 100 1000
LOAD CURRENT (mA)
3971 G04
Efficiency, VOUT = 3.3V
100
90
VIN = 12V
80
70
60
VIN = 36V
VIN = 24V
50
40
30
20
0 0.2 0.4 0.6 0.8 1 1.2
LOAD CURRENT (A)
3971 G02
No Load Supply Current
100
DIODES, INC.
DFLS2100
10
1
–55 –25
5 35 65 95
TEMPERATURE (°C)
125 155
3971 G05
4
Efficiency, VOUT = 5V
100
VOUT = 5V
90 R1 = 1M
80 R2 = 309k
70
VIN = 12V
60
VIN = 24V
VIN = 36V
50
40
30
20
10
0
0.01
0.1
1
10
100 1000
LOAD CURRENT (mA)
3971 G03
No Load Supply Current
4.0
3.5
LT3971
3.0
VOUT = 3.3V
2.5
LT3971-5
2.0
LT3971-3.3
1.5
1.0
5
10 15 20 25 30 35
INPUT VOLTAGE (V)
3971 G06
3971fd
Share Link: 