LT3471 Ver la hoja de datos (PDF) - Linear Technology
Número de pieza
componentes Descripción
Fabricante
LT3471 Datasheet PDF : 16 Pages
| |||
LT3471
ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are TA = 25°C. VIN = VSHDN = 3V unless otherwise noted.
PARAMETER
SHDN Input Voltage Low
SHDN Pin Bias Current
CONDITIONS
Quiescent Current ≤ 1μA
VSHDN = 3V, VIN = 4V
VSHDN = 0V
MIN TYP MAX
0.3
22
36
0
0.1
UNITS
V
μA
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 LT3471E is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3: Current flows out of the pin.
Note 4: See Typical Performance Characteristics for guaranteed current
limit vs duty cycle.
Note 5: VCESAT is 100% tested at wafer level only.
TYPICAL PERFORMANCE CHARACTERISTICS
Quiescent Current
vs Temperature
2.6
VREF Voltage vs Temperature
1.010
VREF Voltage vs VREF Current
2.4
2.2
2.0
1.8
1.6
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3471 G01
SHDN/SS Current
vs SHDN/SS Voltage
VIN = 3.3V
SHDN/SS
CURRENT
20μV/DIV
VIN > VSHDN/SS
SHDN/SS VOLTAGE 1V/DIV
3471 G04
1.005
1.000
VREF
VOLTAGE
100mV/DIV
0.995
0.990
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3471 G02
Current Limit vs Duty Cycle
2.2
TA = 25°C
2.0
TYPICAL
1.8
1.6
1.4
GUARANTEED
1.2
1.0
0.8
0.6
0.4
0.2
0
0
20
40
60
80 100
DUTY CYCLE (%)
3471 G05
VREF CURRENT 200μA/DIV 3471 G03
Switch Saturation Voltage
vs Switch Current
800
700
600
90°C
500
25°C
400
300
200
100
0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
SW CURRENT (A)
3471 G06
3471fb
3
Share Link: 