LT1619 データシートの表示（PDF） - Linear Technology
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LT1619 Datasheet PDF : 20 Pages
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LT1619
ELECTRICAL CHARACTERISTICS
The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
VIN = VDRV = 2.5V, VS/S = VIN, COMP open, VSENSE = 0V unless otherwise noted.
PARAMETER
Current Sense Input Current
Current Limit Delay
Driver Output Rise Time
Driver Output Fall Time
Driver Output High Level
Driver Output Low Level
Shutdown Driver Output Level
Idle Mode Driver Output Level
S/S Pin Current
Operating Supply Current
Quiescent Supply Current
Shutdown Supply Current
Shutdown Threshold
Shutdown Delay
CONDITIONS
VSENSE = 0V
CL = 3300pF
CL = 3300pF
IOUT = – 20mA
IOUT = – 200mA
IOUT = 20mA
IOUT = 200mA
VS/S = 0V, IOUT = 20mA
VS/S = VIN, VFB = 1.5V, IOUT = 20mA
VS/S = VIN
VS/S = 0V
VFB = 1V
VS/S = VIN, VFB = 1.5V
VS/S = 0V
VS/S = 0V, VIN = 18V, TA = 85°C
MIN
TYP
q
– 90
– 120
150
30
35
VDRV – 0.6
VDRV – 1.6
VDRV – 0.35
VDRV – 1.2
100
0.5
100
100
9
q
140
15
40
0.45
12
17
MAX
– 150
200
0.7
200
200
4
–2
220
19
1.2
33
UNITS
µA
ns
ns
ns
V
V
mV
V
mV
mV
µA
µA
mA
µA
µA
µA
V
µs
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: The LT1619E 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: TJ is calculated from the ambient temperature TA, the power
dissipation PD and the thermal resistance θJA of the package according to
the formula:
TJ = TA + PD • θJA
TYPICAL PERFOR A CE CHARACTERISTICS
Bandgap Voltage vs Temperature
1.245
VIN = 2.5V
1.243
1.241
1.239
1.237
1.235
1.233
1.231
1.229
1.227
1.225
–40 –20
0 20 40 60 80 100 120
TEMPERATURE (°C)
1619 G01
IS/S vs VS/S
5
4
3
2
TA = –40°C
TA = 25°C
TA = 85°C
1
0
–1
–2
–3
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VS/S (V)
1619 G02
S/S Pin Current vs Temperature
5
4
VS/S = 2.5V
3
2
1
0
–1
VS/S = 0V
–2
–3
–40 –20
0 20 40 60 80 100 120
TEMPERATURE (°C)
1619 G03
3
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