LT1431 Ver la hoja de datos (PDF) - Linear Technology
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LT1431 Datasheet PDF : 14 Pages
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LT1431
Electrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. IK = 10mA unless otherwise specified (Note 2)
LT1431I, LT1431M
LT1431C
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX MIN TYP MAX UNITS
VREF
Reference Voltage
VKA = 5V, IK = 2mA, (Note 3)
2.490 2.500 2.510 2.490 2.500 2.510
V
l 2.465
2.535 2.480
2.520
V
∆VREF/∆T Reference Drift
∆VREF/∆VKA Voltage Ratio, Reference to
Cathode (Open-Loop Gain)
VKA = 5V, IK = 2mA
IK = 2mA, VKA = 3V to 36V
l
50
l
0.2 0.5
30
ppm/°C
0.2 0.5 mV/V
|IREF|
Reference Input Current
VKA = 5V, TA = 25°C
0.2 1.0
l
1.5
0.2 1.0
µA
1.2
µA
IMIN
Minimum Operating Current
VKA = VREF to 36V
|IOFF|
Off-State Cathode Current
VKA = 36V, VREF = 0V
l
|ILEAK|
Off-State Collector Leakage Current VCOLL = 36V, V+ = 5V, VREF = 2.4V
l
0.6 1.0
1
15
1
5
0.6 1.0
mA
1
µA
2
µA
1
µA
2
µA
|ZKA|
Dynamic Impedance
ILIM
Collector Current Limit
5V Reference Output
VKA = VREF, IK = 1mA to 100mA, f ≤ 1kHz
0.2
0.2
Ω
VKA = VREF + 50mV
l 80
360 100
260
mA
Internal Divider Used, IK = 2mA
4.950 5.000 5.050 4.950 5.000 5.050
V
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: VKA is the cathode voltage of the LT1431CZ/IZ and corresponds
to V+ of the LT1431CN8/IN8/CS8/IS8. IK is the cathode current of the
LT1431CZ/IZ and corresponds to I(V+) + ICOLLECTOR of the LT1431CN8/
IN8/CS8/IS8.
Note 3: The LT1431 has bias current cancellation which is effective only
for VKA ≥ 3V. A slight (≈2mV) shift in reference voltage occurs when
VKA drops below 3V. For this reason, these tests are not performed at
VKA = VREF.
1431fd
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