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| LM431BCZXA Datasheet, PDF (3/11 Pages) Fairchild Semiconductor – Programmable Shunt Regulator | |||
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Electrical Characteristics
Values are at TA = 25°C unless otherwise noted.
Symbol Parameter
Conditions
LM431A
LM431B
LM431C
Unit
Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.
VREF
Reference VKA = VREF,
Input Voltage IKA = 10 mA
2.450 2.500 2.550 2.470 2.495 2.520 2.482 2.495 2.508 V
Deviation of
ÎVREF/
ÎT
Reference
Input Voltage
Over-
Temperature
VKA = VREF,
IKA =10 mA
TMIN ⤠TA ⤠TMAX(1)
4.5 17.0
4.5 17.0
4.5 17.0 mV
ÎVREF/
ÎVKA
Ratio of
Change in
Reference
Input Voltage
to the
Change in
Cathode
Voltage
IKA =
10 mA
ÎVKA =
10V-VREF
ÎVKA =
36V-10V
-1.0 -2.7
-0.5 -2.0
-1.0 -2.7
-0.5 -2.0
-1.0 -2.7
mV / V
-0.5 -2.0
IREF
Reference IKA = 10 mA,
Input Current R1 =10 kΩ, R2 = â
1.5 4.0
1.5 4.0
1.5 4.0 μA
ÎIREF /
ÎT
Deviation of
Reference
Input Current
Over Full
Temperature
Range
IKA = 10 mA,
R1 = 10 kΩ, R2 = â
TA = Full Range
0.4 1.2
0.4 1.2
0.4 1.2 μA
IKA(MIN)
Minimum
Cathode
Cur-rent for
Regulation
VKA = VREF
0.45 1.00
0.45 1.00
0.45 1.00 mA
IKA(OFF)
Off - Stage
Cathode
Current
VKA = 36 V,
VREF = 0
0.05 1.00
0.05 1.00
0.05 1.00 μA
Dynamic
VKA = VREF,
ZKA Impedance IKA =1 to 100 mA
f ⥠1.0 kHz
0.15 0.50
0.15 0.50
0.15 0.50 Ω
Note:
1. LM431xC: TMIN = -25°C, TMAX = +85°C.
LM431xI: TMIN = -40°C, TMAX = +85°C.
© 2003 Fairchild Semiconductor Corporation
LM431A / LM431B / LM431C Rev. 1.2.0
3
www.fairchildsemi.com
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