Data Sheet

KA431S / KA431SA / KA431SL — Programmable Shunt Regulator
© 2002 Fairchild Semiconductor Corporation www.fairchildsemi.com
KA431S / KA431SA / KA431SL Rev. 6.7 4
Electrical Characteristics
(5)
Values are at T
A
= 25°C unless otherwise noted.
Note:
5. T
MIN
= -25°C, T
MAX
= +85°C
Symbol Parameter Conditions
KA431S KA431SA KA431SL
Unit
Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.
V
REF
Reference Input
Voltage
V
KA
= V
REF
,
I
KA
= 10 mA
2.450 2.500 2.550 2.470 2.495 2.520 2.482 2.495 2.508 V
ΔV
REF
/ΔT
Deviation of
Reference
Input Voltage
Over-
Temperature
V
KA
= V
REF
,
I
KA
= 10 mA,
T
MIN
≤ T
A
≤ T
MAX
4.5 17.0 4.5 17.0 4.5 17.0 mV
ΔV
REF
/ΔV
KA
Ratio of Change in
Reference Input
Voltage
to the Change in
Cathode Voltage
I
KA
=
10 mA
ΔV
KA
=
10 V - V
REF
-1.0 -2.7 -1.0 -2.7 -1.0 -2.7
mV/V
ΔV
KA
=
36 V - 10 V
-0.5 -2.0 -0.5 -2.0 -0.5 -2.0
I
REF
Reference Input
Current
I
KA
= 10 mA,
R1 = 10 kΩ, R2 = ∞
1.5 4.0 1.5 4.0 1.5 4.0 μA
ΔI
REF
/ΔT
Deviation of
Reference
Input Current
Over Full
Temperature
Range
I
KA
= 10 mA,
R1 = 10 kΩ, R2 = ∞
T
A
= Full Range
0.4 1.2 0.4 1.2 0.4 1.2 μA
I
KA(MIN)
Minimum Cathode
Current for
Regulation
V
KA
= V
REF
0.45 1.00 0.45 1.00 0.45 1.00 mA
I
KA(OFF)
Off - Stage
Cathode
Current
V
KA
= 36 V,
V
REF
= 0
0.05 1.00 0.05 1.00 0.05 1.00 μA
Z
KA
Dynamic
Impedance
V
KA
= V
REF
,
I
KA
= 1 to 100 mA,
f ≥ 1.0 kHz
0.15 0.50 0.15 0.50 0.15 0.50 Ω