TL431/TL431A
Electrical Characteristics
(T
A
= +25°C, unless otherwise specified)
Parameter
Reference Input Voltage
Deviation of Reference
Input Voltage Over-
Temperature (Note 1)
Ratio of Change in
Reference Input Voltage
to the Change in
Cathode Voltage
Reference Input Current
Deviation of Reference
Input Current Over Full
Temperature Range
Minimum Cathode Cur-
rent for Regulation
Off - Stage Cathode
Current
Dynamic Impedance
(Note 2)
Symbol
V
REF
ΔV
REF
/
ΔT
Conditions
V
KA
=V
REF
, I
KA
=10mA
V
KA
=V
REF
, I
KA
=10mA
T
MIN
≤T
A
≤T
MAX
ΔV
KA
=10V-
V
REF
ΔV
KA
=36V-
10V
TL431
Min.
Typ.
2.440 2.495
-
4.5
TL431A
Max. Min. Typ. Max.
2.550 2.470 2.495 2.520
17
-
4.5
17
Unit
V
mV
ΔV
REF
/
ΔV
KA
I
KA
=10mA
-
-
-
- 1.0
-0.5
1.5
-2.7
-2.0
4
-
-
-
-1.0
-0.5
1.5
-2.7
mV/V
-2.0
4
μA
μA
I
REF
ΔI
REF
/ΔT
I
KA(MIN)
I
KA(OFF)
Z
KA
I
KA
=10mA,
R
1
=10KΩ,R
2
=∞
I
KA
=10mA,
R
1
=10KΩ,R
2
=∞
T
A
=Full Range
V
KA
=V
REF
V
KA
=36V, V
REF
=0
V
KA
=V
REF
,
I
KA
=1 to 100mA
f
≥1.0KHz
-
0.4
1.2
-
0.4
1.2
-
-
0.45
0.05
1.0
1.0
-
-
0.45
0.05
1.0
1.0
mA
μA
Ω
-
0.15
0.5
-
0.15
0.5
• T
MIN
= -25
°C,
T
MAX
= +85
°C
3
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
