TL431, A, B Series, NCV431A
ELECTRICAL CHARACTERISTICS
(T
A
= 25°C, unless otherwise noted.)
TL431I
Characteristic
Reference Input Voltage (Figure 1)
V
KA
= V
ref
, I
K
= 10 mA
T
A
= 25°C
T
A
= T
low
to T
high
(Note 1)
High Logic Level Supply Current from V
CC
Reference Input Voltage Deviation Over
Temperature Range (Figure 1, Notes 1, 2)
V
KA
= V
ref,
I
K
= 10 mA
Ratio of Change in Reference Input Voltage to Change
in Cathode to Anode Voltage
I
K
= 10 mA (Figure 2),
DV
KA
= 10 V to V
ref
DV
KA
= 36 V to 10 V
Reference Input Current (Figure 2)
I
K
= 10 mA, R1 = 10 k, R2 =
∞
T
A
= 25°C
T
A
= T
low
to T
high
(Note 1)
Reference Input Current Deviation Over
Temperature Range (Figure 2, Note 1, 4)
I
K
= 10 mA, R1 = 10 k, R2 =
∞
Minimum Cathode Current For Regulation
V
KA
= V
ref
(Figure 1)
Off−State Cathode Current (Figure 3)
V
KA
= 36 V, V
ref
= 0 V
Dynamic Impedance (Figure 1, Note 3)
V
KA
= V
ref
,
DI
K
= 1.0 mA to 100 mA
f
≤
1.0 kHz
1. T
low
Symbol
V
ref
2.44
2.41
I
CCH
DV
ref
60
−
2.495
−
−
7.0
2.55
2.58
45
30
2.44
2.423
60
−
2.495
−
mA
3.0
2.55
2.567
mA
17
mA
mV
Min
Typ
Max
Min
TL431C
Typ
Max
Unit
V
DV
DV
ref
−
−
−1.4
−1.0
−2.7
−2.0
−
−
−1.4
−1.0
−2.7
−2.0
mV/V
KA
I
ref
−
−
DI
ref
−
1.8
−
0.8
4.0
6.5
2.5
−
−
−
1.8
−
0.4
4.0
5.2
1.2
mA
mA
I
min
I
off
|Z
KA
|
−
−
−
0.5
20
0.22
1.0
1000
0.5
−
−
−
0.5
20
0.22
1.0
1000
0.5
mA
nA
W
= −40°C for TL431AIP TL431AILP, TL431IP, TL431ILP, TL431BID, TL431BIP, TL431BILP, TL431AIDM, TL431IDM, TL431BIDM;
= 0°C for TL431ACP, TL431ACLP, TL431CP, TL431CLP, TL431CD, TL431ACD, TL431BCD, TL431BCP, TL431BCLP, TL431CDM,
TL431ACDM, TL431BCDM
T
high
= +85°C for TL431AIP, TL431AILP, TL431IP, TL431ILP, TL431BID, TL431BIP, TL431BILP, TL431IDM, TL431AIDM, TL431BIDM
= +70°C for TL431ACP, TL431ACLP, TL431CP, TL431ACD, TL431BCD, TL431BCP, TL431BCLP, TL431CDM, TL431ACDM,
TL431BCDM
2. The deviation parameter
DV
ref
is defined as the difference between the maximum and minimum values obtained over the full operating
ambient temperature range that applies.
V
ref
max
DV
ref
= V
ref
max
−V
ref
min
DT
A
= T
2
− T
1
V
ref
min
T1
T2
Ambient Temperature
D
V
The average temperature coefficient of the reference input voltage,
aV
ref
is defined as:
V
ppm
+
ref
_C
V
ref
ref
@ 25_C
D
T
A
X 106
+
x 10 6
ref
D
T (V @ 25_C)
A ref
D
V
aV
ref
can be positive or negative depending on whether V
ref
Min or V
ref
Max occurs at the lower ambient temperature. (Refer to Figure 6.)
Example :
DV
V
ref
+
8.0 mV and slope is positive,
@ 25_C
+
2.495 V,
DT
+
70_C
A
D
V
a
V
ref
+
0.008 x 106
+
45.8 ppm
_C
70 (2.495)
ref
KA
3. The dynamic impedance Z
KA
is defined as:
|Z KA|
+
. When the device is programmed with two external resistors, R1 and R2,
D
I
K
(refer to Figure 2) the total dynamic impedance of the circuit is defined as:
|Z KA |
[
|Z KA| 1
)
R1
R2
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