TL431, A, B Series, NCV431A
ELECTRICAL CHARACTERISTICS
(T
A
= 25°C, unless otherwise noted.)
TL431AI / NCV431AI
Characteristic
Reference Input Voltage (Figure 1)
In ut
V
KA
= V
ref
, I
K
= 10 mA
T
A
= 25°C
25 C
T
A
= T
low
to T
high
t
Reference Input Voltage Deviation Over
Temperature Range (Figure 1, Notes 4, 5)
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 4)
Reference Input Current Deviation Over
Temperature Range (Figure 2, Note 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 6)
V
KA
= V
ref
,
DI
K
= 1.0 mA to 100 mA
f
≤
1.0 kHz
4. T
low
Symbol
V
ref
2.47
2 47
2.44
2 44
DV
ref
−
2.495
2 495
−
7.0
2.52
2 52
2.55
2 55
30
2.47
2 47
2.453
2 453
−
2.495
2 495
−
3.0
2.52
2 52
2.537
2 537
17
2.483
2 483
2.475
2 475
−
2.495
2 495
2.495
2 495
3.0
2.507
2 507
2.515
2 515
17
mV
Min
Typ
Max
Min
TL431AC
Typ
Max
TL431BI / TL431BV
Min
Typ
Max
Unit
V
DV
DV
ref
−
−
−1.4
−1.0
−2.7
−2.0
−
−
−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
−
−
−
1.1
−
0.8
2.0
4.0
2.5
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
−
−
−
0.5
0.23
0.14
1.0
500
0.3
mA
nA
W
= −40°C for TL431AIP TL431AILP, TL431IP, TL431ILP, TL431BID, TL431BIP, TL431BILP, TL431BV, TL431AIDM, TL431IDM,
TL431BIDM, NCV431AIDMR2, NCV431AIDR2
= 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
= +125°C TL431BV, NCV431AIDMR2, NCV431AIDR2
5. 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
V
ppm
+
ref
_C
V
ref
ref
@ 25_C
D
T
A
X 106
+
The average temperature coefficient of the reference input voltage,
aV
ref
is defined as:
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
6. The dynamic impedance Z
KA
is defined as
|Z KA|
+
When the device is programmed with two external resistors, R1 and R2, (refer
D
I
K
to Figure 2) the total dynamic impedance of the circuit is defined as:
|Z KA |
[
|Z KA| 1
)
R1
R2
7. NCV431AIDMR2, NCV431AIDR2 T
low
= −40°C, T
high
= +125°C. Guaranteed by design. NCV prefix is for automotive and other applications
requiring site and change control.
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