TLV431A, TLV431B
ELECTRICAL CHARACTERISTICS
(T
A
= 25°C unless otherwise noted)
TLV431A
Characteristic
Reference Voltage (Figure 3)
(V
KA
= V
ref
, I
K
= 10 mA, T
A
= 25°C)
(T
A
= T
low
to T
high
, Note 1)
Reference Input Voltage Deviation Over Temperature (Figure 3)
(V
KA
= V
ref
, I
K
= 10 mA, T
A
= T
low
to T
high
, Note 1)
Ration of Reference Input Voltage Change to Cathode Voltage
Change (Figure 4)
(V
KA
= V
ref
to 16 V, I
K
= 10 mA)
Reference Terminal Current (Figure 4)
(I
K
= 10 mA, R1 = 10 kW, R2 = open)
Reference Input Current Deviation Over Temperature (Figure 4)
(I
K
= 10 mA, R1 = 10 kW, R2 = open, Notes 1, 2)
Minimum Cathode Current for Regulation (Figure 3)
Off−State Cathode Current (Figure 5)
(V
KA
= 6.0 V, V
ref
= 0)
(V
KA
= 16 V, V
ref
= 0)
Dynamic Impedance (Figure 3)
(V
KA
= V
ref
, I
K
=0.1 mA to 20 mA, f
≤
1.0 kHz, Note 3)
Symbol
V
ref
Min
1.228
1.215
−
Typ
1.240
−
7.2
Max
1.252
1.265
20
Min
1.234
1.228
−
TLV431B
Typ
1.240
−
7.2
Max
1.246
1.252
20
Unit
V
DV
ref
mV
DV
ref
DV
KA
I
ref
DI
ref
I
K(min
)
I
K(off)
−
−
−
−
−
−
−
−0.6
0.15
0.04
55
0.01
0.012
0.25
−1.5
0.3
0.08
80
0.04
0.05
0.4
−
−
−
−
−
−
−
−0.6
0.15
0.04
55
0.01
0.012
0.25
−1.5
0.3
0.08
80
0.04
0.05
0.4
mV
V
mA
mA
mA
mA
|Z
KA
|
W
1. Ambient temperature range: T
low
=
*40°C,
T
high
= 85°C.
2. The deviation parameters
DV
ref
and
DI
ref
are defined as the difference between the maximum value and minimum value obtained over the
full operating ambient temperature range that applied.
V
ref
Max
DV
ref
= V
ref
Max
−
V
ref
Min
V
ref
Min
T
1
Ambient Temperature
T
2
DT
A
= T
2
−
T
1
The average temperature coefficient of the reference input voltage,
aV
ref
is defined as:
(DV )
ref
V
(T
+
25°C)
ref A
DT
A
10
6
αV
ref
ppm
+
°C
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 8.
Example:
Example:
Example:
DV
ref
= 7.2 mV and the slope is positive,
V
ref
@ 25°C = 1.241 V
DT
A
= 125°C
0.0072
ppm
+
1.241
αV
ref
°C
125
3. The dynamic impedance Z
KA
is defined as:
Z
DV
KA
+
KA
DI
K
10
6
+
46 ppm
°C
When the device is operating with two external resistors, R1 and R2, (refer to Figure 4) the total dynamic impedance of the circuit is given by:
Z
KA
′
+
Z
KA
1
)
R1
R2
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