TL431, TL432
3
Electrical characteristics
Electrical characteristics
Symbol
Table 3. TL431C (Tamb = 25 °C unless otherwise specified)
Parameter
TL431C
TL431AC
Unit
Min. Typ. Max. Min. Typ. Max.
Vref
Vref
----VV---r-k-e--a-f
Reference input voltage
VKA = Vref, Ik = 10 mA, Tamb = 25 °C
Tmin Tamb Tmax
Reference input voltage deviation overtemperature
range (1)
VKA = Vref, Ik = 10 mA, Tmin Tamb Tmax
2.44 2.495 2.55 2.47 2.495 2.52 V
2.423 - 2.567 2.453 - 2.537
mV
-
3
17
-
3 15
Ratio of change in reference input voltage to change
in cathode to anode voltage
Ik = 10 mA - VKA = 10 V to Vref
VKA = 36 V to 10 V
-2.7 -1.4
-
-2.7 -1.4
- mV/V
-2 -1
-
-2 -1
-
Reference input current
Iref
Ik = 10 mA, R1 = 10 k, R2 =
Tamb = 25 °C
Tmin Tamb Tmax
- 1.8 4
-
1.8
4
µA
-
- 5.2 -
- 5.2
Reference input current deviation overtemperature
Iref
range
Ik = 10 mA, R1 = 10 k, R2 =
Tmin Tamb Tmax
µA
- 0.4 1.2 - 0.4 1.2
Imin
Ioff
ZKA
Minimum cathode current for regulation
VKA = Vref
Off-state cathode current
Dynamic impedance(2)
VKA = Vref, Ik = 1 to 100 mA, f 1 kHZ
-
0.5
1
-
0.5 0.6 mA
- 2.6 1000 - 2.6 1000 nA
- 0.22 0.5
- 0.22 0.5
1. See definition of Section : Reference input voltage deviation overtemperature range.
2. The dynamic impedance is defined as ZKA= -----V---I-K-k---A--
DocID4467 Rev 12
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