Electrical characteristics
TL431, TL432
Table 4.
Symbol
TL431I/TL432I (Tamb = 25°C unless otherwise specified)
TL431I/TL432I
TL431AI/TL432AI
Parameter
Unit
Min. Typ. Max. Min. Typ. Max.
Reference input voltage
Vref
VKA = Vref, Ik = 10 mA, Tamb = 25° C
2.44 2.495 2.55 2.47 2.495 2.52
V
Tmin ≤ Tamb ≤ Tmax
2.41
2.58 2.44
2.55
Reference input voltage deviation over temperature
range (1)
ΔVref
7
30
7
30
mV
mV/V
µA
VKA = Vref, Ik =10 mA, Tmin≤ Tamb≤ Tmax
Ratio of change in reference input voltage to change
in cathode to anode voltage
ΔVref
------------
ΔVka
Ik = 10 mA, ΔVKA = 10 V to Vref
ΔVKA = 36 V to 10 V
-2.7 -1.4
-2.7 -1.4
-2
-1
-2
-1
Reference input current
Ik = 10 mA, R1 = 10 kΩ, R2 = ∞
Tamb = 25° C
Tmin ≤ Tamb ≤ Tmax
Iref
1.8
4
6.5
1.8
4
6.5
Reference input current deviation over temperature
range
ΔIref
Ik = 10 mA, R1 = 10 kΩ, R2 = ∞
Tmin ≤ Tamb ≤ Tmax
0.8
0.5
2.5
1
0.8
0.5
1.2
0.7
µA
Minimum cathode current for regulation
VKA = Vref
Imin
Ioff
mA
Off-state cathode current
2.6 1000
0.22 0.5
2.6 1000 nA
0.22 0.5
Dynamic impedance (2)
⏐ZKA⏐
Ω
VKA = Vref, Δ Ik = 1 to 100 mA, f ≤ 1 kHZ
1. See definition of Section 3.1: Reference input voltage deviation over temperature range below.
ΔV
KA
2. The dynamic impedance is defined as |ZKA| =
---------------
ΔIk
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Doc ID 4467 Rev 11
STMICROELECTRONICS [ ST ]
