Datasheet

TL431, TL432 Electrical characteristics
Doc ID 4467 Rev 11 5/21
3 Electrical characteristics
Table 3. TL431C (T
amb
= 25° C unless otherwise specified)
Symbol Parameter
TL431C TL431AC
Unit
Min. Typ. Max. Min. Typ. Max.
V
ref
Reference input voltage
V
KA
= V
ref
, I
k
= 10 mA, T
amb
=25°C
T
min
≤ T
amb
≤ T
max
2.44
2.423
2.495 2.55
2.567
2.47
2.453
2.495 2.52
2.537
V
ΔV
ref
Reference input voltage deviation over temperature
range
(1)
V
KA
= V
ref
, I
k
= 10 mA, T
min
≤ T
amb
≤ T
max
317 315
mV
Ratio of change in reference input voltage to change
in cathode to anode voltage
I
k
= 10 mA - ΔV
KA
= 10 V to V
ref
ΔV
KA
= 36 V to 10 V
-2.7
-2
-1.4
-1
-2.7
-2
-1.4
-1
mV/V
I
ref
Reference input current
I
k
= 10 mA, R1 = 10 kΩ, R2 = ∞
T
amb
= 25° C
T
min
≤ T
amb
≤ T
max
1.8 4
5.2
1.8 4
5.2
µA
ΔI
ref
Reference input current deviation over temperature
range
I
k
= 10 mA, R1 = 10 kΩ, R2 =∞
T
min
≤ T
amb
≤ T
max
0.4 1.2 0.4 1.2
µA
I
min
Minimum cathode current for regulation
V
KA
= V
ref
0.5 1 0.5 0.6
mA
I
off
Off-state cathode current 2.6 1000 2.6 1000 nA
⏐ZKA⏐
Dynamic impedance
(2)
V
KA
= V
ref
, Δ I
k
= 1 to 100 mA, f ≤ 1 kHZ 0.22 0.5 0.22 0.5
Ω
1. See definition of Section 3.1: Reference input voltage deviation over temperature range .
2. The dynamic impedance is defined as
|ZKA| =
ΔVref
ΔVka
------------
ΔV
KA
I
k
Δ
----------------