Datasheet

TL431, TL432 Electrical characteristics
Doc ID 4467 Rev 11 7/21
3.1 Reference input voltage deviation over temperature range
Δ V
ref
is defined as the difference between the maximum and minimum values obtained over
the full temperature range.
Δ V
ref
= V
ref max
- V
ref min
Figure 6. Reference input voltage deviation over temperature range
Table 5. TL431IY (T
amb
= 25°C unless otherwise specified)
Symbol Parameter
TL431IY TL431AIY
Unit
Min. Typ. Max. Min. Typ. Max.
V
ref
Reference input voltage
V
KA
= V
ref
, I
k
= 10 mA
T
min
≤ T
amb
≤ T
max
2.44
2.41
2.495 2.55
2.58
2.47
2.44
2.495 2.52
2.55
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
730 730mV
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
I
k
= 10 mA, 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
min
≤ T
amb
≤ T
max
1.8 4
6.5
1.8 4
6.5
µA
ΔI
ref
Reference input current deviation over temperature
range
I
k
= 10 mA, R1 = 10 kΩ, R2 = ∞, T
min
≤ T
amb
≤
T
max
0.8 2.5 0.8 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
T
min
≤ T
amb
≤ T
max
2.6 1000
3000
2.6 1000
3000
nA
⏐ZKA⏐
Dynamic impedance
(2)
V
KA
= V
ref
, Δ I
k
= 1 to 100 mA, F ≤ 1kHz
0.22 0.5 0.22 0.5 Ω
1. See definition of Section 3.1: Reference input voltage deviation over temperature range below.
2. The dynamic impedance is defined as
|ZKA| =
ΔVref
ΔVka
------------
ΔV
KA
I
k
Δ
----------------