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TL431 Fiches technique(PDF) 4 Page - STMicroelectronics

No de pièce TL431
Description  Programmable voltage reference
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TL431 Fiches technique(HTML) 4 Page - STMicroelectronics

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Electrical characteristics
TL431
4/15
3
Electrical characteristics
Table 3.
Tamb = 25°C (unless otherwise specified)
Symbol
Parameter
TL431C
TL431AC
Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
Vref
Reference input voltage
VKA = Vref , Ik = 10 mA, Tamb = 25°C
Tmin ≤ Tamb ≤ Tmax
2.44
2.423
2.495
2.55
2.567
2.47
2.453
2.495
2.52
2.537
V
ΔVref
Reference input voltage deviation over temperature
range (1)
VKA = Vref, Ik = 10 mA, Tmin ≤ Tamb ≤ Tmax
317
3
15
mV
Ratio of change in reference input voltage to change
in cathode to anode voltage
Ik = 10mA - ΔVKA = 10V to Vref
ΔVKA = 36V to 10V
-2.7
-2
-1.4
-1
-2.7
-2
-1.4
-1
mV/V
Iref
Reference input current
Ik = 10mA, R1 = 10kΩ, R2 = ∞
Tamb = 25°C
Tmin ≤ Tamb ≤ Tmax
1.8
4
5.2
1.8
4
5.2
µA
ΔIref
Reference input current deviation over temperature
range
Ik = 10mA, R1 = 10kΩ, R2 =∞
Tmin ≤ Tamb ≤ Tmax
0.4
1.2
0.4
1.2
µA
Imin
Minimum cathode current for regulation
VKA = Vref
0.5
1
0.5
0.6
mA
Ioff
Off-state cathode current
2.6
1000
2.6
1000
nA
⏐ ZKA⏐
Dynamic impedance (2)
VKA = Vref , Δ Ik = 1 to100mA, f ≤ 1kHZ
0.22
0.5
0.22
0.5
Ω
1.
See definition of Reference input voltage deviation over temperature range.
2.
The dynamic impedance is defined as
| ZKA| =
ΔVref
ΔVka
------------
ΔV
KA
I
k
Δ
---------------


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