431C View Datasheet(PDF) - STMicroelectronics
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431C Datasheet PDF : 15 Pages
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TL431
Electrical characteristics
Table 4.
Symbol
Tamb = 25°C (unless otherwise specified)
Parameter
TL431I
TL431AI
Unit
Min. Typ. Max. Min. Typ. Max.
Reference input voltage
Vref
VKA = Vref , Ik = 10 mA, Tamb = 25°C
Tmin ≤ Tamb ≤ Tmax
2.44 2.495 2.55 2.47 2.495 2.52 V
2.41
2.58 2.44
2.55
ΔVref
Reference input voltage deviation over temperature
range (1)
VKA = Vref , Ik =10 mA, Tmin≤ Tamb≤ Tmax
7 30
7 30 mV
Δ----V---r--e---f
ΔVka
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 -1.4
-2 -1
-2.7 -1.4
-2 -1
mV/V
Reference input current
Iref
Ik = 10mA, R1 = 10kΩ, R2 = ∞
Tamb = 25°C
Tmin ≤ Tamb ≤Tmax
1.8 4
6.5
1.8
4
6.5
µA
Reference input current deviation over temperature
range
ΔIref
Ik = 10mA, R1 = 10kΩ, R2 = ∞
Tmin ≤ Tamb ≤ Tmax
0.8 2.5
0.8 1.2 µA
Minimum cathode current for regulation
Imin
VKA = Vref
0.5 1
0.5 0.7 mA
Ioff
⏐ ZKA⏐
Off-state cathode current
Dynamic impedance (2)
VKA = Vref , Δ Ik = 1 to100mA, f ≤ 1kHZ
2.6 1000
0.22 0.5
2.6 1000 nA
0.22 0.5 Ω
1. See definition of Reference input voltage deviation over temperature range below.
2. The dynamic impedance is defined as | ZKA| = Δ----Δ-V---I-K-k---A--
Reference input voltage deviation over temperature range
ΔVref is defined as the difference between the maximum and minimum values obtained over
the full temperature range.
ΔVref = Vref max - Vref min
Figure 4. Reference input voltage deviation over temperature range
V ref max.
V ref min.
T1
T2
Temperature
5/15
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