TL431AIL3T Datasheet, PDF (6/21 Pages) STMicroelectronics – Programmable voltage reference

Electrical characteristics
TL431, TL432
Table 4.
Symbol
TL431I/TL432I (T_amb = 25°C unless otherwise specified)
Parameter
TL431I/TL432I TL431AI/TL432AI
Unit
Min. Typ. Max. Min. Typ. Max.
Reference input voltage
V_ref
V_KA = V_ref, I_k = 10 mA, T_amb = 25° C
T_min ≤ T_amb ≤ T_max
2.44 2.495 2.55 2.47 2.495 2.52 V
2.41
2.58 2.44
2.55
ΔV_ref
Reference input voltage deviation over temperature
range ⁽¹⁾
V_KA = V_ref, I_k =10 mA, T_min≤ T_amb≤ T_max
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
I_k = 10 mA, ΔV_KA = 10 V to V_ref
ΔV_KA = 36 V to 10 V
-2.7 -1.4
-2 -1
-2.7 -1.4
-2 -1
mV/V
Reference input current
I_ref
I_k = 10 mA, R1 = 10 kΩ, R2 = ∞
T_amb = 25° C
T_min ≤ T_amb ≤ T_max
1.8 4
6.5
1.8
4
6.5
µA
Reference input current deviation over temperature
range
ΔI_ref
I_k = 10 mA, R1 = 10 kΩ, R2 = ∞
T_min ≤ T_amb ≤ T_max
0.8 2.5
0.8 1.2 µA
Minimum cathode current for regulation
I_min
V_KA = V_ref
0.5 1
0.5 0.7 mA
I_off
⏐ZKA⏐
Off-state cathode current
Dynamic impedance ⁽²⁾
V_KA = V_ref, Δ I_k = 1 to 100 mA, f ≤ 1 kHZ
2.6 1000
0.22 0.5
2.6 1000 nA
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| = ^Δ_-----V----^K_----^A_--
ΔI_k
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Doc ID 4467 Rev 11