TL431B Datasheet, PDF (2/6 Pages) Texas Instruments – ADJUSTABLE PRECISION SHUNT REGULATORS

Typical Characteristics
Parameter
Reference input voltage (Fig.1)
Deviation of reference input voltage
over temperature (note) (Fig.1)
Ratio of change in reference input
voltage to the change in cathode
voltage (Fig.2)
Reference input current (Fig.2)
Deviation Of reference input current
over full temperature range (Fig.2)
Minimum cathode current for
regulation (Fig.1)
Off-state cathode Current (Fig.3)
Dynamic impedance
Note: T_MIN=-25℃ ,T_MAX=+85℃
Symbol
V_ref
△V_ref /△T
△V_ref /△V_KA
l_ref
△l_ref /△T
Test conditions
V_KA=V_REF, I_KA=10mA
V_KA =V_REF, I_KA =10mA
T_MIN≤T_a≤T_MAX
△V_KA
I_KA=10mA
=10V~V_REF
△V_KA
=36V~ 10V
I_KA= 10mA,R₁=10kΩ
R₂=∞
l_KA=10mA, R₁=10kΩ
R₂=∞
T_A= full range
Min
2.470
I_KA(min)
V_KA=V_REF
I_KA(OFF)
Z_KA
V_KA=36V,V_REF=0
V_KA=V_REF, l_KA=0.2 to 100mA
f≤1.0kHz
Typ
2.49 5
8
-1.0
-0.4
0.5
0.4
0.08
0.01
0.1
Max
2.520
17
-2.7
-2.0
1.2
1.2
0.3
0.8
0.37
Unit
V
mV
mV/V
mV/V
μA
μA
mA
μA
Ω
CLASSIFICATION RI Vref
Rank
Range
 0.5%
2.483-2.508
1%
2.470-2.520
Figure 1. Test Circuit for VKA = Vref
Input
IK ^VKA
Vref
Figure 2. Test Circuit for VKA > Vref
Figure 3. Test Circuit for Ioff
Input
VKA
Input
IK
R1 Iref
R2
Vref
ǒ Ǔ + ) ) V_KA
V_ref
1
R1
R2
I_ref S R1
Ioff ^VKA
High Diode Semiconductor
2