TL431
RECOMMENDED OPERATING CONDITIONS
Characteristic
Cathode Voltage
Cathode Current
Symbol
Test Condition
Min
Typ
Max
Unit
VKA
IK
VREF
0.5
40
V
100
mA
ELECTRICAL CHARACTERISTICS
(Ta = 25oC, VKA = VREF, IK = 10mA unless otherwise specified)
Characteristic
Symbol
Test Condition
Min
Typ
Max
Unit
Reference Input Voltage
VREF
VKA = VREF, IK = 10mA
2.440
2.470
2.482
2.495
2.495
2.495
2.550
2.520
2.508
TL431 (2%)
V
TL431-A (1%)
TL431-C (0.5%)
Deviation of Reference Input
Voltage Over Full Temperature
Range
VREF(dev)
Tmin ≤ Ta ≤ Tmax
3
17
MV
Ratio of Change in Reference Input
Voltage to the Change in Cathode
Voltage
ΔVREF
ΔVK A
-1.4
-2.7
ΔVKA = 10V-VREF
mV/V
-1.0
1.8
-2.0
4
ΔVKA = 36V- 10V
Reference Input Current
IREF
R1 = 10KΩ, R2 = ∞
㎂
㎂
Deviation of Reference Input
Current Over Full Temperature
Range
IREF(dev)
0.4
1.2
R1 = 10KΩ, R2 = ∞
Minimum Cathode Current for
Regulation
IK(min)
0.25
0.5
mA
Off-State Cathode Current
Dynamic Impedance
IK(off)
ZKA
VKA = 40 V, VREF = 0
0.26
0.22
0.9
0.5
㎂
IK = 10mA to 100 mA , f ≤ 1.0KHz
Ω
TEST CIRCUITS
Figure 1. Test Circuit for VKA = VREF
Figure 2. Test Circuit for VKA ≥ VREF
Figure 3. Test Circuit for I off
INPUT
V
KA
I
K(OFF)
TL431
TL431
BT432
TL431
Rev. 00
IKSEMICON [ IK SEMICON CO., LTD ]
