TL431Z
ELECTRICAL CHARACTERISTICS
(T
a
= 25
o
C, V
KA
= V
REF
, I
K
= 10mA unless otherwise specified)
Characteristic
Reference Input Voltage
Symbol
V
REF
Test Condition
V
KA
= V
REF
, I
K
= 10mA
TL431Z (2%)
TL431Z-A (1%)
TL431Z-C (0.5%)
Deviation of Reference Input
Voltage Over Full
Temperature Range
Ratio of Change in
Reference Input Voltage to
the Change in Cathode
Voltage
Reference Input Current
Deviation of Reference Input
Current Over Full
Temperature Range
Minimum Cathode Current
for Regulation
Off-State Cathode Current
Dynamic Impedance
V
REF(dev)
T
min
≤
Ta
≤
T
max
2.440
2.470
2.482
2.495
2.495
2.495
3
-1.4
-1.0
1.8
0.4
2.550
2.520
2.508
17
-2.7
-2.0
4
1.2
mV/V
㎂
㎂
MV
V
Min
Typ
Max
Unit
∆
V
REF
∆
V
K A
∆V
KA
= 10V-V
REF
∆V
KA
= 36V- 10V
I
REF
I
REF(dev)
R
1
= 10KΩ, R
2
=
∞
R
1
= 10KΩ, R
2
=
∞
I
K(min)
I
K(off)
Z
KA
V
KA
= 40 V, V
REF
= 0
I
K
= 10mA to 100 mA , f
≤
1.0KHz
0.25
0.17
0.27
0.5
0.9
0.5
mA
㎂
Ω
Note :
1. The deviation parameter
∆Vref
is defined as the difference between the maximum and minimum values obtained over
the full operating ambient temperature range that applies
The average temperature coefficient of the reference input voltage, aVref is defined as:
αVref
can be positive or negative depending on whether Vref Min or Vref Max occurs at the lower ambient temperature.
(Refer to Figure 6.)
2. The dynamic impedance ZKA is defined as
When the device is programmed with two external resistors, R1 and R2, (refer to Figure 2) the total dynamic impedance
of the circuit is defined as:
Rev. 01
IKSEMICON [ IK SEMICON CO., LTD ]
