TL431
Table 4.
Symbol
Electrical Characteristics
T
amb
= 25°C (unless otherwise specified)
TL431I
Parameter
Min.
Reference Input Voltage
Typ.
Max.
Min.
Typ.
Max.
TL431AI
Unit
V
ref
V
KA
= V
ref
, Ik = 10 mA, T
amb
= 25°C
T
min
≤T
amb
≤
T
max
Reference Input Voltage Deviation Over Temperature
Range
(1)
V
KA
= V
ref
, Ik =10 mA, T
min
≤T
amb
≤
T
max
Ratio of Change in Reference Input Voltage to Change
in Cathode to Anode Voltage
Ik = 10mA,
∆V
KA
= 10V to V
ref
∆V
KA
= 36V to 10V
Reference Input Current
Ik = 10mA, R1 = 10kΩ, R2 =
∞
T
amb
= 25°C
T
min
≤T
amb
≤T
max
Reference Input Current Deviation Over Temperature
Range
Ik = 10mA, R1 = 10kΩ, R2 =∞
T
min
≤T
amb
≤
T
max
Minimum Cathode Current for Regulation
V
KA
= V
ref
Off-State Cathode Current
Dynamic Impedance
(2)
V
KA
= V
ref
,
∆
Ik = 1 to100mA, f
≤1kHZ
2.44
2.41
2.49
5
2.55
2.58
2.47
2.44
2.49
5
2.52
2.55
V
∆V
ref
mV
7
30
7
30
∆Vref
------------
∆Vka
-1.4
-1
-2.7
-2
-1.4
-1
-2.7
-2
mV/V
Iref
1.8
4
6.5
1.8
4
6.5
µA
∆Iref
µA
0.8
2.5
0.8
1.2
mA
nA
Ω
Imin
Ioff
⏐ZKA⏐
0.5
2.6
1
1000
0.5
2.6
0.7
1000
0.22
0.5
0.22
0.5
1.
∆
V
ref
is defined as the difference between the maximum and minimum values obtained over the full temperature range.
∆
V
ref
= V
ref max.
- V
ref min.
V
ref max.
V
ref min.
T1
T2
Temperature
2. The dynamic Impedance is definied as
|
ZKA
|
=
∆VKA
----------------
-
∆IK
5/13
STMICROELECTRONICS [ STMICROELECTRONICS ]
