TL431, A, B Series
ELECTRICAL CHARACTERISTICS
(TA = 25°C, unless otherwise noted.)
TL431AI
Characteristic
Ch
i i
Reference Input Voltage (Figure 1)
VKA = Vref, IK = 10 mA
TA = 25°C
TA = Tlow to Thigh
Reference Input Voltage Deviation Over
Temperature Range (Figure 1, Notes 1, 2)
VKA= Vref, IK = 10 mA
Ratio of Change in Reference Input Voltage
to Change in Cathode to Anode Voltage
IK = 10 mA (Figure 2),
∆V
KA = 10 V to Vref
∆V
KA = 36 V to 10 V
Reference Input Current (Figure 2)
IK = 10 mA, R1 = 10 k, R2 =
∞
TA = 25°C
TA = Tlow to Thigh (Note 1)
Reference Input Current Deviation Over
Temperature Range (Figure 2, Note 1)
IK = 10 mA, R1 = 10 k, R2 =
∞
Minimum Cathode Current For Regulation
VKA = Vref (Figure 1)
Off–State Cathode Current (Figure 3)
VKA = 36 V, Vref = 0 V
Dynamic Impedance (Figure 1, Note 3)
VKA = Vref,
∆I
K = 1.0 mA to 100 mA
f
≤
1.0 kHz
Symbol
S b l
Vref
2.47
2.44
∆V
ref
–
2.495
–
7.0
2.52
2.55
–
2.47
2.453
–
2.495
–
3.0
2.52
2.537
–
2.483
2.475
–
2.495
2.495
3.0
2.507
2.515
–
mV
Min
Typ
Max
Min
TL431AC
Typ
Max
Min
TL431B
Typ
Max
Unit
V
D
Vref
D
VKA
–
–
∆I
ref
–
–
∆I
ref
–
1.8
–
0.8
4.0
6.5
2.5
–
–
–
1.8
–
0.4
4.0
5.2
1.2
–
–
–
1.1
–
0.4
2.0
4.0
1.2
–1.4
–1.0
–2.7
–2.0
–
–
–1.4
–1.0
–2.7
–2.0
–
–
–1.4
–1.0
–2.7
–2.0
mV/V
µA
µA
Imin
Ioff
|ZKA|
–
–
–
0.5
260
0.22
1.0
1000
0.5
–
–
–
0.5
260
0.22
1.0
1000
0.5
–
–
–
0.5
230
0.14
1.0
500
0.3
mA
nA
Ω
NOTES:
1. Tlow = –40°C for TL431AIP TL431AILP, TL431IP, TL431ILP, TL431BID, TL431BIP, TL431BILP, TL431AIDM, TL431IDM, TL431BIDM
= 0°C for TL431ACP, TL431ACLP, TL431CP, TL431CLP, TL431CD, TL431ACD, TL431BCD, TL431BCP, TL431BCLP, TL431CDM,
TL431ACDM, TL431BCDM
Thigh = +85°C for TL431AIP, TL431AILP, TL431IP, TL431ILP, TL431BID, TL431BIP, TL431BILP, TL431IDM, TL431AIDM, TL431BIDM
= +70°C for TL431ACP, TL431ACLP, TL431CP, TL431ACD, TL431BCD, TL431BCP, TL431BCLP, TL431CDM, TL431ACDM, TL431BCDM
2. The deviation parameter
∆V
ref is defined as the difference between the maximum and minimum values obtained over the full operating ambient
temperature range that applies.
Vref max
∆V
ref = Vref max
–Vref min
∆T
A = T2 – T1
Vref min
T1
T2
Ambient Temperature
The average temperature coefficient of the reference input voltage,
αV
ref is defined as:
D
Vref
V
ppm
ref
_
C
x 10 6
ref
D
TA
(V
@ 25
_
C)
A ref
αV
ref can be positive or negative depending on whether Vref Min or Vref Max occurs at the lower ambient temperature. (Refer to Figure 6.)
+
V
ref
@ 25
_
C
X 10 6
+
D
T
V
ref
D
V
Example :
D
V
+
8.0 mV and slope is positive,
V
@ 25
_
C
+
2.495 V,
D
T
+
70
_
C
ref
A
ref
a
3. The dynamic impedance ZKA is defined as |Z KA|
K
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:
|Z
KA
|
+
DD
VIKA
+
0.008 x 106
+
45.8 ppm
_
C
70 (2.495)
[
|ZKA|
1
)
R1
R2
4
MOTOROLA ANALOG IC DEVICE DATA
MOTOROLA [ MOTOROLA, INC ]
