TL431, A, B Series
ELECTRICAL CHARACTERISTICS (T = 25°C, unless otherwise noted.)
A
TL431AI
TL431AC
Typ
TL431B
Typ
Characteristic
Symbol Min
Typ
Max
Min
Max
Min
Max
Unit
Reference Input Voltage (Figure 1)
V
ref
V
V
KA
= V , I = 10 mA
ref
K
T
A
= 25°C
2.47 2.495 2.52 2.47 2.495 2.52 2.483 2.495 2.507
T
A
= T
to T
high
2.44
–
2.55 2.453
–
2.537 2.475 2.495 2.515
low
Reference Input Voltage Deviation Over
Temperature Range (Figure 1, Notes 1, 2)
∆V
ref
–
7.0
–
–
3.0
–
–
3.0
–
mV
V = V I = 10 mA
KA ref, K
Ratio of Change in Reference Input Voltage
to Change in Cathode to Anode Voltage
mV/V
V
ref
V
KA
I
K
= 10 mA (Figure 2),
∆V
∆V
= 10 V to V
= 36 V to 10 V
–
–
–1.4 –2.7
–1.0 –2.0
–
–
–1.4
–1.0
–2.7
–2.0
–
–
–1.4
–1.0
–2.7
–2.0
KA
KA
ref
Reference Input Current (Figure 2)
= 10 mA, R1 = 10 k, R2 = ∞
∆I
µA
µA
ref
I
K
T
A
= 25°C
–
–
1.8
–
4.0
6.5
–
–
1.8
–
4.0
5.2
–
–
1.1
–
2.0
4.0
T
A
= T
to T
(Note 1)
high
low
Reference Input Current Deviation Over
Temperature Range (Figure 2, Note 1)
∆I
ref
–
0.8
2.5
–
0.4
1.2
–
0.4
1.2
I
K
= 10 mA, R1 = 10 k, R2 = ∞
Minimum Cathode Current For Regulation
= V (Figure 1)
I
–
–
–
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
min
V
KA
ref
Off–State Cathode Current (Figure 3)
= 36 V, V = 0 V
I
off
V
KA
ref
Dynamic Impedance (Figure 1, Note 3)
= V , ∆I = 1.0 mA to 100 mA
|Z
|
KA
V
KA
ref
K
f ≤ 1.0 kHz
NOTES: 1. T
= –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
low
T
= +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
high
2. The deviation parameter ∆V is defined as the difference between the maximum and minimum values obtained over the full operating ambient
ref
temperature range that applies.
V
max
min
ref
∆
V
= V max
ref
ref
–V min
ref
T = T – T
A
∆
2
1
V
ref
T1
T2
Ambient Temperature
The average temperature coefficient of the reference input voltage, αV is defined as:
ref
V
ref
6
X 10
V
@ 25 C
6
V
x 10
ref
ppm
C
ref
(V
V
ref
T
A
T
@ 25 C)
A
ref
αV can be positive or negative depending on whether V Min or V Max occurs at the lower ambient temperature. (Refer to Figure 6.)
ref
ref
ref
Example :
V
V
8.0 mV and slope is positive,
ref
ref
6
0.008 x 10
70 (2.495)
@ 25 C
2.495 V,
T
70 C
V
45.8 ppm
C
A
ref
V
KA
3. The dynamic impedance Z
is defined as |Z
|
KA
KA
I
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:
R1
|Z
|
|Z
|
1
KA
KA
R2
4
MOTOROLA ANALOG IC DEVICE DATA
MOTOROLA [ MOTOROLA ]
