TLV431, NCV431, SCV431
www.onsemi.com
6
ELECTRICAL CHARACTERISTICS (T
A
= 25°C unless otherwise noted. NCV prefix indicates TSOP package device. SCV prefix
indicates SOT−23 package device.)
Characteristic
Symbol
NCV431B, SCV431B
Uni
Min Typ Max
Reference Voltage (Figure 3)
(V
KA
= V
ref
, I
K
= 10 mA, T
A
= 25°C)
(T
A
= *40°C to 85°C)
(T
A
= *40°C to 125°C)
V
ref
1.234
1.228
1.224
1.240
−
−
1.246
1.252
1.252
V
Reference Input Voltage Deviation Over Temperature (Figure 3)
(V
KA
= V
ref
, I
K
= 10 mA, T
A
= *40°C to 85°C, Notes 9, 10)
(V
KA
= V
ref
, I
K
= 10 mA, T
A
= *40°C to 125°C, Notes 9, 10)
DV
ref
−
−
7.2
7.2
20
24
mV
Ration of Reference Input Voltage Change to Cathode Voltage Change (Figure 4)
(V
KA
= V
ref
to 16 V, I
K
= 10 mA)
DV
ref
DV
KA
− −0.6 −1.5
mV
V
Reference Terminal Current (Figure 4)
(I
K
= 10 mA, R1 = 10 kW, R2 = open)
I
ref
− 0.15 0.3
mA
Reference Input Current Deviation Over Temperature (Figure 4)
(I
K
= 10 mA, R1 = 10 kW, R2 = open, T
A
= *40°C to 85°C, Notes 12, 13)
(I
K
= 10 mA, R1 = 10 kW, R2 = open, T
A
= *40°C to 125°C, Notes 12, 13)
DI
ref
−
−
0.04
−
0.08
0.10
mA
Minimum Cathode Current for Regulation (Figure 3) I
K(min
) − 30 80
mA
Off−State Cathode Current (Figure 5)
(V
KA
= 6.0 V, V
ref
= 0)
(V
KA
= 16 V, V
ref
= 0)
I
K(off)
−
−
0.01
0.012
0.04
0.05
mA
Dynamic Impedance (Figure 3)
(V
KA
= V
ref
, I
K
=0.1 mA to 20 mA, f ≤ 1.0 kHz, Note 14)
|Z
KA
|
− 0.25 0.4
W
12.Guaranteed but not tested.
13.The deviation parameters DV
ref
and DI
ref
are defined as the difference between the maximum value and minimum value obtained over the
full operating ambient temperature range that applied.
V
ref
Max
V
ref
Min
T
1
T
2
Ambient Temperature
DV
ref
= V
ref
Max − V
ref
Min
DT
A
= T
2
− T
1
The average temperature coefficient of the reference input voltage, aV
ref
is defined as:
αV
ref
ǒ
ppm
°C
Ǔ
+
ǒ
(DV
ref
)
V
ref
(T
A
+ 25°C)
10
6
Ǔ
DT
A
aV
ref
can be positive or negative depending on whether V
ref
Min or V
ref
Max occurs at the lower ambient temperature, refer to Figure 8.
Example: DV
ref
= 7.2 mV and the slope is positive,
Example: V
ref
@ 25°C = 1.241 V
Example: DT
A
= 125°C
αV
ref
ǒ
ppm
°C
Ǔ
+
0.0072
1.241
125
+ 46 ppmń°C
10
6
14.The dynamic impedance Z
KA
is defined as:
⏐Z
KA
⏐ +
DV
KA
DI
K
When the device is operating with two external resistors, R1 and R2, (refer to Figure 4) the total dynamic impedance of the circuit is given by:
⏐Z
KA
′⏐ + ⏐Z
KA
⏐
ǒ
1 )
R1
R2
Ǔ
