TLV431, TLV431A, TLV431B
LOW VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR
SLVS139R − JULY 1996 − REVISED SEPTEMBER 2005
TLV431B electrical characteristics at 25°C free-air temperature (unless otherwise noted)
TLV431B
PARAMETER
TEST CONDITIONS
TA = 25°C
VREF
Reference voltage
VKA = VREF,
IK = 10 mA
TA = full range
(see Note 3 and
Figure 1)
TLV431BC
TLV431BI
TLV431BQ
TLV431BC
VREF(dev)
∆V
REF
∆V
KA
Iref
Iref(dev)
VREF deviation over full
temperature range (see Note 4)
VKA = VREF, IK = 10 mA
(see Note 3 and Figure 1)
TLV431BI
TLV431BQ
Ratio of VREF change in cathode
VKA = VREF to 6 V, IK = 10 mA (see Figure 2)
voltage change
Reference terminal current
Iref deviation over full
temperature range (see Note 4)
Minimum cathode current for
regulation
Off-state cathode current
Dynamic impedance
(see Note 5)
IK = 10 mA, R1 = 10 kΩ, R2 = open (see Figure 2)
TLV431BC
IK = 10 mA, R1 = 10 kΩ, R2 = open
TLV431BI
(see Note 3 and Figure 2)
TLV431BQ
VKA = VREF (see Figure 1)
VREF = 0, VKA = 6 V (see Figure 3)
VKA = VREF, f
≤
1 kHz,
IK = 0.1 mA to 15 mA (see Figure 1)
MIN
1.234
1.227
1.224
1.221
4
6
11
−1.5
0.1
0.05
0.1
0.15
55
0.001
0.25
TYP
1.24
MAX
1.246
1.253
1.259
1.265
12
20
31
−2.7
0.5
0.3
0.4
0.5
100
0.1
0.4
µA
µA
Ω
µA
mV/V
µA
mV
V
UNIT
IK(min)
IK(off)
|zKA|
NOTES: 3. Full temperature ranges are − 40°C to 125°C for TLV431BQ, − 40°C to 85°C for TLV431BI, and 0°C to 70°C for TLV431BC.
4. The deviation parameters VREF(dev) and Iref(dev) are defined as the differences between the maximum and minimum values
obtained over the rated temperature range. The average full-range temperature coefficient of the reference input voltage,
αV
REF,
is defined as:
V
REF(dev)
10 6
V
REF
(T
A
+25°C)
ppm
αV
REF
+
∆T
°C
A
where
∆T
A is the rated operating free-air temperature range of the device.
α
VREF can be positive or negative, depending on whether minimum VREF or maximum VREF, respectively, occurs at the
lower temperature.
∆V
KA
5. The dynamic impedance is defined as z ka
+
∆I
K
When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is defined
as:
z
+
∆V
[
z
1
)
R1
ka
ka
∆I
R2
8
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