Datasheet

TLV431, TLV431A, TLV431B
LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR
SLVS139T − JULY 1996 − REVISED JUNE 2007
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TLV431B electrical characteristics at 25°C free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TLV431B
UNIT
PARAMETER TEST CONDITIONS
MIN TYP MAX
UNIT
T
A
= 25°C 1.234 1.24 1.246
V
Reference voltage
V
KA
= V
REF
,
T
A
=
full range
TLV431BC 1.227 1.253
V
V
REF
Reference voltage
V
KA
=
V
REF
,
I
K
= 10 mA
T
A
=
full
range
(see Note 3 and
TLV431BI 1.224 1.259
V
(see
Note
3
and
Figure 1)
TLV431BQ 1.221 1.265
V d i ti f ll
V V I 10 A
TLV431BC 4 12
V
REF
(
dev
)
V
REF
deviation over full
temperature range (see Note 4)
V
KA
= V
REF
, I
K
= 10 mA
(see Note 3 and Figure 1)
TLV431BI 6 20
mV
V
REF(dev)
t
empera
t
ure range
(
see
N
o
t
e
4)
(
see
N
o
t
e
3
an
d
Fi
gure
1)
TLV431BQ 11 31
mV
∆V
REF
∆V
KA
Ratio of V
REF
change in cathode
voltage change
V
KA
= V
REF
to 6 V, I
K
= 10 mA (see Figure 2) −1.5 −2.7
mV/V
I
ref
Reference terminal current I
K
= 10 mA, R1 = 10 kΩ, R2 = open (see Figure 2) 0.1 0.5 µA
I d i ti f ll
I 10 A R1 10 kΩ R2
TLV431BC 0.05 0.3
I
ref
(
dev
)
I
ref
deviation over full
temperature range (see Note 4)
I
K
= 10 mA, R1 = 10 kΩ, R2 = open
(see Note 3 and Figure 2)
TLV431BI 0.1 0.4
µA
I
ref(dev)
t
empera
t
ure range
(
see
N
o
t
e
4)
(
see
N
o
t
e
3
an
d
Fi
gure
2)
TLV431BQ 0.15 0.5
µA
I
K(min)
Minimum cathode current for
regulation
V
KA
= V
REF
(see Figure 1) 55 100 µA
I
K(off)
Off-state cathode current V
REF
= 0, V
KA
= 6 V (see Figure 3) 0.001 0.1 µA
|z
KA
|
Dynamic impedance
(see Note 5)
V
KA
= V
REF
, f ≤ 1 kHz,
I
K
= 0.1 mA to 15 mA (see Figure 1)
0.25 0.4 Ω
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 V
REF(dev)
and I
ref(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:
Ť
αV
REF
Ť
ǒ
ppm
°C
Ǔ
+
ǒ
V
REF(dev)
V
REF
(T
A
+25°C)
Ǔ
10
6
∆T
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 V
REF
or maximum V
REF
, respectively, occurs at the
lower temperature.
5. The dynamic impedance is defined as
Ť
z
ka
Ť
+
∆V
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:
Ť
z
ka
Ť
Ȁ+
∆V
∆I
[
Ť
z
ka
Ť
ǒ
1 )
R1
R2
Ǔ