Datasheet
Ť
aV
REF
Ť
ǒ
ppm
o
C
Ǔ
+
ǒ
V
REF(dev)
V
REF
(T
A
+25
o
C)
Ǔ
10
6
DT
A
Ť
z
KA
Ť
+
∆V
KA
∆I
K
Ť
z
KA
Ť
+
∆V
∆I
[
Ť
z
KA
Ť
ǒ
1 )
R1
R2
Ǔ
DV
REF
DV
KA
TLVH431, TLVH431A, TLVH431B
TLVH432, TLVH432A, TLVH432B
SLVS555I –NOVEMBER 2004–REVISED SEPTEMBER 2009.......................................................................................................................................
www.ti.com
TLVH43xB ELECTRICAL CHARACTERISTICS
at 25°C free-air temperature (unless otherwise noted)
TLVH431B
TLVH432B
PARAMETER TEST CONDITIONS UNIT
MIN TYP MAX
T
A
= 25°C 1.234 1.24 1.246
TLVH431BC 1.227 1.253
V
KA
= V
REF
,
V
REF
Reference voltage V
T
A
= full range,
I
K
= 10 mA
TLVH431BI 1.224 1.259
See Figure 1
(1)
TLVH431BQ 1.221 1.265
TLVH431BC 4 12
V
REF
deviation over full
V
REF(dev)
V
KA
= V
REF
, I
K
= 10 mA, See Figure 1
(1)
TLVH431BI 6 20 mV
temperature range
(2)
TLVH431BQ 11 31
Ratio of V
REF
change to
I
K
= 10 mA, V
K
= V
REF
to 18 V, See Figure 2 –1.5 –2.7 mV/V
cathode voltage change
I
ref
Reference terminal current I
K
= 10 mA, R1 = 10 kΩ, R2 = open, See Figure 2 0.1 0.5 μA
TLVH431BC 0.05 0.3
I
ref
deviation over full I
K
= 10 mA, R1 = 10 kΩ, R2 = open,
I
ref(dev)
TLVH431BI 0.1 0.4 μA
temperature range
(2)
See Figure 2
(1)
TLVH431BQ 0.15 0.5
Minimum cathode current
I
K(min)
V
KA
= V
REF
, See Figure 1 60 100 μA
for regulation
I
K(off)
Off-state cathode current V
REF
= 0, V
KA
= 18 V, See Figure 3 0.02 0.1 μA
|z
KA
| Dynamic impedance
(3)
V
KA
= V
REF
, f ≤ 1 kHz, I
K
= 0.1 mA to 70 mA, See Figure 1 0.25 0.4 Ω
(1) Full temperature ranges are –40°C to 125°C for TLVH431Q, –40°C to 85°C for TLVH431I, and 0°C to 70°C for TLVH431C.
(2) 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:
where ΔT
A
is the rated operating free-air temperature range of the device.
αV
REF
can be positive or negative, depending on whether minimum V
REF
or maximum V
REF
, respectively, occurs at the lower
temperature.
(3) The dynamic impedance is defined as:
When the device is operating with two external resistors (see Figure 2 ), the total dynamic impedance of the circuit is defined as:
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