TLV431AQDBVR Datasheet, PDF (7/42 Pages) Texas Instruments – LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR

TLV431, TLV431A, TLV431B
LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR
SLVS139T − JULY 1996 − REVISED JUNE 2007
TLV431A electrical characteristics at 25°C free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TLV431A
UNIT
MIN TYP MAX
V_REF
Reference voltage
V_KA = V_REF,
I_K = 10 mA
T_A = 25°C
T_A = full range
(see Note 3 and
Figure 1)
TLV431AC
TLV431AI
TLV431AQ
1.228 1.24 1.252
1.221
1.215
1.259
V
1.265
1.209
1.271
V_REF(dev)
V_REF deviation over full
V_KA = V_REF, I_K = 10 mA
temperature range (see Note 4) (see Note 3 and Figure 1)
TLV431AC
TLV431AI
TLV431AQ
4
12
6
20 mV
11
31
∆V_REF
∆V_KA
I_ref
I_ref(dev)
Ratio of V_REF change in cathode
voltage change
V_KA = V_REF to 6 V, I_K = 10 mA (see Figure 2)
Reference terminal current
I_ref deviation over full
temperature range (see Note 4)
I_K = 10 mA, R1 = 10 kΩ, R2 = open (see Figure 2)
I_K = 10 mA, R1 = 10 kΩ, R2 = open
(see Note 3 and Figure 2)
TLV431AC
TLV431AI
TLV431AQ
−1.5 −2.7 mV/V
0.15 0.5 µA
0.05 0.3
0.1 0.4 µA
0.15 0.5
I_K(min)
Minimum cathode current for
regulation
V_KA = V_REF (see Figure 1)
TLV431AC/AI
TLV431AQ
55
80
µA
55 100
I_K(off)
|z_KA|
Off-state cathode current
Dynamic impedance
(see Note 5)
V_REF = 0, V_KA = 6 V (see Figure 3)
V_KA = V_REF, f ≤ 1 kHz,
I_K = 0.1 mA to 15 mA (see Figure 1)
0.001
0.25
0.1 µA
0.4 Ω
NOTES: 3. Full temperature ranges are − 40°C to 125°C for TLV431AQ, − 40°C to 85°C for TLV431AI, and 0°C to 70°C for TLV431AC.
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:
ǒ Ǔ ^VREF(dev)
ǒ Ǔ ŤαV_REFŤ
ppm
°C
+
V_REF (T_A+25°C)
∆TA
106
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.
Ť Ť _5.
The dynamic impedance is defined as
zka
+
∆VKA
∆IK
When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is defined
as:
ǒ Ǔ ^Ťzka^Ť
Ȁ
+
∆V
∆I
[
Ť_zkaŤ
1
)
R1
R2
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