TS1431_08 Datasheet, PDF (2/10 Pages) Taiwan Semiconductor Company, Ltd – Adjustable Precision Shunt Regulator

TS1431
Adjustable Precision Shunt Regulator
Recommend Operating Condition
Parameter
Cathode Voltage (Note 1)
Continuous Cathode Current Range
Symbol
V_KA
I_K
Limit
Ref ~ 36
1 ~ 100
Unit
V
mA
Recommend Operating Condition
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Reference voltage
TS1431
TS1431A
TS1431B
V_REF
2.450
2.550
V_KA =V_REF, I_K =10mA (Figure 1)
Ta=25^oC
2.475 2.495 2.525
V
2.487
2.513
Deviation of reference input
voltage
∆ V_REF
V_KA = V_REF, I_K =10mA (Figure 1)
Ta= full range
--
3
17
mV
Radio of change in Vref to
change in cathode Voltage
Reference Input current
∆V_REF /∆V_KA
I_REF
I_KA =10mA, V_KA = 10V to V_REF
V_KA = 36V to 10V (Figure 2)
R1=10KΩ, R2= ∞ , I_KA =10mA
Ta= full range (Figure 2)
--
--
-1.4
-1.0
-2.7
-2.0
mV/V
--
0.7
4.0
uA
Deviation of reference input
current, over temp.
∆I_REF
R1=10KΩ, R2= ∞ , I_KA =10mA
Ta= full range (Figure 2)
--
0.4
1.2
uA
Off-state Cathode Current
Dynamic Output Impedance
Minimum operating cathode
current
I_KA (off)
| Z_KA |
I_KA (min)
V_REF =0V (Figure 3),
V_KA =36V
f<1KHz, V_KA = V_REF
I_KA =1mA to 100mA (Figure 1)
V_KA = V_REF (Figure 1)
--
--
1.0
uA
--
0.22 0.5
Ω
--
0.4
0.6
mA
* The deviation parameters ∆V_REF and ∆I_REF are defined as difference between the maximum value and minimum value
obtained over the full operating ambient temperature range that applied.
* The average temperature coefficient of the
reference input voltage, αV_REF is defined as:
Where: T2-T1 = full temperature change.
αV_REF can be positive or negative depending on whether the slope is positive or negative.
Example: Maximum V_REF=2.496V at 30^oC, minimum V_REF =2.492V at 0^oC, V_REF =2.495V at 25^oC, ΔT=70^oC
αV_REF | = [4mV / 2495mV] * 10⁶ / 70^oC ≈ 23ppm/^oC
Because minimum V_REF occurs at the lower temperature, the coefficient is positive.
* The dynamic impedance ZKA is defined as:
| Z_KA | = ΔV_KA / ΔI_KA
* When the device operating with two external resistors, R1 and R2, (refer to Figure 2) the total dynamic impedance of
the circuit is given by:
| Z_KA | = Δv / Δi | ≈ Z_KA | * ( 1 + R1 / R2)
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Version: C07