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TS1431 Datasheet(PDF) 2 Page - Taiwan Semiconductor Company, Ltd

Part No. TS1431
Description  Adjustable Precision Shunt Regulator
Download  10 Pages
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Maker  TSC [Taiwan Semiconductor Company, Ltd]
Homepage  http://www.taiwansemi.com
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TS1431 Datasheet(HTML) 2 Page - Taiwan Semiconductor Company, Ltd

 
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TS1431
Adjustable Precision Shunt Regulator
2/10
Version: D14
Recommended Operating Condition
Parameter
Symbol
Limit
Unit
Cathode Voltage
(Note 1)
VKA
Ref ~ 36
V
Continuous Cathode Current Range
IK
1 ~ 100
mA
Electrical Characteristics
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Reference voltage
TS1431A
VREF
VKA =VREF, IK =10mA (Figure 1)
TA=25
oC
2.475
2.495
2.525
V
TS1431B
2.487
2.513
Deviation of reference input
voltage
∆ VREF
VKA = VREF, IK =10mA (Figure 1)
TA= full range
--
3
17
mV
Radio of change in Vref to
change in cathode Voltage
∆VREF /∆VKA
IKA =10mA, VKA = 10V to VREF
VKA = 36V to 10V (Figure 2)
--
--
-1.4
-1.0
-2.7
-2.0
mV/V
Reference Input current
IREF
R1=10KΩ, R2= , IKA =10mA
TA = full range (Figure 2)
--
0.7
4.0
µA
Deviation of reference input
current, over temp.
∆IREF
R1=10KΩ, R2= , IKA =10mA
TA = full range (Figure 2)
--
0.4
1.2
µA
Off-state Cathode Current
IKA (off)
VREF =0V (Figure 3),
VKA =36V
--
--
1.0
µA
Dynamic Output Impedance
| ZKA |
f<1KHz, VKA = VREF
IKA =1mA to 100mA (Figure 1)
--
0.22
0.5
Ω
Minimum operating cathode
current
IKA (min)
VKA = VREF (Figure 1)
--
0.4
0.6
mA
* The deviation parameters ∆VREF and ∆IREF 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, αVREF is defined as:
Where: T2-T1 = full temperature change.
αVREF can be positive or negative depending on whether the slope is positive or negative.
Example: Maximum VREF=2.496V at 30
oC, minimum VREF =2.492V at 0oC, VREF =2.495V at 25oC, ΔT=70oC
αVREF | = [4mV / 2495mV] * 10
6 / 70oC ≈ 23ppm/oC
Because minimum VREF occurs at the lower temperature, the coefficient is positive.
* The dynamic impedance ZKA is defined as:
| ZKA | = ΔVKA / ΔIKA
* 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:
| ZKA | = Δv / Δi | ≈ ZKA | * ( 1 + R1 / R2)


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