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TS431-Z Datasheet(PDF) 2 Page - Taiwan Semiconductor Company, Ltd |
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TS431-Z Datasheet(HTML) 2 Page - Taiwan Semiconductor Company, Ltd |
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2 / 10 page  TS431-Z Adjustable Precision Shunt Regulator 2/10 Version: B11 Electrical Characteristics (TA=25 oC, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Reference voltage TS431A VREF VKA =VREF, IK =10mA (Figure 1) 2.470 2.495 2.520 V TS431B 2.483 2.507 Deviation of reference input voltage ∆ VREF VKA = VREF, IK =10mA (Figure 1) TA=-20~85 oC -- 6 20 mV Radio of change in Vref to change in cathode Voltage ∆VREF /∆VKA IKA =10mA, (Figure 2) VKA = 10V to VREF -- -1.2 -2.0 mV/V VKA = 36V to 10V -- -1.0 -2.0 Reference Input current IREF R1=10K , R2= ∞ , I KA =10mA (Figure 2) -- 1.5 3.5 uA Deviation of reference input current, over temp. ∆IREF R1=10K , R2= ∞ , I KA =10mA TA=-20~85 oC (Figure 2) -- 0.4 1.2 uA Off-state Cathode Current IKA (off) VREF =0V (Figure 3), VKA =36V -- 0.1 1.0 uA Dynamic Output Impedance | ZKA | f<1KHz, VKA = VREF (Figure 1) -- 0.2 0.5 Minimum operating cathode current IKA (min) VKA = VREF (Figure 1) -- 0.2 0.5 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, αV REF is defined as: Where: T2-T1 = full temperature change. α VREF can be positive or negative depending on whether the slope is positive or negative. Example: Maximum VREF=2.496V at 30 oC, minimum V REF =2.492V at 0 oC, V REF =2.495V at 25 oC, ∆T=70oC α VREF | = [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 | = ∆VKA / ∆IKA * 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 | = ∆v / ∆i | ≈ ZKA | * ( 1 + R1 / R2) |
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