TL431 - Programmable Precision References

1 Semiconductor Components Industries, LLC, 1995 October, 2016 Rev. 391 Publication Order Number: TL431 /DTL431A, B Series,NCV431A, B Series,SCV431 AProgrammable Precision ReferencesThe TL431A, B integrated circuits are three terminalprogrammable shunt regulator diodes. These monolithic IC voltagereferences operate as a low temperature coefficient zener which isprogrammable from Vref to 36 V with two external resistors. Thesedevices exhibit a wide operating current range of mA to 100 mAwith a typical dynamic impedance of W. The characteristics ofthese References make them excellent replacements for zener diodes inmany applications such as digital voltmeters, power supplies, and opamp circuitry.

2 The V reference makes it convenient to obtain astable reference from V logic supplies, and since the TL431A, Boperates as a shunt regulator, it can be used as either a positive ornegative voltage Programmable Output Voltage to 36 V Voltage reference Tolerance: , Typ @ 25 C (TL431B) Low Dynamic Output Impedance, W Typical Sink Current Capability of mA to 100 mA Equivalent Full Range Temperature Coefficient of 50 ppm/ C Typical Temperature Compensated for Operation over Full Rated OperatingTemperature Range Low Output Noise Voltage NCV/SCV Prefixes for Automotive and Other ApplicationsRequiring Unique Site and Control Change Requirements;AEC Q100 Qualified and PPAP Capable These Devices are Pb Free, Halogen Free/BFR Free and are RoHSCompliant(Top View)31 ReferenceN/CN/CN/C248765N/CAnodeN/CCatho deAnodeAnodeTO 92 (TO 226)LP SUFFIXCASE 29 PDIP 8P SUFFIXCASE 626 SOIC 8D SUFFIXCASE 751 Pin 1.

3 Reference2. Anode3. Cathode(Top View)31 ReferenceN/C248765N/CCathodeMicro8 EDM SUFFIXCASE 846A8181123 This is an internally modified SOIC 8 package. Pins 2, 3, 6 and7 are electrically common to the die attach flag. This internallead frame modification increases power dissipation capabilitywhen appropriately mounted on a printed circuit board. Thismodified package conforms to all external dimensions of thestandard SOIC 8 detailed ordering and shipping information on page 13 ofthis data INFORMATIONSee general marking information in the device markingsection on page 14 of this data MARKING , B Series, NCV431A, B Series, kCathode(K) VrefAnode (A) reference (R) k150 Figure 1. Symbol10 k20 pF800 Cathode (K) kAnode (A)-+Anode(A)800 reference (R) k20 pF800 Cathode(K) reference (R)This device contains 12 active 2.

4 Representative Block DiagramFigure 3. Representative Schematic DiagramComponent values are nominalMAXIMUM RATINGS (Full operating ambient temperature range applies, unless otherwise noted.)RatingSymbolValueUnitCathode to Anode VoltageVKA37 VCathode Current Range, ContinuousIK 100 to +150mAReference Input Current Range, ContinuousIref to +10mAOperating Junction TemperatureTJ150 COperating Ambient Temperature RangeTA CTL431I, TL431AI, TL431BI 40 to +85TL431C, TL431AC, TL431BC0 to +70 NCV431AI, NCV431B, TL431BV, SCV431AI 40 to +125 Storage Temperature RangeTstg 65 to +150 CTotal Power Dissipation @ TA = 25 CPDWD erate above 25 C Ambient TemperatureD, LP Suffix Plastic Suffix Plastic Suffix Plastic Power Dissipation @ TC = 25 CPDWD erate above 25 C Case TemperatureD, LP Suffix Plastic Suffix Plastic Rating (Note 1)

5 Human Body Model per JEDEC JESD22 A114 FMachine Model per JEDEC JESD22 A115 CCharged Device Model per JEDEC JESD22 C101 EHBMMMCDM>2000>200>500 VStresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionalityshould not be assumed, damage may occur and reliability may be This device contains latch up protection and exceeds 100 mA per JEDEC standard OPERATING CONDITIONSC onditionSymbolMinMaxUnitCathode to Anode VoltageVKAVref36 VCathode operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyondthe Recommended Operating Ranges limits may affect device , B Series, NCV431A, B Series, CHARACTERISTICSC haracteristicSymbolD, LP SuffixPackageP SuffixPackageDM SuffixPackageUnitThermal Resistance, Junction to AmbientRqJA178114240 C/WThermal Resistance, Junction to CaseRqJC8341 C/WELECTRICAL CHARACTERISTICS (TA = 25 C, unless otherwise noted.)

6 CharacteristicSymbolTL431 ITL431 CUnitMinTypMaxMinTypMaxReference Input Voltage (Figure 1)VKA = Vref, IK = 10 mATA = 25 CTA = Tlow to Thigh (Note 2) Input Voltage Deviation OverTemperature Range (Figure 1, Notes 3, 4)VKA= Vref, IK = 10 mADVref of Change in reference Input Voltage to Changein Cathode to Anode VoltageIK = 10 mA (Figure 2),DVKA = 10 V to VrefDVKA = 36 V to 10 VDVrefDVKA Input Current (Figure 2)IK = 10 mA, R1 = 10 k, R2 = TA = 25 CTA = Tlow to Thigh (Note 2)Iref Input Current Deviation OverTemperature Range (Figure 2, Note 3)IK = 10 mA, R1 = 10 k, R2 = DIref Cathode Current For RegulationVKA = Vref (Figure 1)Imin State Cathode Current (Figure 3)VKA = 36 V, Vref = 0 VIoff 201000 201000nADynamic Impedance (Figure 1, Note 5)VKA = Vref, DIK = mA to 100 mA, f kHz|ZKA| parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted.

7 Productperformance may not be indicated by the Electrical Characteristics if operated under different Tlow= 40 C for TL431 AIP TL431 AILP, TL431IP, TL431 ILP, TL431 BID, TL431 BIP, TL431 BILP, TL431 AIDM, TL431 IDM, TL431 BIDM;=0 C for TL431 ACP, TL431 ACLP, TL431CP, TL431 CLP, TL431CD, TL431 ACD, TL431 BCD, TL431 BCP, TL431 BCLP, TL431 CDM, TL431 ACDM, TL431 BCDMT high= +85 C for TL431 AIP, TL431 AILP, TL431IP, TL431 ILP, TL431 BID, TL431 BIP, TL431 BILP, TL431 IDM, TL431 AIDM, TL431 BIDM= +70 C for TL431 ACP, TL431 ACLP, TL431CP, TL431 ACD, TL431 BCD, TL431 BCP, TL431 BCLP, TL431 CDM, TL431 ACDM, TL431 BCDM3. Guaranteed by The deviation parameter DVref is defined as the difference between the maximum and minimum values obtained over the full operatingambient temperature range that = Vref max -Vref minDTA = T2 - T1T2 Ambient TemperatureT1 Vref minVref maxThe average temperature coefficient of the reference input voltage, aVref is defined as:Vrefppm_C+ DVrefVref@25_C X106 DTA+DVrefx106 DTA(Vref@25_C)aVref can be positive or negative depending on whether Vref Min or Vref Max occurs at the lower ambient temperature.

8 (Refer to Figure 6.)Example :DVref+ mV and slope is V,DTA+70_CaVref+ x 10670 ( )+ ppm _C5. The dynamic impedance ZKA is defined as: |ZKA|+DVKADIK. When the device is programmed with two external resistors, R1 and R2, (refer to Figure 2) the total dynamic impedance of the circuit is defined as: |ZKA |[|ZKA| 1)R1R2 TL431A, B Series, NCV431A, B Series, CHARACTERISTICS (TA = 25 C, unless otherwise noted.)CharacteristicSymbolTL431AI / NCV431AI/SCV431 AITL431 ACTL431BC / TL431BI /TL431BV /NCV431 BVUnitMinTypMaxMinTypMaxMinTypMaxReferen ce Input Voltage (Figure 1)VKA = Vref, IK = 10 mATA = 25 CTA = Tlow to Thigh (Note 6) Input Voltage Deviation OverTemperature Range (Figure 1, Notes 7, 8)VKA= Vref, IK = 10 mADVref of Change in reference Input Voltage toChange in Cathode to Anode VoltageIK = 10 mA (Figure 2),DVKA = 10 V to VrefDVKA = 36 V to 10 VDVrefDVKA Input Current (Figure 2)IK = 10 mA, R1 = 10 k, R2 = TA = 25 CTA = Tlow to Thigh (Note 6)Iref Input Current Deviation OverTemperature Range (Figure 2, Note 7)]

9 IK = 10 mA, R1 = 10 k, R2 = DIref Cathode Current For RegulationVKA = Vref (Figure 1)Imin State Cathode Current (Figure 3)VKA = 36 V, Vref = 0 VIoff 201000 201000 Impedance (Figure 1, Note 9)VKA = Vref, DIK = mA to 100 mAf kHz|ZKA| parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Productperformance may not be indicated by the Electrical Characteristics if operated under different Tlow= 40 C for TL431 AIP TL431 AILP, TL431IP, TL431 ILP, TL431 BID, TL431 BIP, TL431 BILP, TL431BV, TL431 AIDM, TL431 IDM, TL431 BIDM, NCV431 AIDMR2G, NCV431 AIDR2G, NCV431 BVDR2G, SCV431 AIDMR2G=0 C for TL431 ACP, TL431 ACLP, TL431CP, TL431 CLP, TL431CD, TL431 ACD, TL431 BCD, TL431 BCP, TL431 BCLP, TL431 CDM, TL431 ACDM, TL431 BCDM, SCV431 AIDMR2 GThigh= +85 C for TL431 AIP, TL431 AILP, TL431IP, TL431 ILP, TL431 BID, TL431 BIP, TL431 BILP, TL431 IDM, TL431 AIDM, TL431 BIDM= +70 C for TL431 ACP, TL431 ACLP, TL431CP, TL431 ACD, TL431 BCD, TL431 BCP, TL431 BCLP, TL431 CDM, TL431 ACDM.

10 TL431 BCDM= +125 C TL431BV, NCV431 AIDMR2G, NCV431 AIDR2G, NCV431 BVDMR2G, NCV431 BVDR2G, SCV431 AIDMR2G7. Guaranteed by The deviation parameter DVref is defined as the difference between the maximum and minimum values obtained over the full operatingambient temperature range that = Vref max -Vref minDTA = T2 - T1T2 Ambient TemperatureT1 Vref minVref maxThe average temperature coefficient of the reference input voltage, aVref is defined as:Vrefppm_C+ DVrefVref@25_C X106 DTA+DVrefx106 DTA(Vref@25_C)aVref can be positive or negative depending on whether Vref Min or Vref Max occurs at the lower ambient temperature. (Refer to Figure 6.)Example :DVref+ mV and slope is V,DTA+70_CaVref+ x 10670 ( )+ ppm _C9.