TL431: Voltage Reference, Programmable Precision, Shunt Regulator

The TL431, A, B integrated circuits are three-terminal programmable shunt regulator diodes. These monolithic IC voltage references operate as a low temperature coefficient zener which is programmable from Vref to 36 V with two external resistors. These devices exhibit a wide operating current range of 1.0 mA to 100 mA with a typical dynamic impedance of 0.22 W. The characteristics of these references make them excellent replacements for zener diodes in many applications such as digital voltmeters, power supplies, and op amp circuitry. The 2.5 V reference makes it convenient to obtain a stable reference from 5.0 V logic supplies, and since the TL431, A, B operates as a shunt regulator, it can be used as either a positive or negative voltage reference.

Features
  • Programmable Output Voltage to 36 V
  • Voltage Reference Tolerance: +/- 0.4%, Typ @ 25°C (TL431B)
  • Low Dynamic Output Impedance, 0.22 W Typical
  • Sink Current Capability of 1.0 mA to 100 mA
  • Equivalent Full-Range Temperature Coefficient of 50 ppm/ °C Typical
  • Temperature Compensated for Operation over Full Rated Operating Temperature Range
  • Low Output Noise Voltage
  • Pb-Free Packages are Available
Tutorials (2)
Document TitleDocument ID/SizeRevisionRevision Date
FB1 - DC-DC Converters Feedback and ControlTND352/D (658.0kB)0Oct, 2008
FB2 - The TL431 in Switching Power SuppliesTND381/D (581.0kB)0Nov, 2009
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Programmable Precision ReferencesTL431/D (189kB)39Oct, 2016
Application Notes (6)
Document TitleDocument ID/SizeRevisionRevision Date
5.0 V, 2.0 A Flyback ConverterAND8099/D (204.0kB)2
A 70 W Low Standby Power Supply w/NCP120x SeriesAND8076/D (178.0kB)2
Isolated Precision Regulation of a Single 1.8 Volt Output from a Universal Line InputAND8031/D (120.0kB)1
Off-Line Critical Conduction Switching Power Supply with Voltage and Current LimitingAND8024/D (112kB)1Jan, 2016
Precision Sub-One Volt 1.7 Ampere Output LDOAND8028/D (38.0kB)0
Very Wide Input Voltage Range, Off-line Flyback Switching Power SupplyAN1327/D (326.0kB)2
Package Drawings (4)
Document TitleDocument ID/SizeRevision
8 LEAD PDIP626-05 (35.0kB)P
Micro 8 lead Surface Mount846A-02 (57.7kB)J
SOIC-8 Narrow Body751-07 (62.6kB)AK
TO-92 (TO-226) 5.33mm Body Height29-11 (61.7kB)A
Simulation Models (1)
Document TitleDocument ID/SizeRevisionRevision Date
PSPICE and ISPICE Models for TL431 Programmable ReferenceTL431 SPICE MODELS (24.0kB)1
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCV431AIDMR2GActiveAEC Qualified PPAP Capable Pb-free Halide freeMicro8™846A-021Tape and Reel4000$0.28
NCV431AIDR2GActiveAEC Qualified PPAP Capable Pb-free Halide freeSOIC-8751-071Tape and Reel2500$0.28
NCV431BVDMR2GActiveAEC Qualified PPAP Capable Pb-free Halide freeMicro8™846A-021Tape and Reel4000$0.336
NCV431BVDR2GActiveAEC Qualified PPAP Capable Pb-free Halide freeSOIC-8751-071Tape and Reel2500$0.336
TL431CDGActivePb-free Halide freeSOIC-8751-071Tube98$0.14
TL431CDMR2GActivePb-free Halide freeMicro8™846A-021Tape and Reel4000$0.0933
TL431CDR2GActivePb-free Halide freeSOIC-8751-071Tape and Reel2500$0.14
TL431CLPGActivePb-free Halide freeTO-9229-11NABulk Bag2000$0.112
TL431CLPRAGActivePb-free Halide freeTO-9229-11NATape and Reel2000$0.112
TL431CLPREGActive, Not RecPb-free Halide freeTO-9229-11NATape and Reel2000
TL431CLPRMGActive, Not RecPb-free Halide freeTO-9229-11NAFan-Fold2000
TL431CLPRPGActivePb-free Halide freeTO-9229-11NAFan-Fold2000$0.112
TL431CPGObsoletePb-free Halide freePDIP-8626-05NATube50
TL431IDGActivePb-free Halide freeSOIC-8751-071Tube98$0.0987
TL431IDMR2GActivePb-free Halide freeMicro8™846A-021Tape and Reel4000Contact BDTIC
TL431IDR2GActivePb-free Halide freeSOIC-8751-071Tape and Reel2500$0.0987
TL431ILPGActivePb-free Halide freeTO-9229-11NABulk Bag2000$0.1467
TL431ILPRAGActivePb-free Halide freeTO-9229-11NATape and Reel2000$0.1467
TL431ILPRPGActivePb-free Halide freeTO-9229-11NAFan-Fold2000$0.0987
TL431IPGObsoletePb-free Halide freePDIP-8626-05NATube50
Specifications
ProductTypeV(BR) Typ (V)Tolerance (%)IQ Typ (mA)IR Min (mA)VF Max (V)TA Min (°C)TA Max (°C)
NCV431AIDMR2GAdjustable2.49510.5136-40125
NCV431AIDR2GAdjustable2.49510.5136-40125
NCV431BVDMR2GAdjustable2.4950.40.5136-40125
NCV431BVDR2GAdjustable2.4950.40.5136-40125
TL431CDGAdjustable2.4952.2136070
TL431CDMR2GAdjustable2.4952.2136070
TL431CDR2GAdjustable2.4952.2136070
TL431CLPGAdjustable2.4952.2136070
TL431CLPRAGAdjustable2.4952.2136070
TL431CLPRPGAdjustable2.4952.2136070
TL431IDGAdjustable2.4952.2136-4085
TL431IDMR2GAdjustable2.4952.2136-4085
TL431IDR2GAdjustable2.4952.2136-4085
TL431ILPGAdjustable2.4952.2136-4085
TL431ILPRAGAdjustable2.4952.2136-4085
TL431ILPRPGAdjustable2.4952.2136-4085
Programmable Precision References (189kB) TL431B
FB1 - DC-DC Converters Feedback and Control TL431
FB2 - The TL431 in Switching Power Supplies TL431
5.0 V, 2.0 A Flyback Converter 1N5822
A 70 W Low Standby Power Supply w/NCP120x Series MUR160
Isolated Precision Regulation of a Single 1.8 Volt Output from a Universal Line Input 1N4005
Off-Line Critical Conduction Switching Power Supply with Voltage and Current Limiting NDF04N60Z
Precision Sub-One Volt 1.7 Ampere Output LDO MBT35200
Very Wide Input Voltage Range, Off-line Flyback Switching Power Supply MUR1100E
PSPICE and ISPICE Models for TL431 Programmable Reference TL431B
Micro 8 lead Surface Mount CM1216
SOIC-8 Narrow Body CM1216
TO-92 (TO-226) 5.33mm Body Height NCV33064
8 LEAD PDIP NE592
Products 产品服务
Manufacturers 生产厂家
Sales 联系购买
©1993 - 2024 BDTIC