Datasheet TL431, TL431A, TL431B, TL432, TL432A, TL432B (Texas Instruments)
| Manufacturer | Texas Instruments |
| Description | TL43xx Precision Programmable Reference |
| Pages / Page | 78 / 1 — TL431. , TL431A,. TL431B. TL432. , TL432A,. TL432B. TL43xx Precision … |
| Revision | O |
| File Format / Size | PDF / 2.9 Mb |
| Document Language | English |
TL431. , TL431A,. TL431B. TL432. , TL432A,. TL432B. TL43xx Precision Programmable Reference. 1 Features. 3 Description. 2 Applications
Model Line for this Datasheet
TL431A
Text Version of Document
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TL431 , TL431A, TL431B TL432 , TL432A, TL432B
SLVS543O – AUGUST 2004 – REVISED JANUARY 2015
TL43xx Precision Programmable Reference 1 Features 3 Description
The TL431 and TL432 devices are three-terminal • Reference Voltage Tolerance at 25°C 1 adjustable shunt regulators, with specified thermal – 0.5% (B Grade) stability over applicable automotive, commercial, and – 1% (A Grade) military temperature ranges. The output voltage can be set to any value between Vref (approximately – 2% (Standard Grade) 2.5 V) and 36 V, with two external resistors. These • Adjustable Output Voltage: Vref to 36 V devices have a typical output impedance of 0.2 Ω. • Operation From −40°C to 125°C Active output circuitry provides a very sharp turn-on • Typical Temperature Drift (TL431B) characteristic, making these devices excellent replacements for Zener diodes in many applications, – 6 mV (C Temp) such as onboard regulation, adjustable power – 14 mV (I Temp, Q Temp) supplies, and switching power supplies. The TL432 • Low Output Noise device has exactly the same functionality and electrical specifications as the TL431 device, but has • 0.2-Ω Typical Output Impedance different pinouts for the DBV, DBZ, and PK packages. • Sink-Current Capability: 1 mA to 100 mA Both the TL431 and TL432 devices are offered in • three grades, with initial tolerances (at 25°C) of 0.5%,
2 Applications
1%, and 2%, for the B, A, and standard grade, • Adjustable Voltage and Current Referencing respectively. In addition, low output drift versus temperature ensures good stability over the entire • Secondary Side Regulation in Flyback SMPSs temperature range. • Zener Replacement The TL43xxC devices are characterized for operation • Voltage Monitoring from 0°C to 70°C, the TL43xxI devices are • Comparator with Integrated Reference characterized for operation from –40°C to 85°C, and the TL43xxQ devices are characterized for operation from –40°C to 125°C.
Device Information(1) PART NUMBER PACKAGE (PIN) BODY SIZE (NOM)
SOT-23-3 (3) 2.90 mm x 1.30 mm SOT-23-5 (5) 2.90 mm x 1.60 mm TL43xx SOIC (8) 4.90 mm x 3.90 mm PDIP (8) 9.50 mm x 6.35 mm SOP (8) 6.20 mm x 5.30 mm (1) For all available packages, see the orderable addendum at the end of the data sheet.
4 Simplified Schematic
Input VKA IKA Vref 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. Document Outline 1 Features 2 Applications 3 Description 4 Simplified Schematic Table of Contents 5 Revision History 6 Pin Configuration and Functions 7 Specifications 7.1 Absolute Maximum Ratings 7.2 ESD Ratings 7.3 Thermal Information 7.4 Recommended Operating Conditions 7.5 Electrical Characteristics, TL431C, TL432C 7.6 Electrical Characteristics, TL431I, TL432I 7.7 Electrical Characteristics, TL431Q, TL432Q 7.8 Electrical Characteristics, TL431AC, TL432AC 7.9 Electrical Characteristics, TL431AI, TL432AI 7.10 Electrical Characteristics, TL431AQ, TL432AQ 7.11 Electrical Characteristics, TL431BC, TL432BC 7.12 Electrical Characteristics, TL431BI, TL432BI 7.13 Electrical Characteristics, TL431BQ, TL432BQ 7.14 Typical Characteristics 8 Parameter Measurement Information 9 Detailed Description 9.1 Overview 9.2 Functional Block Diagram 9.3 Feature Description 9.4 Device Functional Modes 9.4.1 Open Loop (Comparator) 9.4.2 Closed Loop 10 Applications and Implementation 10.1 Application Information 10.2 Typical Applications 10.2.1 Comparator With Integrated Reference 10.2.1.1 Design Requirements 10.2.1.2 Detailed Design Procedure 10.2.1.3 Application Curves 10.2.2 Shunt Regulator/Reference 10.2.2.1 Design Requirements 10.2.2.2 Detailed Design Procedure 10.2.2.3 Application Curves 10.3 System Examples 11 Power Supply Recommendations 12 Layout 12.1 Layout Guidelines 12.2 Layout Example 13 Device and Documentation Support 13.1 Related Links 13.2 Trademarks 13.3 Electrostatic Discharge Caution 13.4 Glossary 14 Mechanical, Packaging, and Orderable Information
TL431 , TL431A, TL431B TL432 , TL432A, TL432B
SLVS543O – AUGUST 2004 – REVISED JANUARY 2015
TL43xx Precision Programmable Reference 1 Features 3 Description
The TL431 and TL432 devices are three-terminal • Reference Voltage Tolerance at 25°C 1 adjustable shunt regulators, with specified thermal – 0.5% (B Grade) stability over applicable automotive, commercial, and – 1% (A Grade) military temperature ranges. The output voltage can be set to any value between Vref (approximately – 2% (Standard Grade) 2.5 V) and 36 V, with two external resistors. These • Adjustable Output Voltage: Vref to 36 V devices have a typical output impedance of 0.2 Ω. • Operation From −40°C to 125°C Active output circuitry provides a very sharp turn-on • Typical Temperature Drift (TL431B) characteristic, making these devices excellent replacements for Zener diodes in many applications, – 6 mV (C Temp) such as onboard regulation, adjustable power – 14 mV (I Temp, Q Temp) supplies, and switching power supplies. The TL432 • Low Output Noise device has exactly the same functionality and electrical specifications as the TL431 device, but has • 0.2-Ω Typical Output Impedance different pinouts for the DBV, DBZ, and PK packages. • Sink-Current Capability: 1 mA to 100 mA Both the TL431 and TL432 devices are offered in • three grades, with initial tolerances (at 25°C) of 0.5%,
2 Applications
1%, and 2%, for the B, A, and standard grade, • Adjustable Voltage and Current Referencing respectively. In addition, low output drift versus temperature ensures good stability over the entire • Secondary Side Regulation in Flyback SMPSs temperature range. • Zener Replacement The TL43xxC devices are characterized for operation • Voltage Monitoring from 0°C to 70°C, the TL43xxI devices are • Comparator with Integrated Reference characterized for operation from –40°C to 85°C, and the TL43xxQ devices are characterized for operation from –40°C to 125°C.
Device Information(1) PART NUMBER PACKAGE (PIN) BODY SIZE (NOM)
SOT-23-3 (3) 2.90 mm x 1.30 mm SOT-23-5 (5) 2.90 mm x 1.60 mm TL43xx SOIC (8) 4.90 mm x 3.90 mm PDIP (8) 9.50 mm x 6.35 mm SOP (8) 6.20 mm x 5.30 mm (1) For all available packages, see the orderable addendum at the end of the data sheet.
4 Simplified Schematic
Input VKA IKA Vref 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. Document Outline 1 Features 2 Applications 3 Description 4 Simplified Schematic Table of Contents 5 Revision History 6 Pin Configuration and Functions 7 Specifications 7.1 Absolute Maximum Ratings 7.2 ESD Ratings 7.3 Thermal Information 7.4 Recommended Operating Conditions 7.5 Electrical Characteristics, TL431C, TL432C 7.6 Electrical Characteristics, TL431I, TL432I 7.7 Electrical Characteristics, TL431Q, TL432Q 7.8 Electrical Characteristics, TL431AC, TL432AC 7.9 Electrical Characteristics, TL431AI, TL432AI 7.10 Electrical Characteristics, TL431AQ, TL432AQ 7.11 Electrical Characteristics, TL431BC, TL432BC 7.12 Electrical Characteristics, TL431BI, TL432BI 7.13 Electrical Characteristics, TL431BQ, TL432BQ 7.14 Typical Characteristics 8 Parameter Measurement Information 9 Detailed Description 9.1 Overview 9.2 Functional Block Diagram 9.3 Feature Description 9.4 Device Functional Modes 9.4.1 Open Loop (Comparator) 9.4.2 Closed Loop 10 Applications and Implementation 10.1 Application Information 10.2 Typical Applications 10.2.1 Comparator With Integrated Reference 10.2.1.1 Design Requirements 10.2.1.2 Detailed Design Procedure 10.2.1.3 Application Curves 10.2.2 Shunt Regulator/Reference 10.2.2.1 Design Requirements 10.2.2.2 Detailed Design Procedure 10.2.2.3 Application Curves 10.3 System Examples 11 Power Supply Recommendations 12 Layout 12.1 Layout Guidelines 12.2 Layout Example 13 Device and Documentation Support 13.1 Related Links 13.2 Trademarks 13.3 Electrostatic Discharge Caution 13.4 Glossary 14 Mechanical, Packaging, and Orderable Information
