Datasheet TL431, TL432 (Texas Instruments)

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TL431 , TL432
SLVS543S – AUGUST 2004 – REVISED MAY 2024
TL431, TL432 Precision Programmable Reference 1 Features 3 Description
• Reference voltage tolerance at 25°C The TL431 and TL432 devices are three-terminal – 0.5% (B grade) adjustable shunt regulators, with specified thermal – 1% (A grade) stability over applicable automotive, commercial, and – 2% (Standard grade) military temperature ranges. The output voltage can • Adjustable output voltage: V be set to any value between V ref to 36V ref (approximately • Operation from −40°C to 125°C 2.5V) and 36V, with two external resistors. These • Typical temperature drift (TL43xB) devices have a typical output impedance of 0.2Ω. – 6mV (C temp) Active output circuitry provides a very sharp turn- – 14mV (I temp, Q temp) on characteristic, making these devices excellent • Low Output Noise replacements for Zener diodes in many applications, • 0.2Ω Typical output impedance such as on-board regulation, adjustable power • Sink-current capability: 1mA to 100mA supplies, and switching power supplies. The TL432 device has exactly the same functionality and
2 Applications
electrical specifications as the TL431 device, but has • Rack server power different pinouts for the DBV, DBZ, and PK packages. • Industrial AC/DC Both the TL431 and TL432 devices are offered in • AC inverter & VF drives three grades, with initial tolerances (at 25°C) of • Servo drive control module 0.5%, 1%, and 2%, for the B, A, and standard • Notebook PC power adapter design grade, respectively. In addition, low output drift versus temperature verifies good stability over the entire Input VKA temperature range. IKA The TL43xxC devices are characterized for operation from 0°C to 70°C, the TL43xxI devices are characterized for operation from –40°C to 85°C, and the TL43xxQ devices are characterized for operation Vref from –40°C to 125°C.
Device Information Simplified Schematic PART NUMBER PACKAGE (PIN)
(1)
BODY SIZE (NOM)
(2) SOT-23-3 (3) 2.90mm × 1.30mm SOT-23-5 (5) 2.90mm × 1.60mm TL43x SOIC (8) 4.90mm × 3.90mm PDIP (8) 9.50mm × 6.35mm SOP (8) 6.20mm × 5.30mm (1) For all available packages, see the orderable addendum at the end of the data sheet. (2) The package size (length × width) is a nominal value and includes pins, where applicable. 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 Table of Contents 4 Device Comparison Table 5 Pin Configuration and Functions 6 Specifications 6.1 Absolute Maximum Ratings 6.2 ESD Ratings 6.3 Thermal Information 6.4 Recommended Operating Conditions 6.5 Electrical Characteristics, TL431C, TL432C 6.6 Electrical Characteristics, TL431I, TL432I 6.7 Electrical Characteristics, TL431Q, TL432Q 6.8 Electrical Characteristics, TL431AC, TL432AC 6.9 Electrical Characteristics, TL431AI, TL432AI 6.10 Electrical Characteristics, TL431AQ, TL432AQ 6.11 Electrical Characteristics, TL431BC, TL432BC 6.12 Electrical Characteristics, TL431BI, TL432BI 6.13 Electrical Characteristics, TL431BQ, TL432BQ 6.14 Typical Characteristics 7 Parameter Measurement Information 7.1 Temperature Coefficient 7.2 Dynamic Impedance 8 Detailed Description 8.1 Overview 8.2 Functional Block Diagram 8.3 Feature Description 8.4 Device Functional Modes 8.4.1 Open Loop (Comparator) 8.4.2 Closed Loop 9 Applications and Implementation 9.1 Application Information 9.2 Typical Applications 9.2.1 Comparator With Integrated Reference 9.2.1.1 Design Requirements 9.2.1.2 Detailed Design Procedure 9.2.1.2.1 Basic Operation 9.2.1.2.1.1 Overdrive 9.2.1.2.2 Output Voltage and Logic Input Level 9.2.1.2.2.1 Input Resistance 9.2.1.3 Application Curve 9.2.2 Shunt Regulator/Reference 9.2.2.1 Design Requirements 9.2.2.2 Detailed Design Procedure 9.2.2.2.1 Programming Output/Cathode Voltage 9.2.2.2.2 Total Accuracy 9.2.2.2.3 Stability 9.2.2.2.4 Start-Up Time 9.2.2.3 Application Curve 9.3 System Examples 9.4 Power Supply Recommendations 9.5 Layout 9.5.1 Layout Guidelines 9.5.2 Layout Example 10 Device and Documentation Support 10.1 Device Nomenclature 10.2 Related Links 10.3 Receiving Notification of Documentation Updates 10.4 Support Resources 10.5 Trademarks 10.6 Electrostatic Discharge Caution 10.7 Glossary 11 Revision History 12 Mechanical, Packaging, and Orderable Information