Datasheet TL431, TL432 (Texas Instruments) - 4

TL431, TL432
SLVS543S – AUGUST 2004 – REVISED MAY 2024
www.ti.com 5 Pin Configuration and Functions
* *- Must be connected to ANODE or left open TL431, TL431A, TL431B . D (SOIC) PACKAGE TL431, TL431A, TL431B . P (PDIP), PS (SOP), (TOP VIEW) OR PW (TSSOP) PACKAGE (TOP VIEW) CATHODE 1 8 REF ANODE 2 7 ANODE CATHODE 1 8 REF ANODE 3 6 ANODE NC 2 7 NC NC 4 5 NC NC 3 6 ANODE NC 4 5 NC NC − No internal connection NC − No internal connection TL431, TL431A, TL431B . PK (SOT-89) PACKAGE TL432, TL432A, TL432B . PK (SOT-89) PACKAGE (TOP VIEW) (TOP VIEW) CATHODE REF ANODE ANODE ANODE ANODE REF CATHODE TL432, TL432A, TL432B . DBV (SOT-23-5) PACKAGE TL431, TL431A, TL431B . DBV (SOT-23-5) PACKAGE (TOP VIEW) (TOP VIEW) 1 1 NC REF NC 5 5 ANODE 2 ANODE † 2 NC 3 4 CATHODE CATHODE 3 4 REF NC − No internal connection NC − No internal connection † Pin 2 is attached to Substrate and must be connected to ANODE or left open. TL432, TL432A, TL432B . DBZ (SOT-23-3) PACKAGE TL431, TL431A, TL431B . DBZ (SOT-23-3) PACKAGE (TOP VIEW) (TOP VIEW) CATHODE 1 REF 1 3 ANODE 3 ANODE REF 2 CATHODE 2
Table 5-1. Pin Functions PIN TL431x TL432x TYPE DESCRIPTION NAME P, PS DBZ DBV PK D LP DCK DBZ DBV PK PW
CATHODE 1 3 3 1 1 1 1 2 4 1 I/O Shunt Current/Voltage input REF 2 4 1 8 8 3 3 1 5 3 I Threshold relative to common anode 2, 3, 6, ANODE 3 5 2 6 2 6 3 2 2 O Common pin, normally connected to ground 7 4 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated Product Folder Links: TL431 TL432 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