Datasheet TL431, TL432 (Texas Instruments) - 8

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TL431, TL432
SLVS543S – AUGUST 2004 – REVISED MAY 2024
www.ti.com 6.7 Electrical Characteristics, TL431Q, TL432Q
over recommended operating conditions, TA = 25°C (unless otherwise noted)
PARAMETER TEST CIRCUIT TEST CONDITIONS MIN TYP MAX UNIT
Vref Reference Voltage See Figure 7-1 VKA = Vref, IKA = 10mA 2440 2495 2550 mV Deviation of reference VI(dev) input voltage over full See Figure 7-1 VKA = Vref, IKA = 10mA 14 34 mV temperature range (1) Ratio of change in ΔVKA = 10V- Vref –1.4 –2.7 mV/V ΔVref / reference voltage to See Figure 7-2 I ΔV KA = 10mA KA the change in cathode ΔVKA = 36V- 10V –1 –2 mV/V voltage Iref Reference Input Current See Figure 7-2 IKA = 10mA, R1 = 10kΩ, R2 = ∞ 2 4 µA Deviation of reference II(dev) input current over full See Figure 7-2 IKA = 10mA, R1 = 10kΩ, R2 = ∞ 0.8 2.5 µA temperature range (1) Minimum cathode Imin See Figure 7-1 V current for regulation KA = Vref 0.4 1 mA Ioff Off-state cathode current See Figure 7-3 VKA = 36V, Vref = 0 0.1 1 µA V |Z KA = Vref, f ≤ 1kHz, KA| Dynamic Impedance (2) See Figure 7-1 0.2 0.5 Ω IKA = 1mA to 100mA (1) The deviation parameters VI(dev) and II(dev) are defined as the differences between the maximum and minimum values obtained over the rated temperature range. For more details on VI(dev) and how it relates to the average temperature coefficient, see Temperature Coefficient. (2) The dynamic impedance is defined by |ZKA| = ΔVKA/ΔIKA. For more details on |ZKA| and how it relates to VKA, see Dynamic Impedance. 8 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