Datasheet TLV431, TLV431A, TLV431B (Texas Instruments) - 7

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TLV431 , TLV431A, TLV431B www.ti.com
SLVS139W – JULY 1996 – REVISED MARCH 2018
6.7 Electrical Characteristics for TLV431B
at 25°C free-air temperature (unless otherwise noted)
TLV431B PARAMETER TEST CONDITIONS UNIT MIN TYP MAX
TA = 25°C 1.234 1.24 1.246 V TLV431BC 1.227 1.253 V KA = VREF, REF Reference voltage V I TA = full range(1) K = 10 mA TLV431BI 1.224 1.259 (see Figure 22) TLV431BQ 1.221 1.265 TLV431BC 4 12 V V V REF deviation over full temperature KA = VREF , IK = 10 mA (1) REF(dev) TLV431BI 6 20 mV range(2) (see Figure 22) TLV431BQ 11 31 D R V EF Ratio of VREF change in cathode VKA = VREF to 6 V, IK = 10 mA –1.5 –2.7 mV/V D voltage change (see Figure 23) K V A IK = 10 mA, R1 = 10 kΩ, Iref Reference terminal current R2 = open 0.1 0.5 µA (see Figure 23) TLV431BC 0.05 0.3 I I K = 10 mA, R1 = 10 kΩ, I ref deviation over full temperature ref(dev) R2 = open(3) TLV431BI 0.1 0.4 µA range(2) (see Figure 23) TLV431BQ 0.15 0.5 Minimum cathode current for IK(min) V regulation KA = VREF (see Figure 22) 55 100 µA IK(off) Off-state cathode current VREF = 0, VKA = 6 V (see Figure 24) 0.001 0.1 µA |zKA| Dynamic impedance(4) VKA = VREF, f ≤ 1 kHz, IK = 0.1 mA to 15 mA 0.25 0.4 Ω (see Figure 22) (1) Full temperature ranges are –40°C to 125°C for TLV431Q, –40°C to 85°C for TLV431I, and 0°C to 70°C for TLV431C. (2) The deviation parameters VREF(dev) and Iref(dev) are defined as the differences between the maximum and minimum values obtained over the rated temperature range. The average full-range temperature coefficient of the reference input voltage, αVREF, is defined as: æ V ö REF(dev ) 6 ´ 10 ç ÷ æ ppm V T = 25 C ° ö è ø REF ( A ) aV = ç ÷ REF è C ° ø T D A where ΔTA is the rated operating free-air temperature range of the device. αVREF can be positive or negative, depending on whether minimum VREF or maximum VREF, respectively, occurs at the lower temperature. (3) Full temperature ranges are –40°C to 125°C for TLV431Q, –40°C to 85°C for TLV431I, and 0°C to 70°C for TLV431C. V D KA zka = (4) The dynamic impedance is defined as I D K spacer When the device is operating with two external resistors (see Figure 23), the total dynamic impedance of the circuit is defined as: V D R1 æ ö z ¢ = » z ´ 1 ç + ÷ ka ka I D è R2 ø Copyright © 1996–2018, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: TLV431 TLV431A TLV431B Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Revision History 5 Pin Configuration and Functions 6 Specifications 6.1 Absolute Maximum Ratings 6.2 ESD Ratings 6.3 Recommended Operating Conditions 6.4 Thermal Information 6.5 Electrical Characteristics for TLV431 6.6 Electrical Characteristics for TLV431A 6.7 Electrical Characteristics for TLV431B 6.8 Typical Characteristics 7 Parameter Measurement Information 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 (Open Loop) 9.2.1.1 Design Requirements 9.2.1.2 Detailed Design Procedure 9.2.1.3 Application Curves 9.2.2 Shunt Regulator/Reference 9.2.2.1 Design Requirements 9.2.2.2 Detailed Design Procedure 9.2.2.3 Application Curve 10 Power Supply Recommendations 11 Layout 11.1 Layout Guidelines 11.2 Layout Example 12 Device and Documentation Support 12.1 Documentation Support 12.1.1 Related Documentation 12.2 Related Links 12.3 Receiving Notification of Documentation Updates 12.4 Community Resources 12.5 Trademarks 12.6 Electrostatic Discharge Caution 12.7 Glossary 13 Mechanical, Packaging, and Orderable Information