TL1431-SP www.ti.com SLVSB44 – JULY 2012 CLASS V, PRECISION PROGRAMMABLE REFERENCE Check for Samples: TL1431-SP FEATURES 1 • • • • • • • JG PACKAGE (TOP VIEW) QMLV Qualified, SMD 5962-99620 0.4% Initial Voltage Tolerance 0.2-Ω Typical Output Impedance Fast Turnon…500 ns Sink Current Capability…1 mA to 100 mA Low Reference Current (REF) Adjustable Output Voltage…VI(ref) to 36 V CATHODE NC NC NC 1 8 2 7 3 6 4 5 REF NC ANODE NC NC – No internal connection DESCRIPTION/ORDERING INFORMATION The TL1431 is a precision programmable reference with specified thermal stability over automotive, commercial, and military temperature ranges. The output voltage can be set to any value between VI(ref) (approximately 2.5 V) and 36 V with two external resistors. This device has a typical output impedance of 0.2 Ω. Active output circuitry provides a very sharp turnon characteristic, making the device an excellent replacement for Zener diodes and other types of references in applications such as onboard regulation, adjustable power supplies, and switching power supplies. The TL1431 is characterized for operation over the full military temperature range of –55°C to 125°C. ORDERING INFORMATION (1) PACKAGE (2) TA –55°C to 125°C (1) (2) ORDERABLE PART NUMBER TOP-SIDE MARKING CDIP – JG Tube of 50 5962-9962001VPA 9962001VPA CFP – U TBD 5962-9962001VHA (Preview) 9962001VHA For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at www.ti.com. Package drawings, thermal data, and symbolization are available at www.ti.com/packaging. SYMBOL REF ANODE CATHODE FUNCTIONAL BLOCK DIAGRAM CATHODE + − REF Vref ANODE 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2012, Texas Instruments Incorporated TL1431-SP SLVSB44 – JULY 2012 www.ti.com EQUIVALENT SCHEMATIC CATHODE 1 800 Ω REF 800 Ω 8 20 pF 150 Ω 4 kΩ 3.28 kΩ 10 kΩ 2.4 kΩ 20 pF 7.2 kΩ 1 kΩ 800 Ω ANODE 2, 3, 6, 7 Absolute Maximum Ratings (1) over operating free-air temperature range (unless otherwise noted) MIN VKA Cathode voltage (2) IKA Continuous cathode current range II(ref) Reference input current range θJC Package thermal impedance (3) (4) TJ Operating virtual junction temperature Lead temperature Tstg (1) (2) (3) (4) MAX V –100 150 mA –0.05 10 mA JG package 14.5 U package TBD 1,6 mm (1/16 in) from case for 10 s Storage temperature range UNIT 37 –65 °C/W 150 °C 260 °C 150 °C Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltage values are with respect to ANODE, unless otherwise noted. Maximum power dissipation is a function of TJ(max), θJC, and TC. The maximum allowable power dissipation at any allowable case temperature is PD = (TJ(max) – TC)/θJC. Operating at the absolute maximum TJ of 150°C can affect reliability. The package thermal impedance is calculated in accordance with MIL-STD-883. Recommended Operating Conditions MIN MAX UNIT VKA Cathode voltage VI(ref) 36 V IKA Cathode current 1 100 mA TA Operating free-air temperature –55 125 °C 2 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): TL1431-SP TL1431-SP www.ti.com SLVSB44 – JULY 2012 Electrical Characteristics at specified free-air temperature, IKA = 10 mA (unless otherwise noted) PARAMETER TEST CONDITIONS TA (1) TEST CIRCUIT 25°C TYP MAX 2475 2500 2540 UNIT VI(ref) Reference input voltage VKA = VI(ref) VI(dev) Deviation of reference input voltage over full temperature range (2) VKA = VI(ref) Full range Figure 1 17 55 (3) ∆VI(ref) ∆VKA Ratio of change in reference input voltage to the change in cathode voltage ΔVKA = 3 V to 36 V Full range Figure 2 –1.1 –2 1.5 2.5 II(ref) Reference input current R1 = 10 kΩ, R2 = ∞ II(dev) Deviation of reference input current over full temperature range (2) R1 = 10 kΩ, R2 = ∞ Full range Figure 2 0.5 3 (3) μA Imin Minimum cathode current for regulation VKA = VI(ref) 25°C Figure 1 0.45 1 mA 0.18 0.5 Ioff Off-state cathode current VKA = 36 V, VI(ref) = 0 |zKA| Output impedance (4) VKA = VI(ref), f ≤ 1 kHz, IKA = 1 mA to 100 mA Full range Figure 1 MIN 2460 25°C Full range Figure 2 5 25°C (1) (2) 2550 Full range Figure 3 25°C Figure 1 2 0.2 0.4 mV mV mV/V μA μA Ω Full range is –55°C to 125°C. 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. The average full-range temperature coefficient of the reference input voltage αVI(ref) is defined as: αVI(ref) ( ppm = °C ( ( V( I dev) ° V ( ) at 25 C I ref ( 6 × 10 Max VI(ref) TA VI(dev) where: ∆TA is the rated operating temperature range of the device. Min VI(ref) ˙TA (3) (4) αVI(ref) is positive or negative, depending on whether minimum VI(ref) or maximum VI(ref), respectively, occurs at the lower temperature. On products compliant to MIL-PRF-38535, this parameter is not production tested. ∆VKA |zKA| = ∆IKA The output impedance is defined as: When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is given by: |z'| = ∆V |z | 1 + R1 R2 . ∆I , which is approximately equal to KA ( ( Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): TL1431-SP 3 TL1431-SP SLVSB44 – JULY 2012 www.ti.com PARAMETER MEASUREMENT INFORMATION VKA Input Input VKA IKA IKA R1 VI(ref) R2 Figure 1. Test Circuit for V(KA) = Vref II(ref) VI(ref) ǒ Ǔ VKA + VI(ref) 1 ) R1 ) II(ref) R2 R1 Figure 2. Test Circuit for V(KA) > Vref Input VKA Ioff Figure 3. Test Circuit for Ioff 4 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): TL1431-SP TL1431-SP www.ti.com SLVSB44 – JULY 2012 TYPICAL CHARACTERISTICS Data at high and low temperatures are applicable only within the recommended operating free-air temperature ranges of the various devices. REFERENCE VOLTAGE vs FREE-AIR TEMPERATURE REFERENCE CURRENT vs FREE-AIR TEMPERATURE 2.5 2.52 IKA = 10 mA R1 = 10 kΩ R2 = ∞ 2.51 2.5 2.49 2.48 − 50 2 I I(ref) − Reference Current − µ A VI(ref) − Reference Voltage − V VI(ref) = VKA IKA = 10 mA 0 − 25 25 50 75 100 1.5 1 0.5 0 − 50 125 − 25 TA − Free-Air Temperature − °C 0 25 50 75 100 TA − Free-Air Temperature − °C Figure 4. 125 Figure 5. CATHODE CURRENT vs CATHODE VOLTAGE CATHODE CURRENT vs CATHODE VOLTAGE 150 800 VKA = VI(ref) TA = 25°C VKA = VI(ref) TA = 25°C 600 I KA − Cathode Current − µ A I KA − Cathode Current − mA 100 50 0 − 50 200 0 − 100 − 150 −3 400 −2 0 1 −1 VKA − Cathode Voltage − V 2 3 − 200 −2 −1 0 1 2 3 4 VKA − Cathode Voltage − V Figure 6. Figure 7. Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): TL1431-SP 5 TL1431-SP SLVSB44 – JULY 2012 www.ti.com TYPICAL CHARACTERISTICS (continued) RATIO OF DELTA REFERENCE VOLTAGE TO DELTA CATHODE VOLTAGE vs FREE-AIR TEMPERATURE OFF-STATE CATHODE CURRENT vs FREE-AIR TEMPERATURE 0.35 VKA = 36 V VI(ref) = 0 −0.85 VKA = 3 V to 36 V −0.95 0.3 ∆V I(ref) /∆V KA − mV/V I KA(off) − Off-State Cathode Current − µ A 0.4 0.25 0.2 0.15 0.1 0.05 0 −50 −1.05 −1.15 −1.25 −1.35 − 25 0 25 50 100 75 125 −1.45 −50 TA − Free-Air Temperature − °C − 25 0 25 50 75 100 125 TA − Free-Air Temperature − °C Figure 8. Figure 9. EQUIVALENT INPUT-NOISE VOLTAGE vs FREQUENCY 260 Hz IO = 10 mA TA = 25°C Vn − Equivalent Input-Noise Voltage − nV/ 240 220 200 180 160 140 120 100 10 100 1k 10 k 100 k f − Frequency − Hz Figure 10. 6 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): TL1431-SP TL1431-SP www.ti.com SLVSB44 – JULY 2012 APPLICATION INFORMATION A. R should provide cathode current ≥1 mA to the TL1431 at minimum V(BATT). V(BATT) R V(BATT) VO R1 0.1% VI(ref) VO Von ≈ 2 V Voff ≈ V(BATT) TL1431 R2 0.1% Input TL1431 VIT = 2.5 V VO + ǒ1 ) R1ǓVI(ref) R2 GND Figure 16. Shunt Regulator A. Figure 17. Single-Supply Comparator With Temperature-Compensated Threshold R should provide cathode current ≥1 mA to the TL1431 at minimum V(BATT). V(BATT) V(BATT) R In µA7805 2N2222 Out VO 30 Ω 2N2222 TL1431 0.01 µF R1 TL1431 R2 4.7 kΩ VO R1 0.1% R2 0.1% ǒ Ǔ ǒ VO + 1 ) R1 VI(ref) R2 Ǔ V + 1 ) R1 V I(ref) R2 Min V = VI(ref) + 5 V Figure 18. Precision High-Current Series Regulator A. Common Figure 19. Output Control of a Three-Terminal Fixed Regulator Refer to the stability boundary conditions in Figure 15 to determine allowable values for C. Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): TL1431-SP 7 TL1431-SP SLVSB44 – JULY 2012 www.ti.com R V(BATT) V(BATT) VO VO R1 R1 TL1431 C R2 R2 TL1431 ǒ ǒ Figure 20. Higher-Current Shunt Regulator A. Ǔ Vtrip + 1 ) R1 VI(ref) R2 Ǔ VO + 1 ) R1 VI(ref) R2 Figure 21. Crowbar Rb should provide cathode current ≥1 mA to the TL1431. In V(BATT) V(BATT) Out VO = 5 V VO = 5 V, 1.5 A, 0.5% LM317 Rb 8.2 kΩ Adjust TL1431 243 Ω 0.1% 27.4 kΩ 0.1% TL1431 243 Ω 0.1% 27.4 kΩ 0.1% Figure 22. Precision 5-V, 1.5-A, 0.5% Regulator Figure 23. 5-V Precision Regulator 12 V 6.8 kΩ VCC 5 V +0.5% TL1431 10 kΩ − 10 kΩ 0.1% 10 kΩ 0.1% + X Not Used TL598 Feedback Figure 24. PWM Converter With 0.5% Reference A. 8 Select R3 and R4 to provide the desired LED intensity and cathode current ≥1 mA to the TL1431. Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): TL1431-SP TL1431-SP www.ti.com SLVSB44 – JULY 2012 680 Ω R3 V(BATT) 12 V R1B R1A TL1431 R4 2 kΩ R TL1431 R2A TL1431 R2B On C Off ǒ Ǔ High Limit + ǒ1 ) R1AǓV I(ref) R2A Low Limit + 1 ) R1B V I(ref) R2B LED on When Low Limit < V(BATT) < High Limit Delay + R Figure 25. Voltage Monitor C I 12 V I (12 V) * V I(ref) Figure 26. Delay Timer RCL 0.1% V(BATT) IO V(BATT) IO R1 TL1431 TL1431 RS 0.1% V I(ref) ) IKA IO + R CL V R1 + (BATT) ǒ Ǔ I O h FE V )I IO + KA Figure 27. Precision Current Limiter I(ref) RS Figure 28. Precision Constant-Current Sink Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): TL1431-SP 9 PACKAGE OPTION ADDENDUM www.ti.com 5-Oct-2011 PACKAGING INFORMATION Orderable Device 5962-9962001VPA Status (1) ACTIVE Package Type Package Drawing CDIP JG Pins Package Qty 8 1 Eco Plan TBD (2) Lead/ Ball Finish A42 MSL Peak Temp (3) Samples (Requires Login) N / A for Pkg Type (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. OTHER QUALIFIED VERSIONS OF TL1431-SP : • Catalog: TL1431 • Automotive: TL1431-Q1 • Enhanced Product: TL1431-EP Addendum-Page 1 PACKAGE OPTION ADDENDUM www.ti.com 5-Oct-2011 • Military: TL1431M NOTE: Qualified Version Definitions: • Catalog - TI's standard catalog product • Automotive - Q100 devices qualified for high-reliability automotive applications targeting zero defects • Enhanced Product - Supports Defense, Aerospace and Medical Applications • Military - QML certified for Military and Defense Applications Addendum-Page 2 MECHANICAL DATA MCER001A – JANUARY 1995 – REVISED JANUARY 1997 JG (R-GDIP-T8) CERAMIC DUAL-IN-LINE 0.400 (10,16) 0.355 (9,00) 8 5 0.280 (7,11) 0.245 (6,22) 1 0.063 (1,60) 0.015 (0,38) 4 0.065 (1,65) 0.045 (1,14) 0.310 (7,87) 0.290 (7,37) 0.020 (0,51) MIN 0.200 (5,08) MAX Seating Plane 0.130 (3,30) MIN 0.023 (0,58) 0.015 (0,38) 0°–15° 0.100 (2,54) 0.014 (0,36) 0.008 (0,20) 4040107/C 08/96 NOTES: A. B. C. D. E. All linear dimensions are in inches (millimeters). This drawing is subject to change without notice. This package can be hermetically sealed with a ceramic lid using glass frit. Index point is provided on cap for terminal identification. Falls within MIL STD 1835 GDIP1-T8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46C and to discontinue any product or service per JESD48B. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. 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