TLVH431A-Q1 TLVH431B-Q1 SLVS906B – DECEMBER 2008 – REVISED MARCH 2011 www.ti.com LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS Check for Samples: TLVH431A-Q1, TLVH431B-Q1 FEATURES 1 • • • Qualified for Automotive Applications Low-Voltage Operation: Down to 1.24 V Reference Voltage Tolerances at 25°C – 0.5% for B Grade – 1% for A Grade Adjustable Output Voltage, VO = VREF to 18 V Wide Operating Cathode Current Range: 100 μA to 70 mA 0.25-Ω Typical Output Impedance –40°C to 125°C Specifications • • • • DESCRIPTION/ORDERING INFORMATION The TLVH431 devices are low-voltage 3-terminal adjustable voltage references, with thermal stability specified over the automotive temperature range. Output voltage can be set to any value between VREF (1.24 V) and 18 V with two external resistors (see Figure 2). These devices operate from a lower voltage (1.24 V) than the widely used TL431 and TL1431 shunt-regulator references. When used with an optocoupler, the TLVH431 devices are ideal voltage reference in isolated feedback circuits for 3-V to 3.3-V switching-mode power supplies. They have a typical output impedance of 0.25 Ω. Active output circuitry provides a very sharp turn-on characteristic, making the TLVH431 an excellent replacement for low-voltage Zener diodes in many applications, including on-board regulation and adjustable power supplies. ORDERING INFORMATION (1) TA –40°C to 125°C (1) (2) VREF TOLERANCE PACKAGE (2) ORDERABLE PART NUMBER TOP-SIDE MARKING 0.5% SOT-23-5 – DBV Reel of 3000 TLVH431BQDBVRQ1 VOPQ 0.5% SOT-23-3 - DBZ Reel of 3000 TLVH431BQDBZRQ1 VPIQ 1% SOT-23-5 – DBV Reel of 3000 TLVH431AQDBVRQ1 VOOQ 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. 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 © 2008–2011, Texas Instruments Incorporated TLVH431A-Q1 TLVH431B-Q1 SLVS906B – DECEMBER 2008 – REVISED MARCH 2011 www.ti.com LOGIC BLOCK DIAGRAM CATHODE REF + − VREF = 1.24 V ANODE EQUIVALENT SCHEMATIC Cathode REF Anode 2 Submit Documentation Feedback Copyright © 2008–2011, Texas Instruments Incorporated Product Folder Link(s): TLVH431A-Q1 TLVH431B-Q1 TLVH431A-Q1 TLVH431B-Q1 SLVS906B – DECEMBER 2008 – REVISED MARCH 2011 www.ti.com ABSOLUTE MAXIMUM RATINGS (1) over operating free-air temperature range (unless otherwise noted) VKA Cathode voltage (2) IK Cathode current range –25 mA to 80 mA Iref Reference current range –0.05 mA to 3 mA θJA Package thermal impedance (3) TJ Operating virtual junction temperature Tstg Storage temperature range (1) (2) (3) (4) 20 V (4) 206°C/W 150°C –65°C to 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. Voltage values are with respect to the anode terminal, unless otherwise noted. Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability. The package thermal impedance is calculated in accordance with JESD 51-7. RECOMMENDED OPERATING CONDITIONS MIN MAX UNIT VKA Cathode voltage VREF 18 V IK Cathode current (continuous) 0.1 70 mA TA Operating free-air temperature –40 125 °C Copyright © 2008–2011, Texas Instruments Incorporated Product Folder Link(s): TLVH431A-Q1 TLVH431B-Q1 Submit Documentation Feedback 3 TLVH431A-Q1 TLVH431B-Q1 SLVS906B – DECEMBER 2008 – REVISED MARCH 2011 www.ti.com TLVH431A ELECTRICAL CHARACTERISTICS at 25°C free-air temperature (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX TA = 25°C 1.228 1.24 1.252 TA = full range (1) (see Figure 1) 1.209 VREF Reference voltage VKA = VREF, IK = 10 mA VREF(dev) VREF deviation over full temperature range (1) (2) VKA = VREF, IK = 10 mA (see Figure 1) DVREF DVKA Ratio of VREF change to cathode voltage change VK = VREF to 18 V, IK = 10 mA (see Figure 2) Iref Reference terminal current Iref(dev) 1.271 UNIT V 11 31 –1.5 –2.7 mV/V IK = 10 mA, R1 = 10 kΩ, R2 = open (see Figure 2) 0.1 0.5 μA Iref deviation over full temperature range (1) (2) IK = 10 mA, R1 = 10 kΩ, R2 = open (see Figure 2) 0.15 0.5 μA IK(min) Minimum cathode current for regulation VKA = VREF (see Figure 1) 60 100 μA IK(off) Off-state cathode current VREF = 0, VKA = 18 V (see Figure 3) 0.02 0.1 μA VKA = VREF, f ≤ 1 kHz, IK = 0.1 mA to 70 mA (see Figure 1) 0.25 0.4 Ω |zKA| (1) (2) Dynamic impedance Full temperature range is –40°C to 125°C. 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: VREF(dev) 10 6 VREF (TA+25 oC) ppm ŤaVREFŤ o + DTA C ǒ Ǔ (3) (3) mV ǒ Ǔ 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. The dynamic impedance is defined as: Ťz Ť + ∆VKA KA ∆I K When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is defined as: Ťz Ť + ∆V [ Ťz Ť 1 ) R1 KA KA ∆I R2 ǒ 4 Ǔ Submit Documentation Feedback Copyright © 2008–2011, Texas Instruments Incorporated Product Folder Link(s): TLVH431A-Q1 TLVH431B-Q1 TLVH431A-Q1 TLVH431B-Q1 SLVS906B – DECEMBER 2008 – REVISED MARCH 2011 www.ti.com TLVH431B ELECTRICAL CHARACTERISTICS at 25°C free-air temperature (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX TA = 25°C 1.234 1.24 1.246 TA = full range (1) (see Figure 1) 1.221 VREF Reference voltage VKA = VREF, IK = 10 mA VREF(dev) VREF deviation over full temperature range (1) (2) VKA = VREF, IK = 10 mA (see Figure 1) DVREF DVKA Ratio of VREF change to cathode voltage change IK = 10 mA, VK = VREF to 18 V (see Figure 2) Iref Reference terminal current Iref(dev) 1.265 UNIT V 11 31 –1.5 –2.7 mV/V IK = 10 mA, R1 = 10 kΩ, R2 = open (see Figure 2) 0.1 0.5 μA Iref deviation over full temperature range (1) (2) IK = 10 mA, R1 = 10 kΩ, R2 = open (see Figure 2) 0.15 0.5 μA IK(min) Minimum cathode current for regulation VKA = VREF (see Figure 1) 60 100 μA IK(off) Off-state cathode current VREF = 0, VKA = 18 V (see Figure 3) 0.02 0.1 μA VKA = VREF, f ≤ 1 kHz, IK = 0.1 mA to 70 mA (see Figure 1) 0.25 0.4 Ω |zKA| (1) (2) Dynamic impedance Full temperature range is –40°C to 125°C. 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: VREF(dev) 10 6 VREF (TA+25 oC) ppm ŤaVREFŤ o + DTA C ǒ Ǔ (3) (3) mV ǒ Ǔ 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. The dynamic impedance is defined as: Ťz Ť + ∆VKA KA ∆I K When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is defined as: Ťz Ť + ∆V [ Ťz Ť 1 ) R1 KA KA ∆I R2 ǒ Ǔ Copyright © 2008–2011, Texas Instruments Incorporated Product Folder Link(s): TLVH431A-Q1 TLVH431B-Q1 Submit Documentation Feedback 5 TLVH431A-Q1 TLVH431B-Q1 SLVS906B – DECEMBER 2008 – REVISED MARCH 2011 www.ti.com PARAMETER MEASUREMENT INFORMATION Operation of the device at any conditions beyond those indicated under recommended operating conditions is not implied. Input VO IK VREF Figure 1. Test Circuit for VKA = VREF, VO = VKA = VREF Input VO IK R1 R2 Iref VREF Figure 2. Test Circuit for VKA > VREF, VO = VKA = VREF × (1 + R1/R2) + Iref × R1 Input VO IK(off) Figure 3. Test Circuit for IK(off) 6 Submit Documentation Feedback Copyright © 2008–2011, Texas Instruments Incorporated Product Folder Link(s): TLVH431A-Q1 TLVH431B-Q1 TLVH431A-Q1 TLVH431B-Q1 SLVS906B – DECEMBER 2008 – REVISED MARCH 2011 www.ti.com PARAMETER MEASUREMENT INFORMATION (continued) REFERENCE VOLTAGE vs JUNCTION TEMPERATURE 1.254 IK = 10 mA V ref − Reference Voltage − V 1.252 1.250 1.248 1.246 1.244 1.242 1.240 1.238 −50 −25 0 25 50 75 100 125 150 TJ − Junction Temperature − °C Figure 4. REFERENCE INPUT CURRENT vs JUNCTION TEMPERATURE 250 230 210 IK = 10 mA R1 = 10 kΩ R2 = Open 190 170 150 130 110 90 70 50 −50 −25 0 25 50 75 100 125 150 Figure 5. Copyright © 2008–2011, Texas Instruments Incorporated Product Folder Link(s): TLVH431A-Q1 TLVH431B-Q1 Submit Documentation Feedback 7 TLVH431A-Q1 TLVH431B-Q1 SLVS906B – DECEMBER 2008 – REVISED MARCH 2011 www.ti.com PARAMETER MEASUREMENT INFORMATION (continued) CATHODE CURRENT vs CATHODE VOLTAGE 70 VKA = VREF TA = 25°C I K − Cathode Current − mA 10 5 0 −5 −10 −15 −1 −0.5 0 0.5 1 VKA − Cathode Voltage − V 1.5 Figure 6. CATHODE CURRENT vs CATHODE VOLTAGE 250 200 VKA = VREF TA = 25°C I K − Cathode Current − µ A 150 100 50 0 −50 −100 −150 −200 −250 −1 −0.5 0 0.5 1 VKA − Cathode Voltage − V 1.5 Figure 7. 8 Submit Documentation Feedback Copyright © 2008–2011, Texas Instruments Incorporated Product Folder Link(s): TLVH431A-Q1 TLVH431B-Q1 TLVH431A-Q1 TLVH431B-Q1 SLVS906B – DECEMBER 2008 – REVISED MARCH 2011 www.ti.com PARAMETER MEASUREMENT INFORMATION (continued) OFF-STATE CATHODE CURRENT vs JUNCTION TEMPERATURE IK(off) − Off-State Cathode Current − nA 4000 3500 VKA = 5 V VREF = 0 3000 2500 2000 1500 1000 500 0 −50 −25 0 25 50 75 100 125 150 TJ − Junction Temperature − °C Figure 8. RATIO OF DELTA REFERENCE VOLTAGE TO DELTA CATHODE VOLTAGE vs JUNCTION TEMPERATURE ∆V ref/ ∆V KA − Ratio of Delta Reference Voltage to Delta Cathode Voltage − mV/V 0 0.0 −0.1 IK = 10 mA ∆VKA = VREF to 18 V −0.2 −0.3 −0.4 −0.5 −0.6 −0.7 −0.8 −0.9 −1 −1.0 −50 −25 0 25 50 75 100 125 150 TJ − Junction Temperature − °C Figure 9. Copyright © 2008–2011, Texas Instruments Incorporated Product Folder Link(s): TLVH431A-Q1 TLVH431B-Q1 Submit Documentation Feedback 9 TLVH431A-Q1 TLVH431B-Q1 SLVS906B – DECEMBER 2008 – REVISED MARCH 2011 www.ti.com PARAMETER MEASUREMENT INFORMATION (continued) PERCENTAGE CHANGE IN VREF vs OPERATING LIFE AT 55°C 0.025 IK = 1 mA V ref− % Percentage Change in Vref 0 % Change (avg) − 0.025 % Change (3δ) − 0.05 − 0.075 − 0.1 % Change (−3δ) − 0.125 0 10 20 30 40 50 60 Operating Life at 55°C − kh(1) (1) Extrapolated from life-test data taken at 125°C; the activation energy assumed is 0.7 eV. Figure 10. EQUIVALENT INPUT NOISE VOLTAGE vs FREQUENCY 3V Vn − Equivalent Input Noise Voltage − nV/ Hz 350 VKA = VREF IK = 1 mA TA = 25°C 1 kΩ 300 470 µF + 750 Ω 2200 µF + 250 820 Ω TLVH431 TLE2027 + _ TP 160 kΩ 160 Ω 200 150 10 TEST CIRCUIT FOR EQUIVALENT INPUT NOISE VOLTAGE 100 1k 10 k f – Frequency – Hz 100 k Figure 11. 10 Submit Documentation Feedback Copyright © 2008–2011, Texas Instruments Incorporated Product Folder Link(s): TLVH431A-Q1 TLVH431B-Q1 TLVH431A-Q1 TLVH431B-Q1 SLVS906B – DECEMBER 2008 – REVISED MARCH 2011 www.ti.com PARAMETER MEASUREMENT INFORMATION (continued) EQUIVALENT INPUT NOISE VOLTAGE OVER A 10-S PERIOD Vn − Equivalent Input Noise Voltage − µ V 10 f = 0.1 Hz to 10 Hz IK = 1 mA TA = 25°C 8 6 4 2 0 −2 −4 −6 −8 −10 0 2 4 8 6 10 t − Time − s 3V 1 kΩ 470 µF + 750 Ω 0.47 µF 2200 µF + 820 Ω TLVH431 TLE2027 10 kΩ + _ 160 kΩ 10 kΩ 1 µF TLE2027 + _ 2.2 µF + TP CRO 1 MΩ 33 kΩ 16 Ω 0.1 µF 33 kΩ TEST CIRCUIT FOR 0.1-Hz TO 10-Hz EQUIVALENT NOISE VOLTAGE Figure 12. Copyright © 2008–2011, Texas Instruments Incorporated Product Folder Link(s): TLVH431A-Q1 TLVH431B-Q1 Submit Documentation Feedback 11 TLVH431A-Q1 TLVH431B-Q1 SLVS906B – DECEMBER 2008 – REVISED MARCH 2011 www.ti.com PARAMETER MEASUREMENT INFORMATION (continued) 0° 80 IK = 10 mA TA = 25°C 70 36° 60 72° 50 108° 40 144° 30 180° Phase Shift A V − Small-Signal Voltage Gain/Phase Margin − dB SMALL-SIGNAL VOLTAGE GAIN /PHASE MARGIN vs FREQUENCY Output IK 6.8 kΩ 180 Ω 10 µF 5V 4.3 kΩ 20 10 GND 0 −10 −20 100 TEST CIRCUIT FOR VOLTAGE GAIN AND PHASE MARGIN 1k 10 k 100 k 1M f − Frequency − Hz Figure 13. REFERENCE IMPEDANCE vs FREQUENCY 100 |z ka| − Reference Impedance − Ω IK = 0.1 mA to 70 mA TA = 25°C 100 Ω Output 10 IK 100 Ω 1 + − GND 0.1 TEST CIRCUIT FOR REFERENCE IMPEDANCE 0.01 1k 10 k 100 k 1M 10 M f − Frequency − Hz Figure 14. 12 Submit Documentation Feedback Copyright © 2008–2011, Texas Instruments Incorporated Product Folder Link(s): TLVH431A-Q1 TLVH431B-Q1 TLVH431A-Q1 TLVH431B-Q1 SLVS906B – DECEMBER 2008 – REVISED MARCH 2011 www.ti.com PARAMETER MEASUREMENT INFORMATION (continued) PULSE RESPONSE 1 3.5 3 Input and Output Voltage − V R = 18 kΩ TA = 25°C Input 18 kΩ Output 2.5 Ik 2 1.5 Pulse Generator f = 100 kHz Output 50 Ω 1 GND 0.5 0 TEST CIRCUIT FOR PULSE RESPONSE 1 −0.5 0 1 2 3 4 5 6 7 8 t − Time − µs Figure 15. PULSE RESPONSE 2 3.5 3 Input and Output Voltage − V R = 1.8 kΩ TA = 25°C Input 1.8 kΩ Output 2.5 IK 2 1.5 Pulse Generator f = 100 kHz Output 50 Ω 1 GND 0.5 0 TEST CIRCUIT FOR PULSE RESPONSE 2 −0.5 0 1 2 3 4 5 6 7 8 t − Time − µs Figure 16. Copyright © 2008–2011, Texas Instruments Incorporated Product Folder Link(s): TLVH431A-Q1 TLVH431B-Q1 Submit Documentation Feedback 13 TLVH431A-Q1 TLVH431B-Q1 SLVS906B – DECEMBER 2008 – REVISED MARCH 2011 www.ti.com PARAMETER MEASUREMENT INFORMATION (continued) 30 kW IK 50 W 100 µF I2 CL I1 Figure 17. Phase Margin Test Circuit IK Figure 18. 14 Submit Documentation Feedback Copyright © 2008–2011, Texas Instruments Incorporated Product Folder Link(s): TLVH431A-Q1 TLVH431B-Q1 TLVH431A-Q1 TLVH431B-Q1 SLVS906B – DECEMBER 2008 – REVISED MARCH 2011 www.ti.com PARAMETER MEASUREMENT INFORMATION (continued) IK Figure 19. IK Figure 20. Copyright © 2008–2011, Texas Instruments Incorporated Product Folder Link(s): TLVH431A-Q1 TLVH431B-Q1 Submit Documentation Feedback 15 TLVH431A-Q1 TLVH431B-Q1 SLVS906B – DECEMBER 2008 – REVISED MARCH 2011 www.ti.com APPLICATION INFORMATION ∼ VI 120 V − P + ∼ VO 3.3 V P P Gate Drive VCC Controller VFB TLVH431 Current Sense GND P P P P Figure 21. Flyback With Isolation Using TLVH431 as Voltage Reference and Error Amplifier Figure 21 shows the TLVH431 used in a 3.3-V isolated flyback supply. Output voltage VO can be as low as reference voltage VREF (1.24 V). The output of the regulator plus the forward voltage drop of the optocoupler LED (1.24 + 1.4 = 2.64 V) determine the minimum voltage that can be regulated in an isolated supply configuration. Regulated voltage as low as 2.7 Vdc is possible in the topology shown in Figure 21. 16 Submit Documentation Feedback Copyright © 2008–2011, Texas Instruments Incorporated Product Folder Link(s): TLVH431A-Q1 TLVH431B-Q1 PACKAGE OPTION ADDENDUM www.ti.com 7-May-2011 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/ Ball Finish MSL Peak Temp TLVH431AQDBVRQ1 ACTIVE SOT-23 DBV 5 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TLVH431BQDBVRQ1 ACTIVE SOT-23 DBV 5 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TLVH431BQDBZRQ1 ACTIVE SOT-23 DBZ 3 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM (3) Samples (Requires Login) (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. 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OTHER QUALIFIED VERSIONS OF TLVH431A-Q1, TLVH431B-Q1 : • Catalog: TLVH431A, TLVH431B Addendum-Page 1 PACKAGE OPTION ADDENDUM www.ti.com 7-May-2011 NOTE: Qualified Version Definitions: • Catalog - TI's standard catalog product Addendum-Page 2 PACKAGE MATERIALS INFORMATION www.ti.com 1-Apr-2011 TAPE AND REEL INFORMATION *All dimensions are nominal Device TLVH431BQDBZRQ1 Package Package Pins Type Drawing SPQ SOT-23 3000 DBZ 3 Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 179.0 8.4 Pack Materials-Page 1 3.15 B0 (mm) K0 (mm) P1 (mm) 2.95 1.22 4.0 W Pin1 (mm) Quadrant 8.0 Q3 PACKAGE MATERIALS INFORMATION www.ti.com 1-Apr-2011 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TLVH431BQDBZRQ1 SOT-23 DBZ 3 3000 203.0 203.0 35.0 Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. 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