Important notice Dear Customer, On 7 February 2017 the former NXP Standard Product business became a new company with the tradename Nexperia. Nexperia is an industry leading supplier of Discrete, Logic and PowerMOS semiconductors with its focus on the automotive, industrial, computing, consumer and wearable application markets In data sheets and application notes which still contain NXP or Philips Semiconductors references, use the references to Nexperia, as shown below. Instead of http://www.nxp.com, http://www.philips.com/ or http://www.semiconductors.philips.com/, use http://www.nexperia.com Instead of sales.addresses@www.nxp.com or sales.addresses@www.semiconductors.philips.com, use salesaddresses@nexperia.com (email) Replace the copyright notice at the bottom of each page or elsewhere in the document, depending on the version, as shown below: - (c) NXP N.V. (year). All rights reserved or (c) Koninklijke Philips Electronics N.V. (year). All rights reserved Should be replaced with: - (c) Nexperia B.V. (year). All rights reserved. If you have any questions related to the data sheet, please contact our nearest sales office via e-mail or telephone (details via salesaddresses@nexperia.com). Thank you for your cooperation and understanding, Kind regards, Team Nexperia SO T2 3 TL431 family Adjustable precision shunt regulator Rev. 5 -- 01 September 2015 Product data sheet 1. Product profile 1.1 General description Three-terminal shunt regulator family with an output voltage range between Vref and 36 V, to be set by two external resistors. * The TL431xDBZR types feature an enhanced stability area with a very low load capacity requirement. * The TL431xFDT types offer an enhanced stability area and a higher ElectroMagnetic Interference (EMI) ruggedness, for example, for Switch Mode Power Supply (SMPS) applications. * The TL431xSDT types are designed for standard requirements and linear applications. Table 1. Product overview Reference voltage tolerance (Vref) Temperature range (Tamb) 0C to 70 C 40 C to 85 C 40 C to 125 C Pinning configuration (see Table 3) 2% TL431CDBZR TL431IDBZR TL431QDBZR normal pinning TL431FDT normal pinning TL431MFDT mirrored pinning TL431SDT normal pinning TL431MSDT mirrored pinning TL431AQDBZR normal pinning TL431AFDT normal pinning TL431AMFDT mirrored pinning TL431ASDT normal pinning TL431AMSDT mirrored pinning TL431BQDBZR normal pinning TL431BFDT normal pinning 1% 0.5 % TL431ACDBZR TL431BCDBZR TL431AIDBZR TL431BIDBZR TL431BMFDT mirrored pinning TL431BSDT normal pinning TL431BMSDT mirrored pinning TL431 family NXP Semiconductors Adjustable precision shunt regulator 1.2 Features and benefits Programmable output voltage up to 36 V Three different reference voltage tolerances: Standard grade: 2 % A-Grade: 1 % B-Grade: 0.5 % Typical temperature drift: 6 mV (in a range of 0 C up to 70 C) Low output noise Typical output impedance: 0.2 Sink current capability: 1 mA to 100 mA AEC-Q100 qualified (grade 1) 1.3 Applications Shunt regulator Precision current limiter Precision constant current sink Isolated feedback loop for Switch Mode Power Supply (SMPS) 1.4 Quick reference data Table 2. TL431 family Product data sheet Quick reference data Symbol Parameter VKA cathode-anode voltage IK cathode current Vref reference voltage Conditions Min Typ Max Unit Vref - 36 V 1 - 100 mA Standard-Grade (2 %) 2440 2495 2550 mV A-Grade (1 %) 2470 2495 2520 mV B-Grade (0.5 %) 2483 2495 2507 mV VKA = Vref; IK = 10 mA; Tamb = 25 C All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 2 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator 2. Pinning information Table 3. Pinning Pin Symbol Description Simplified outline Graphic symbol Normal pinning: All types without MFDT and MSDT ending 1 k cathode 2 REF reference 3 a anode 3 REF a k 006aab355 1 2 Mirrored pinning: All types with MFDT and MSDT ending 1 REF reference 2 k cathode 3 a anode 3 REF a k 006aab355 1 TL431 family Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 2 (c) NXP Semiconductors N.V. 2015. All rights reserved. 3 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator 3. Ordering information Table 4. Ordering information Type number TL431CDBZR Package Name Description Version - plastic surface-mounted package; 3 leads SOT23 TL431IDBZR TL431QDBZR TL431FDT TL431MFDT TL431SDT TL431MSDT TL431ACDBZR TL431AIDBZR TL431AQDBZR TL431AFDT TL431AMFDT TL431ASDT TL431AMSDT TL431BCDBZR TL431BIDBZR TL431BQDBZR TL431BFDT TL431BMFDT TL431BSDT TL431BMSDT TL431 family Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 4 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator 4. Marking Table 5. Marking codes Type number Marking code[1] Type number Marking code[1] TL431CDBZR CA* TL431ASDT RL* TL431IDBZR CB* TL431AMSDT LQ* TL431QDBZR CC* TL431BCDBZR CG* TL431FDT AR* TL431BIDBZR CH* TL431MFDT AU* TL431BQDBZR CJ* TL431SDT RM* TL431BFDT AT* TL431MSDT LR* TL431BMFDT AW* TL431ACDBZR CD* TL431BSDT MA* TL431AIDBZR CE* TL431BMSDT MB* TL431AQDBZR CF* - - TL431AFDT AS* - - TL431AMFDT AV* - - [1] * = placeholder for manufacturing site code. 5. Functional diagram The TL431 family comprises a range of 3-terminal adjustable shunt regulators, with specified thermal stability over applicable automotive and commercial temperature ranges. The output voltage may be set to any value between Vref (approximately 2.5 V) and 36 V with two external resistors (see Figure 8). These devices have a typical output impedance of 0.2 . Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacements for Zener diodes in many applications like on-board regulation, adjustable power supplies and switching power supplies. CATHODE REF Vref ANODE Fig 1. TL431 family Product data sheet 006aab569 Functional diagram All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 5 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator 6. Limiting values Table 6. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Parameter VKA Conditions Min Max Unit cathode-anode voltage - 37 V IK cathode current 100 150 mA Iref reference current 0.05 10 mA [1] - 350 mW [2] - 580 mW Tamb 25 C total power dissipation Ptot [3] - 950 mW - 150 C TL431XCDBZR 0 +70 C TL431XIDBZR 40 +85 C TL431XQDBZR TL431XFDT TL431XSDT 40 +125 C storage temperature 65 +150 C Tj junction temperature Tamb ambient temperature Tstg [1] Device mounted on an FR4 Printed-Circuit Board (PCB), single-sided copper, tin-plated and standard footprint. [2] Device mounted on an FR4 PCB, single-sided copper, tin-plated, mounting pad for anode 1 cm2. [3] Device mounted on a ceramic PCB, Al2O3, standard footprint. 006aab570 1250 Ptot (mW) 1000 (1) 750 (2) 500 (3) 250 0 -75 -25 25 75 125 175 Tamb (C) (1) Ceramic PCB, Al2O3, standard footprint (2) FR4 PCB, mounting pad for anode 1 cm2 (3) FR4 PCB, standard footprint Fig 2. TL431 family Product data sheet Power derating curves All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 6 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator Table 7. ESD maximum ratings Tamb = 25 C unless otherwise specified. Symbol Parameter Conditions Min Max Unit VESD electrostatic discharge voltage MIL-STD-883 (human body model) - 4 kV 7. Recommended operating conditions Table 8. Operating conditions Symbol Parameter VKA IK Conditions Min Max Unit cathode-anode voltage Vref 36 V cathode current 1 100 mA 8. Thermal characteristics Table 9. Symbol Rth(j-a) Rth(j-sp) TL431 family Product data sheet Thermal characteristics Parameter thermal resistance from junction to ambient Conditions in free air thermal resistance from junction to solder point Min Typ Max Unit [1] - - 360 K/W [2] - - 216 K/W [3] - - 132 K/W [4] - - 50 K/W [1] Device mounted on an FR4 PCB, single-sided copper, tin-plated and standard footprint. [2] Device mounted on an FR4 PCB, single-sided copper, tin-plated, mounting pad for anode 1 cm2. [3] Device mounted on a ceramic PCB, Al2O3, standard footprint. [4] Soldering point of anode. All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 7 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator 9. Characteristics Table 10. Characteristics Tamb = 25 C unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit Standard-Grade (2 %): TL431CDBZR; TL431IDBZR; TL431QDBZR; TL431FDT; TL431MFDT; TL431SDT; TL431MSDT Vref reference voltage VKA = Vref; IK = 10 mA Vref reference voltage variation VKA = Vref; IK = 10 mA 2440 2495 2550 mV TL431CDBZR Tamb = 0 C to 70 C - 6 16 mV TL431IDBZR Tamb = 40 C to 85 C - 14 34 mV TL431QDBZR TL431FDT TL431MFDT TL431SDT TL431MSDT Tamb = 40 C to 125 C VKA = 10 V to Vref - 1.4 2.7 mV/V VKA = 36 V to 10 V - 1 2 mV/V - 2 4 A Vref/VKA reference voltage variation to cathode-anode voltage variation ratio IK = 10 mA Iref reference current IK = 10 mA; R1 = 10 k; R2 = open Iref reference current variation IK = 10 mA; R1 = 10 k; R2 = open TL431CDBZR Tamb = 0 C to 70 C - 0.4 1.2 A TL431IDBZR Tamb = 40 C to 85 C - 0.8 2.5 A TL431QDBZR TL431FDT TL431MFDT TL431SDT TL431MSDT Tamb = 40 C to 125 C IK(min) minimum cathode current VKA = Vref - 0.4 1 mA Ioff off-state current VKA = 36 V; Vref = 0 - 0.1 1 A ZKA dynamic cathode-anode impedance IK = 1 mA to 100 mA; VKA = Vref; f < 1 kHz - 0.2 0.5 A-Grade (1 %): TL431ACDBZR; TL431AIDBZR; TL431AQDBZR; TL431AFDT; TL431AMFDT; TL431ASDT; TL431AMSDT Vref reference voltage VKA = Vref; IK = 10 mA Vref reference voltage variation VKA = Vref; IK = 10 mA 2470 2495 2520 mV TL431ACDBZR Tamb = 0 C to 70 C - 6 16 mV TL431AIDBZR Tamb = 40 C to 85 C - 14 34 mV TL431AQDBZR TL431AFDT TL431AMFDT TL431ASDT TL431AMSDT Tamb = 40 C to 125 C VKA = 10 V to Vref - 1.4 2.7 mV/V VKA = 36 V to 10 V - 1 2 mV/V Vref/VKA reference voltage variation to cathode-anode voltage variation ratio TL431 family Product data sheet IK = 10 mA All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 8 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator Table 10. Characteristics ...continued Tamb = 25 C unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit Iref reference current IK = 10 mA; R1 = 10 k; R2 = open - 2 4 A Iref reference current variation IK = 10 mA; R1 = 10 k; R2 = open IK(min) TL431ACDBZR Tamb = 0 C to 70 C - 0.4 1.2 A TL431AIDBZR Tamb = 40 C to 85 C - 0.8 2.5 A TL431AQDBZR TL431AFDT TL431AMFDT TL431ASDT TL431AMSDT Tamb = 40 C to 125 C - 0.4 0.6 mA minimum cathode current VKA = Vref TL431ACDBZR Tamb = 0 C to 70 C TL431AIDBZR Tamb = 40 C to 85 C TL431AQDBZR TL431AFDT TL431AMFDT TL431ASDT TL431AMSDT Tamb = 40 C to 125 C Ioff off-state current VKA = 36 V; Vref = 0 - 0.1 0.5 A ZKA dynamic cathode-anode impedance IK = 1 mA to 100 mA; VKA = Vref; f < 1 kHz - 0.2 0.5 B-Grade (0.5 %): TL431BCDBZR; TL431BIDBZR; TL431BQDBZR; TL431BFDT; TL431BMFDT; TL431BSDT; TL431BMSDT Vref reference voltage VKA = Vref; IK = 10 mA Vref reference voltage variation VKA = Vref; IK = 10 mA 2495 2507 mV TL431BCDBZR Tamb = 0 C to 70 C - 6 16 mV TL431BIDBZR Tamb = 40 C to 85 C - 14 34 mV TL431BQDBZR TL431BFDT TL431BMFDT TL431BSDT TL431BMSDT Tamb = 40 C to 125 C VKA = 10 V to Vref - 1.4 2.7 mV/V VKA = 36 V to 10 V - 1 2 mV/V - 2 4 A Vref/VKA reference voltage variation to cathode-anode voltage variation ratio Iref 2483 reference current TL431 family Product data sheet IK = 10 mA IK = 10 mA; R1 = 10 k; R2 = open All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 9 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator Table 10. Characteristics ...continued Tamb = 25 C unless otherwise specified. Symbol Parameter Conditions Iref reference current variation IK = 10 mA; R1 = 10 k; R2 = open IK(min) Min Typ Max Unit TL431BCDBZR Tamb = 0 C to 70 C - 0.4 1.2 A TL431BIDBZR Tamb = 40 C to 85 C - 0.8 2.5 A TL431BQDBZR TL431BFDT TL431BMFDT TL431BSDT TL431BMSDT Tamb = 40 C to 125 C - 0.4 0.6 mA minimum cathode current VKA = Vref TL431BCDBZR Tamb = 0 C to 70 C TL431BIDBZR Tamb = 40 C to 85 C TL431BQDBZR TL431BFDT TL431BMFDT TL431BSDT TL431BMSDT Tamb = 40 C to 125 C Ioff off-state current VKA = 36 V; Vref = 0 - 0.1 0.5 A ZKA dynamic cathode-anode impedance IK = 1 mA to 100 mA; VKA = Vref; f < 1 kHz - 0.2 0.5 TL431 family Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 10 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator 006aab571 2.60 IK (mA) Vref (V) 2.56 100 2.52 50 2.48 0 2.44 -50 2.40 -75 -25 25 75 -100 125 Tamb (C) -2 -1 0 1 2 3 VKA (V) VKA = Vref; Tamb = 25 C IK = 10 mA; VKA = Vref Fig 3. 006aab572 150 Reference voltage as a function of ambient temperature; typical values Fig 4. Cathode current as a function of cathode-anode voltage; typical values INPUT VKA IK Vref GND 006aab573 IK = 10 mA; VKA = Vref Fig 5. Test circuit to Figure 3 and Figure 4 TL431 family Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 11 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator 006aab574 5.0 006aab575 0 Iref (A) Vref (mV) 4.0 -20 3.0 2.0 -40 1.0 0.0 -75 -25 25 75 -60 125 Tamb (C) 10 20 30 40 VKA (V) IK = 10 mA; Tamb = 25 C IK = 10 mA; R1 = 10 k; R2 = open Fig 6. 0 Reference current as a function of ambient temperature; typical values Fig 7. Reference voltage variation as a function of cathode-anode voltage; typical values INPUT VKA IK R1 Iref R2 Vref GND 006aab576 V KA = V ref 1 + R1 ------- + I ref R1 R2 Fig 8. Test circuit to Figure 6 and Figure 7 TL431 family Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 12 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator 006aab577 250 Ioff (nA) 200 150 100 50 0 -75 -25 25 75 125 Tamb (C) VKA = 36 V; Vref = 0 V Fig 9. Off-state current as a function of ambient temperature; typical values INPUT VKA Ioff GND 006aab578 VKA = 36 V; Vref = 0 V Fig 10. Off-state current as a function of ambient temperature; test circuit TL431 family Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 13 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator 006aab579 6 (1) Vin; Vout (V) 006aac478 6 (1) Vin; Vout (V) 4 4 (2) (2) 2 0 2 -1 0 1 3 5 7 t (s) Tamb = 25 C -1 1 3 5 7 t (s) Tamb = 25 C (1) Input (1) Input (2) Output (2) Output Fig 11. All types except TL431XFDT and TL431XSDT: Input voltage and output voltage as a function of time; typical values Fig 12. TL431XFDT: Input voltage and output voltage as a function of time; typical values 006aab580 6 (1) Vin; Vout (V) 4 220 VKA (2) PULSE GENERATOR f = 100 kHz 2 0 -1 1 3 5 7 50 GND t (s) 006aab581 Tamb = 25 C Tamb = 25 C (1) Input (2) Output Fig 13. TL431XSDT: Input voltage and output voltage as a function of time; typical values TL431 family Product data sheet Fig 14. Test circuit to Figure 11, Figure 12 and Figure 13 All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 14 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator 006aab583 60 Av (dB) 006aac479 60 Av (dB) 40 40 20 20 0 1 10 102 103 104 0 102 10 1 103 f (kHz) 104 f (kHz) IK = 10 mA; Tamb = 25 C IK = 10 mA; Tamb = 25 C Fig 15. All types except TL431XFDT and TL431XSDT: Voltage amplification as a function of frequency; typical values Fig 16. TL431XFDT: Voltage amplification as a function of frequency; typical values 006aab582 60 Av (dB) VKA 40 IK 15 k 232 9 F 20 8.25 k 0 1 10 102 103 GND 104 f (kHz) IK = 10 mA; Tamb = 25 C IK = 10 mA; Tamb = 25 C Fig 17. TL431XSDT: Voltage amplification as a function of frequency; typical values TL431 family Product data sheet aaa-017869 Fig 18. Test circuit to Figure 15, Figure 16 and Figure 17 All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 15 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator 006aab585 102 ZKA () 006aac480 102 ZKA () 10 10 1 1 10-1 1 10 102 103 104 10-1 1 102 10 f (kHz) 103 104 f (kHz) IK = 10 mA; Tamb = 25 C IK = 10 mA; Tamb = 25 C Fig 19. All types except TL431XFDT and TL431XSDT: Dynamic cathode-anode impedance as a function of frequency; typical values Fig 20. TL431XFDT: Dynamic cathode-anode impedance as a function of frequency; typical values 006aab586 102 ZKA () 10 VKA 1 k IK 1 50 10-1 1 10 102 103 104 GND f (kHz) IK = 10 mA; Tamb = 25 C IK = 10 mA; Tamb = 25 C Fig 21. TL431XSDT: Dynamic cathode-anode impedance as a function of frequency; typical values TL431 family Product data sheet 006aab587 Fig 22. Test circuit to Figure 19, Figure 20 and Figure 21 All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 16 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator 006aab588 100 IK (mA) 80 (1) (1) 60 Stable Oscillation Stable 40 20 0 1 102 10 103 104 CL (nF) Tamb = 25 C (1) VKA = Vref VKA = 5 V: no oscillation VKA = 10 V: no oscillation VKA = 15 V: no oscillation Fig 23. All types except TL431XFDT and TL431XSDT: Cathode current as a function of load capacitance; typical values 150 IK R1 = 10 k CL IK 150 CL VBATT VBATT R2 GND VKA = Vref Tamb = 25 C Fig 24. Test circuit (1) to Figure 23 TL431 family Product data sheet GND 006aab589 006aab590 VKA > 5 V: stable operation Tamb = 25 C Fig 25. Test circuit (2) to Figure 23 All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 17 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator 006aac481 100 IK (mA) 80 (1) (1) 60 Stable Oscillation Stable 40 20 0 10-1 1 10 102 103 104 CL (nF) Tamb = 25 C (1) VKA = Vref VKA = 5 V: no oscillation VKA = 10 V: no oscillation VKA = 15 V: no oscillation Fig 26. TL431XFDT: Cathode current as a function of load capacitance; typical values 150 IK R1 = 10 k CL IK 150 CL VBATT VBATT R2 GND GND 006aab589 VKA = Vref VKA > 5 V: stable operation Tamb = 25 C Tamb = 25 C Fig 27. Test circuit (1) to Figure 26 TL431 family Product data sheet 006aab590 Fig 28. Test circuit (2) to Figure 26 All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 18 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator 006aab591 100 IK (mA) 80 (1) (1) (2) (2) 60 Stable Oscillation Stable 40 20 0 10-1 1 10 102 103 104 CL (nF) Tamb = 25 C (1) VKA = Vref (2) VKA = 5 V VKA = 10 V: no oscillation VKA = 15 V: no oscillation Fig 29. TL431XSDT: Cathode current as a function of load capacitance; typical values 150 IK R1 = 10 k CL IK 150 CL VBATT VBATT R2 GND GND 006aab589 VKA = Vref VKA = 5 V Tamb = 25 C VKA > 10 V: stable operation 006aab590 Tamb = 25 C Fig 30. Test circuit (1) to Figure 29 TL431 family Product data sheet Fig 31. Test circuit (2) to Figure 29 All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 19 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator 10. Application information V+ VOUT R1 R2 006aab592 V OUT = 1 + R1 ------- V ref R2 Fig 32. Shunt regulator V+ VOUT R1 R2 006aab593 V OUT = 1 + R1 ------- V ref R2 V OUT min = V ref + V be Fig 33. Series pass regulator V+ VOUT VIN 006aab594 V th = V ref V IN V ref V OUT 0 V IN V ref V OUT 2V Fig 34. Single-supply comparator with temperature-compensated threshold TL431 family Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 20 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator RCL V+ IOUT 006aab595 V ref I OUT = --------R CL Fig 35. Constant current source V+ VOUT R1 R2 006aab596 V OUT = 1 + R1 ------- V ref R2 Fig 36. High-current shunt regulator V+ ISINK RS 006aab597 V ref I SINK = --------RS Fig 37. Constant current sink TL431 family Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 21 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator REGULATOR LINE VOUT GND R3 R1 REF R2 GND 006aac482 Fig 38. TL431 in control loop of SMPS 11. Test information 11.1 Quality information This product has been qualified in accordance with the Automotive Electronics Council (AEC) standard Q100 - Failure mechanism based stress test qualification for integrated circuits, and is suitable for use in automotive applications. 12. Package outline 3.0 2.8 1.1 0.9 3 0.45 0.15 2.5 1.4 2.1 1.2 1 2 1.9 Dimensions in mm 0.48 0.38 0.15 0.09 04-11-04 Fig 39. Package outline SOT23 (TO-236AB) TL431 family Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 22 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator 13. Soldering 3.3 2.9 1.9 solder lands solder resist 3 2 1.7 solder paste 0.6 (3x) 0.7 (3x) occupied area Dimensions in mm 0.5 (3x) 0.6 (3x) 1 sot023_fr Fig 40. Reflow soldering footprint SOT23 (TO-236AB) 2.2 1.2 (2x) 1.4 (2x) solder lands 4.6 solder resist 2.6 occupied area Dimensions in mm 1.4 preferred transport direction during soldering 2.8 4.5 sot023_fw Fig 41. Wave soldering footprint SOT23 (TO-236AB) TL431 family Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 23 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator 14. Revision history Table 11. Revision history Document ID Release date Data sheet status Change notice Supersedes TL431_FAM v.5 20150901 Product data sheet - TL431_FAM v.4 Modifications: * Figure 18: Capacitor value corrected TL431_FAM v.4 20110630 Product data sheet - TL431_FAM v.3 TL431_FAM v.3 20101105 Product data sheet - TL431_FAM v.2 TL431_FAM v.2 20100120 Product data sheet - TL431_FAM v.1 TL431_FAM v.1 20090806 Product data sheet - - TL431 family Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 24 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator 15. Legal information 15.1 Data sheet status Document status[1][2] Product status[3] Definition Objective [short] data sheet Development This document contains data from the objective specification for product development. Preliminary [short] data sheet Qualification This document contains data from the preliminary specification. Product [short] data sheet Production This document contains the product specification. [1] Please consult the most recently issued document before initiating or completing a design. [2] The term `short data sheet' is explained in section "Definitions". [3] The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status information is available on the Internet at URL http://www.nxp.com. 15.2 Definitions Draft -- The document is a draft version only. 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Product specification -- The information and data provided in a Product data sheet shall define the specification of the product as agreed between NXP Semiconductors and its customer, unless NXP Semiconductors and customer have explicitly agreed otherwise in writing. In no event however, shall an agreement be valid in which the NXP Semiconductors product is deemed to offer functions and qualities beyond those described in the Product data sheet. 15.3 Disclaimers Limited warranty and liability -- Information in this document is believed to be accurate and reliable. However, NXP Semiconductors does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. NXP Semiconductors takes no responsibility for the content in this document if provided by an information source outside of NXP Semiconductors. In no event shall NXP Semiconductors be liable for any indirect, incidental, punitive, special or consequential damages (including - without limitation - lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. Notwithstanding any damages that customer might incur for any reason whatsoever, NXP Semiconductors' aggregate and cumulative liability towards customer for the products described herein shall be limited in accordance with the Terms and conditions of commercial sale of NXP Semiconductors. Right to make changes -- NXP Semiconductors reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. This document supersedes and replaces all information supplied prior to the publication hereof. TL431 family Product data sheet Suitability for use in automotive applications -- This NXP Semiconductors product has been qualified for use in automotive applications. Unless otherwise agreed in writing, the product is not designed, authorized or warranted to be suitable for use in life support, life-critical or safety-critical systems or equipment, nor in applications where failure or malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage. NXP Semiconductors and its suppliers accept no liability for inclusion and/or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and/or use is at the customer's own risk. Applications -- Applications that are described herein for any of these products are for illustrative purposes only. NXP Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Customers are responsible for the design and operation of their applications and products using NXP Semiconductors products, and NXP Semiconductors accepts no liability for any assistance with applications or customer product design. It is customer's sole responsibility to determine whether the NXP Semiconductors product is suitable and fit for the customer's applications and products planned, as well as for the planned application and use of customer's third party customer(s). Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products. NXP Semiconductors does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer's applications or products, or the application or use by customer's third party customer(s). Customer is responsible for doing all necessary testing for the customer's applications and products using NXP Semiconductors products in order to avoid a default of the applications and the products or of the application or use by customer's third party customer(s). NXP does not accept any liability in this respect. Limiting values -- Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) will cause permanent damage to the device. Limiting values are stress ratings only and (proper) operation of the device at these or any other conditions above those given in the Recommended operating conditions section (if present) or the Characteristics sections of this document is not warranted. Constant or repeated exposure to limiting values will permanently and irreversibly affect the quality and reliability of the device. Terms and conditions of commercial sale -- NXP Semiconductors products are sold subject to the general terms and conditions of commercial sale, as published at http://www.nxp.com/profile/terms, unless otherwise agreed in a valid written individual agreement. In case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. NXP Semiconductors hereby expressly objects to applying the customer's general terms and conditions with regard to the purchase of NXP Semiconductors products by customer. All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 25 of 27 TL431 family NXP Semiconductors Adjustable precision shunt regulator No offer to sell or license -- Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication of any license under any copyrights, patents or other industrial or intellectual property rights. Translations -- A non-English (translated) version of a document is for reference only. The English version shall prevail in case of any discrepancy between the translated and English versions. Export control -- This document as well as the item(s) described herein may be subject to export control regulations. Export might require a prior authorization from competent authorities. 15.4 Trademarks Quick reference data -- The Quick reference data is an extract of the product data given in the Limiting values and Characteristics sections of this document, and as such is not complete, exhaustive or legally binding. Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. 16. Contact information For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com TL431 family Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 5 -- 01 September 2015 (c) NXP Semiconductors N.V. 2015. All rights reserved. 26 of 27 NXP Semiconductors TL431 family Adjustable precision shunt regulator 17. Contents 1 1.1 1.2 1.3 1.4 2 3 4 5 6 7 8 9 10 11 11.1 12 13 14 15 15.1 15.2 15.3 15.4 16 17 Product profile . . . . . . . . . . . . . . . . . . . . . . . . . . 1 General description . . . . . . . . . . . . . . . . . . . . . 1 Features and benefits . . . . . . . . . . . . . . . . . . . . 2 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Quick reference data . . . . . . . . . . . . . . . . . . . . 2 Pinning information . . . . . . . . . . . . . . . . . . . . . . 3 Ordering information . . . . . . . . . . . . . . . . . . . . . 4 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 5 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 6 Recommended operating conditions. . . . . . . . 7 Thermal characteristics . . . . . . . . . . . . . . . . . . 7 Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Application information. . . . . . . . . . . . . . . . . . 20 Test information . . . . . . . . . . . . . . . . . . . . . . . . 22 Quality information . . . . . . . . . . . . . . . . . . . . . 22 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 22 Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Revision history . . . . . . . . . . . . . . . . . . . . . . . . 24 Legal information. . . . . . . . . . . . . . . . . . . . . . . 25 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 25 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Contact information. . . . . . . . . . . . . . . . . . . . . 26 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Please be aware that important notices concerning this document and the product(s) described herein, have been included in section `Legal information'. (c) NXP Semiconductors N.V. 2015. All rights reserved. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com Date of release: 01 September 2015 Document identifier: TL431 family