TL431 family Adjustable precision shunt regulator Rev. 02 — 20 January 2010 Product data sheet 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. Table 1. Product overview Reference voltage tolerance (Vref) Temperature range (Tamb) 0 to 70 °C −40 to 85 °C −40 to 125 °C Pinning configuration (see Table 5) 2% TL431CDBZR TL431IDBZR TL431QDBZR normal pinning TL431SDT normal pinning TL431MSDT mirrored pinning 1% 0.5 % TL431ACDBZR TL431AIDBZR TL431BCDBZR TL431BIDBZR TL431AQDBZR normal pinning TL431ASDT normal pinning TL431AMSDT mirrored pinning TL431BQDBZR normal pinning TL431BSDT normal pinning TL431BMSDT mirrored pinning 2. Features 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 Ω Sink current capability: 1 mA to 100 mA AEC-Q100 qualified (grade 1) 3. Applications Shunt regulator Precision current limiter Precision constant current sink TL431 family NXP Semiconductors Adjustable precision shunt regulator 4. Quick reference data Table 2. Quick reference data Symbol Parameter VKA Conditions Min Typ Max Unit cathode-anode voltage Vref - 36 V IK cathode current 1 - 100 mA Vref reference voltage 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 5. Ordering information Table 3. Ordering information Type number TL431CDBZR Package Name Description Version - plastic surface-mounted package; 3 leads SOT23 TL431IDBZR TL431QDBZR TL431SDT TL431MSDT TL431ACDBZR TL431AIDBZR TL431AQDBZR TL431ASDT TL431AMSDT TL431BCDBZR TL431BIDBZR TL431BQDBZR TL431BSDT TL431BMSDT TL431_FAM_2 Product data sheet © NXP B.V. 2010. All rights reserved. Rev. 02 — 20 January 2010 2 of 23 TL431 family NXP Semiconductors Adjustable precision shunt regulator 6. Marking Table 4. Marking codes Type number Marking code[1] Type number Marking code[1] TL431CDBZR CA* TL431ASDT RL* TL431IDBZR CB* TL431AMSDT LQ* TL431QDBZR CC* TL431BCDBZR CG* TL431SDT RM* TL431BIDBZR CH* TL431MSDT LR* TL431BQDBZR CJ* TL431ACDBZR CD* TL431BSDT MA* TL431AIDBZR CE* TL431BMSDT MB* TL431AQDBZR CF* - - [1] * = -: made in Hong Kong * = p: made in Hong Kong * = t: made in Malaysia * = W: made in China 7. 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 Ω. 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. Functional diagram TL431_FAM_2 Product data sheet 006aab569 © NXP B.V. 2010. All rights reserved. Rev. 02 — 20 January 2010 3 of 23 TL431 family NXP Semiconductors Adjustable precision shunt regulator 8. Pinning information Table 5. Pinning Pin Symbol Description Simplified outline Graphic symbol Normal pinning: All types except TL431AMSDT, TL431BMSDT and TL431MSDT 1 k cathode 2 REF reference 3 a anode REF 3 a 1 2 k 006aab355 Mirrored pinning: TL431AMSDT, TL431BMSDT and TL431MSDT 1 REF reference 2 k cathode 3 a anode REF 3 a 1 2 k 006aab355 9. 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 Ptot total power dissipation −0.05 10 mA [1] - 350 mW [2] - 580 mW [3] - 950 mW - 150 °C TL431XCDBZR 0 +70 °C TL431XIDBZR −40 +85 °C TL431XQDBZR TL431XSDT −40 +125 °C storage temperature −65 +150 °C Tj junction temperature Tamb ambient temperature Tstg Tamb ≤ 25 °C [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 collector 1 cm2. [3] Device mounted on a ceramic PCB, Al2O3, standard footprint. TL431_FAM_2 Product data sheet © NXP B.V. 2010. All rights reserved. Rev. 02 — 20 January 2010 4 of 23 TL431 family NXP Semiconductors Adjustable precision shunt regulator 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 collector 1 cm2 (3) FR4 PCB, standard footprint Fig 2. Power derating curves 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 10. Recommended operating conditions Table 8. Operating conditions Symbol Parameter Conditions VKA cathode-anode voltage Vref 36 V IK cathode current 1 100 mA TL431_FAM_2 Product data sheet Min Max Unit © NXP B.V. 2010. All rights reserved. Rev. 02 — 20 January 2010 5 of 23 TL431 family NXP Semiconductors Adjustable precision shunt regulator 11. Thermal characteristics Table 9. Symbol Rth(j-a) Rth(j-sp) Thermal characteristics Parameter Conditions thermal resistance from junction to ambient 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 collector 1 cm2. [3] Device mounted on a ceramic PCB, Al2O3, standard footprint. [4] Soldering point at pin 3. 12. Characteristics Table 10. Symbol Characteristics Parameter Conditions Min Typ Max Unit Standard-Grade (2 %): TL431CDBZR; TL431IDBZR; TL431QDBZR; TL431SDT; TL431MSDT Vref reference voltage VKA = Vref; IK = 10 mA ΔVref 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 TL431SDT TL431MSDT Tamb = −40 °C to 125 °C ΔVKA = 10 V to Vref - −1.4 −2.7 mV/V ΔVKA = 36 V to 10 V - −1 −2 mV/V - 2 4 μA ΔVref/ΔVKA reference voltage variation to cathode-anode voltage variation ratio IK = 10 mA Iref reference current IK = 10 mA; R1 = 10 kΩ; R2 = open ΔIref reference current variation IK = 10 mA; R1 = 10 kΩ; R2 = open TL431CDBZR Tamb = 0 °C to 70 °C - 0.4 1.2 μA TL431IDBZR Tamb = −40 °C to 85 °C - 0.8 2.5 μA TL431QDBZR TL431SDT TL431MSDT Tamb = −40 °C to 125 °C mA IK(min) minimum cathode current VKA = Vref - 0.4 1 Ioff off-state current VKA = 36 V; Vref = 0 - 0.1 1 μA ZKA dynamic cathode-anode impedance IK = 1 mA to 100 mA; VKA = Vref; f < 1 kHz - 0.2 0.5 Ω TL431_FAM_2 Product data sheet © NXP B.V. 2010. All rights reserved. Rev. 02 — 20 January 2010 6 of 23 TL431 family NXP Semiconductors Adjustable precision shunt regulator Table 10. Symbol Characteristics …continued Parameter Conditions Min Typ Max Unit A-Grade (1 %): TL431ACDBZR; TL431AIDBZR; TL431AQDBZR; TL431ASDT; TL431AMSDT Vref reference voltage VKA = Vref; IK = 10 mA ΔVref reference voltage variation VKA = Vref; IK = 10 mA 2495 2520 mV TL431ACDBZR Tamb = 0 °C to 70 °C - 6 16 mV TL431AIDBZR Tamb = −40 °C to 85 °C - 14 34 mV TL431AQDBZR TL431ASDT TL431AMSDT Tamb = −40 °C to 125 °C ΔVKA = 10 V to Vref - −1.4 −2.7 mV/V ΔVKA = 36 V to 10 V - −1 −2 mV/V - 2 4 μA ΔVref/ΔVKA reference voltage variation to cathode-anode voltage variation ratio IK = 10 mA Iref reference current IK = 10 mA; R1 = 10 kΩ; R2 = open ΔIref reference current variation IK = 10 mA; R1 = 10 kΩ; R2 = open IK(min) 2470 TL431ACDBZR Tamb = 0 °C to 70 °C - 0.4 1.2 μA TL431AIDBZR Tamb = −40 °C to 85 °C - 0.8 2.5 μA TL431AQDBZR TL431ASDT TL431AMSDT Tamb = −40 °C to 125 °C minimum cathode current VKA = Vref TL431ACDBZR Tamb = 0 °C to 70 °C - 0.4 0.6 mA TL431AIDBZR Tamb = −40 °C to 85 °C - 0.4 0.7 mA TL431AQDBZR TL431ASDT TL431AMSDT Tamb = −40 °C to 125 °C Ioff off-state current VKA = 36 V; Vref = 0 - 0.1 0.5 μA ZKA dynamic cathode-anode impedance IK = 1 mA to 100 mA; VKA = Vref; f < 1 kHz - 0.2 0.5 Ω B-Grade (0.5 %): TL431BCDBZR; TL431BIDBZR; TL431BQDBZR; TL431BSDT; TL431BMSDT Vref reference voltage VKA = Vref; IK = 10 mA ΔVref 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 TL431BSDT TL431BMSDT Tamb = −40 °C to 125 °C ΔVKA = 10 V to Vref - −1.4 −2.7 mV/V ΔVKA = 36 V to 10 V - −1 −2 mV/V - 2 4 μA ΔVref/ΔVKA reference voltage variation to cathode-anode voltage variation ratio Iref 2483 reference current IK = 10 mA IK = 10 mA; R1 = 10 kΩ; R2 = open TL431_FAM_2 Product data sheet © NXP B.V. 2010. All rights reserved. Rev. 02 — 20 January 2010 7 of 23 TL431 family NXP Semiconductors Adjustable precision shunt regulator Table 10. Characteristics …continued Symbol Parameter Conditions ΔIref reference current variation IK = 10 mA; R1 = 10 kΩ; R2 = open IK(min) Min Typ Max Unit TL431BCDBZR Tamb = 0 °C to 70 °C - 0.4 1.2 μA TL431BIDBZR Tamb = −40 °C to 85 °C - 0.8 2.5 μA TL431BQDBZR TL431BSDT TL431BMSDT Tamb = −40 °C to 125 °C minimum cathode current VKA = Vref TL431BCDBZR Tamb = 0 °C to 70 °C - 0.4 0.6 mA TL431BIDBZR Tamb = −40 °C to 85 °C - 0.4 0.7 mA TL431BQDBZR TL431BSDT TL431BMSDT Tamb = −40 °C to 125 °C Ioff off-state current VKA = 36 V; Vref = 0 - 0.1 0.5 μA ZKA dynamic cathode-anode impedance IK = 1 mA to 100 mA; VKA = Vref; f < 1 kHz - 0.2 0.5 Ω TL431_FAM_2 Product data sheet © NXP B.V. 2010. All rights reserved. Rev. 02 — 20 January 2010 8 of 23 TL431 family NXP Semiconductors Adjustable precision shunt regulator 006aab571 2.60 Vref (V) IK (mA) 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_FAM_2 Product data sheet © NXP B.V. 2010. All rights reserved. Rev. 02 — 20 January 2010 9 of 23 TL431 family NXP Semiconductors Adjustable precision shunt regulator 006aab574 5.0 006aab575 0 Iref (μA) ΔVref (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 kΩ; 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 Fig 8. R1 V KA = V ref × ⎛ 1 + -------⎞ + I ref × R1 ⎝ R2⎠ Test circuit to Figure 6 and Figure 7 TL431_FAM_2 Product data sheet © NXP B.V. 2010. All rights reserved. Rev. 02 — 20 January 2010 10 of 23 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_FAM_2 Product data sheet © NXP B.V. 2010. All rights reserved. Rev. 02 — 20 January 2010 11 of 23 TL431 family NXP Semiconductors Adjustable precision shunt regulator 006aab579 6 (1) Vin; Vout (V) 006aab580 6 (1) Vin; Vout (V) 4 4 (2) (2) 2 0 2 −1 0 1 3 5 7 t (μs) Tamb = 25 °C −1 1 3 5 7 t (μs) Tamb = 25 °C (1) Input (1) Input (2) Output (2) Output Fig 11. All types except TL431XSDT: Input voltage and output voltage as a function of time; typical values Fig 12. TL431XSDT: Input voltage and output voltage as a function of time; typical values 220 Ω VKA PULSE GENERATOR f = 100 kHz 50 Ω GND 006aab581 Tamb = 25 °C Fig 13. Test circuit to Figure 11 and Figure 12 TL431_FAM_2 Product data sheet © NXP B.V. 2010. All rights reserved. Rev. 02 — 20 January 2010 12 of 23 TL431 family NXP Semiconductors Adjustable precision shunt regulator 006aab583 60 006aab582 60 Av (dB) Av (dB) 40 40 20 20 0 1 10 102 103 0 104 10 1 102 f (kHz) 103 104 f (kHz) IK = 10 mA; Tamb = 25 °C IK = 10 mA; Tamb = 25 °C Fig 14. All types except TL431XSDT: Voltage amplification as a function of frequency; typical values Fig 15. TL431XSDT: Voltage amplification as a function of frequency; typical values VKA 15 kΩ 232 Ω IK 9 pF 8.25 kΩ GND 006aab584 IK = 10 mA; Tamb = 25 °C Fig 16. Test circuit to Figure 14 and Figure 15 TL431_FAM_2 Product data sheet © NXP B.V. 2010. All rights reserved. Rev. 02 — 20 January 2010 13 of 23 TL431 family NXP Semiconductors Adjustable precision shunt regulator 006aab585 102 006aab586 102 ZKA (Ω) ZKA (Ω) 10 10 1 1 10−1 1 10 102 103 10−1 104 1 10 102 f (kHz) 103 104 f (kHz) IK = 10 mA; Tamb = 25 °C IK = 10 mA; Tamb = 25 °C Fig 17. All types except TL431XSDT: Dynamic cathode-anode impedance as a function of frequency; typical values Fig 18. TL431XSDT: Dynamic cathode-anode impedance as a function of frequency; typical values VKA 1 kΩ IK 50 Ω GND 006aab587 IK = 10 mA; Tamb = 25 °C Fig 19. Test circuit to Figure 17 and Figure 18 TL431_FAM_2 Product data sheet © NXP B.V. 2010. All rights reserved. Rev. 02 — 20 January 2010 14 of 23 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 20. All types except TL431XSDT: Cathode current as a function of load capacitance; typical values 150 Ω IK R1 = 10 kΩ CL IK 150 Ω CL VBATT VBATT R2 GND GND 006aab589 VKA = Vref VKA > 5 V: stable operation Tamb = 25 °C Tamb = 25 °C Fig 21. Test circuit (1) to Figure 20 Fig 22. Test circuit (2) to Figure 20 TL431_FAM_2 Product data sheet 006aab590 © NXP B.V. 2010. All rights reserved. Rev. 02 — 20 January 2010 15 of 23 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 23. TL431XSDT: Cathode current as a function of load capacitance; typical values 150 Ω IK R1 = 10 kΩ CL IK 150 Ω 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 24. Test circuit (1) to Figure 23 Fig 25. Test circuit (2) to Figure 23 TL431_FAM_2 Product data sheet © NXP B.V. 2010. All rights reserved. Rev. 02 — 20 January 2010 16 of 23 TL431 family NXP Semiconductors Adjustable precision shunt regulator 13. Application information V+ VOUT R1 R2 006aab592 R1 V OUT = ⎛ 1 + -------⎞ × V ref ⎝ R2⎠ Fig 26. Shunt regulator V+ VOUT R1 R2 006aab593 R1 V OUT = ⎛ 1 + -------⎞ × V ref ; V OUT ( min ) = V ref + V be ⎝ R2⎠ Fig 27. 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 28. Single-supply comparator with temperature-compensated threshold TL431_FAM_2 Product data sheet © NXP B.V. 2010. All rights reserved. Rev. 02 — 20 January 2010 17 of 23 TL431 family NXP Semiconductors Adjustable precision shunt regulator RCL V+ IOUT 006aab595 V ref I OUT = --------R CL Fig 29. Constant current source V+ VOUT R1 R2 006aab596 R1 V OUT = ⎛ 1 + -------⎞ × V ref ⎝ R2⎠ Fig 30. High-current shunt regulator V+ ISINK RS 006aab597 V ref I SINK = --------RS Fig 31. Constant current sink 14. Test information 14.1 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. TL431_FAM_2 Product data sheet © NXP B.V. 2010. All rights reserved. Rev. 02 — 20 January 2010 18 of 23 TL431 family NXP Semiconductors Adjustable precision shunt regulator 15. 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 0.48 0.38 Dimensions in mm 0.15 0.09 04-11-04 Fig 32. Package outline SOT23 (TO-236AB) 16. Packing information Table 11. Packing methods The indicated -xxx are the last three digits of the 12NC ordering code.[1] Type number TL431CDBZR Package SOT23 Description 4 mm pitch, 8 mm tape and reel Packing quantity 3000 10000 -215 -235 TL431IDBZR TL431QDBZR TL431SDT TL431MSDT TL431ACDBZR TL431AIDBZR TL431AQDBZR TL431ASDT TL431AMSDT TL431BCDBZR TL431BIDBZR TL431BQDBZR TL431BSDT TL431BMSDT [1] For further information and the availability of packing methods, see Section 20. TL431_FAM_2 Product data sheet © NXP B.V. 2010. All rights reserved. Rev. 02 — 20 January 2010 19 of 23 TL431 family NXP Semiconductors Adjustable precision shunt regulator 17. Soldering 3.3 2.9 1.9 solder lands solder resist 3 2 1.7 solder paste 0.6 (3×) 0.7 (3×) occupied area Dimensions in mm 0.5 (3×) 0.6 (3×) 1 sot023_fr Fig 33. Reflow soldering footprint SOT23 (TO-236AB) 2.2 1.2 (2×) 1.4 (2×) 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 34. Wave soldering footprint SOT23 (TO-236AB) TL431_FAM_2 Product data sheet © NXP B.V. 2010. All rights reserved. Rev. 02 — 20 January 2010 20 of 23 TL431 family NXP Semiconductors Adjustable precision shunt regulator 18. Revision history Table 12. Revision history Document ID Release date Data sheet status Change notice Supersedes TL431_FAM_2 20100120 Product data sheet - TL431_FAM_1 Modifications: TL431_FAM_1 • • Type numbers TL431BSDT and TL431BMSDT added Section 7 “Functional diagram”: figure reference updated 20090806 Product data sheet TL431_FAM_2 Product data sheet - - © NXP B.V. 2010. All rights reserved. Rev. 02 — 20 January 2010 21 of 23 TL431 family NXP Semiconductors Adjustable precision shunt regulator 19. Legal information 19.1 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. 19.2 Definitions Draft — The document is a draft version only. The content is still under internal review and subject to formal approval, which may result in modifications or additions. NXP Semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information. Short data sheet — A short data sheet is an extract from a full data sheet with the same product type number(s) and title. A short data sheet is intended for quick reference only and should not be relied upon to contain detailed and full information. For detailed and full information see the relevant full data sheet, which is available on request via the local NXP Semiconductors sales office. In case of any inconsistency or conflict with the short data sheet, the full data sheet shall prevail. 19.3 Disclaimers General — 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. 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. Suitability for use — NXP Semiconductors products are not designed, authorized or warranted to be suitable for use in medical, military, aircraft, space or life support 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 accepts 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. Limiting values — Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) may cause permanent damage to the device. Limiting values are stress ratings only and operation of the device at these or any other conditions above those given in the Characteristics sections of this document is not implied. Exposure to limiting values for extended periods may affect device reliability. Terms and conditions of 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, including those pertaining to warranty, intellectual property rights infringement and limitation of liability, unless explicitly otherwise agreed to in writing by NXP Semiconductors. In case of any inconsistency or conflict between information in this document and such terms and conditions, the latter will prevail. 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. 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 national authorities. 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. 19.4 Trademarks Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. 20. Contact information For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: [email protected] TL431_FAM_2 Product data sheet © NXP B.V. 2010. All rights reserved. Rev. 02 — 20 January 2010 22 of 23 TL431 family NXP Semiconductors Adjustable precision shunt regulator 21. Contents 1 2 3 4 5 6 7 8 9 10 11 12 13 14 14.1 15 16 17 18 19 19.1 19.2 19.3 19.4 20 21 General description . . . . . . . . . . . . . . . . . . . . . . 1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Quick reference data . . . . . . . . . . . . . . . . . . . . . 2 Ordering information . . . . . . . . . . . . . . . . . . . . . 2 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 3 Pinning information . . . . . . . . . . . . . . . . . . . . . . 4 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 4 Recommended operating conditions. . . . . . . . 5 Thermal characteristics . . . . . . . . . . . . . . . . . . 6 Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Application information. . . . . . . . . . . . . . . . . . 17 Test information . . . . . . . . . . . . . . . . . . . . . . . . 18 Quality information . . . . . . . . . . . . . . . . . . . . . 18 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 19 Packing information . . . . . . . . . . . . . . . . . . . . 19 Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Revision history . . . . . . . . . . . . . . . . . . . . . . . . 21 Legal information. . . . . . . . . . . . . . . . . . . . . . . 22 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 22 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Contact information. . . . . . . . . . . . . . . . . . . . . 22 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’. © NXP B.V. 2010. All rights reserved. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: [email protected] Date of release: 20 January 2010 Document identifier: TL431_FAM_2