TL431 TL432. Automotive adjustable voltage reference. Applications. Description. Features. Power supply Industrial Automotive

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1 TL431 TL432 Automotive adjustable voltage reference Applications Datasheet production data Z TO92 (Plastic package) L SOT235 L SOT233 C SOT3236 Power supply Industrial Automotive Description The TL431 and TL432 are adjustable shunt voltage references with guaranteed temperature stability over the entire operating temperature range. The device temperature range is extended for the automotive version from 40 C up to +125 C. The output voltage can be set to any value between 2.5 and 36 V with two external resistors. The TL431 and TL432 operate with a wide current range from 1 to 100 ma with a typical dynamic impedance of 0.22 Ω. D SO8 (Batwing plastic micropackage) Features AECQ100 qualified Adjustable output voltage: 2.5 to 36 V Sink current capability: 1 to 100 ma Typical output impedance: 0.22 Ω 1% and 2% voltage precision Automotive temp. range 40 C to +125 C December 2017 DocID4467 Rev 12 1/21 This is information on a product in full production.

2 Contents TL431, TL432 Contents 1 Schematic diagrams Absolute maximum ratings and operating conditions Electrical characteristics Reference input voltage deviation over temperature range Package information SO8 package information TO92 ammopack and tape and reel package information TO92 (bulk) package information SOT233 package information SOT235 package information SOT3236 package information Ordering information Revision history /21 DocID4467 Rev 12

3 TL431, TL432 Schematic diagrams 1 Schematic diagrams Figure 1. TO92 pin connections (top view) Figure 2. SO8 batwing pin connections (top view) SO8 Cathode 1 Anode 2 3 NC Ref Anode NC Figure 3. SOT235 and SOT233 pin connections (top view) SOT235 SOT233 NC NC Anode Cathode 1 Cathode 3 4 Ref Ref 2 3 Anode TL431 TL431 TL432 Figure 4. SOT3236 pin connections (top view) Figure 5. TL431 and TL432 block diagram Cathode Ref Vref Anode DocID4467 Rev 12 3/21 21

4 Absolute maximum ratings and operating conditions TL431, TL432 2 Absolute maximum ratings and operating conditions Table 1. Absolute maximum ratings Symbol Parameter Value Unit V KA Cathode to anode voltage 37 V I k Continuous cathode current range 100 to +150 ma I ref Reference input current range 0.05 to +10 ma R thjc Thermal resistance junction to case TO92 SO8 batwing SOT233L SOT235L SOT3236L C/W R thja Thermal resistance junction to ambient TO92 SO8 batwing SOT233L SOT235L SOT3236L T stg Storage temperature range 65 to +150 C T J Junction temperature 150 C ESD TL431IY, TL431AIYT: HBM (human body model) (1) TL431TL432: HBM (human body model) MM: machine model (2) CDM: charged device model (3) 1. Human body model: a 100 pf capacitor is charged to the specified voltage, then discharged through a 1.5 k resistor between two pins of the device. This is done for all couples of connected pin combinations while the other pins are floating. 2. Machine model: a 200 pf capacitor is charged to the specified voltage, then discharged directly between two pins of the device with no external series resistor (internal resistor < 5 ). This is done for all couples of connected pin combinations while the other pins are floating. 3. Charged device model: all pins and the package are charged together to the specified voltage and then discharged directly to the ground through only one pin. This is done for all pins. Table 2. Operating conditions Symbol Parameter Value Unit V KA Cathode to anode voltage V ref to 36 V I k Cathode current 1 to 100 ma C/W V T oper Operating freeair temperature range TL431C/AC TL431I/AI TL432I/AI TL431IY/AIY 0 to to to +125 C 4/21 DocID4467 Rev 12

5 TL431, TL432 Electrical characteristics 3 Electrical characteristics Table 3. TL431C (T amb = 25 C unless otherwise specified) Symbol Parameter TL431C TL431AC Min. Typ. Max. Min. Typ. Max. Unit V ref V ref Reference input voltage V KA = V ref, I k = 10 ma, T amb = 25 C T min T amb T max Reference input voltage deviation overtemperature range (1) V KA = V ref, I k = 10 ma, T min T amb T max V mv Vref Vka Ratio of change in reference input voltage to change in cathode to anode voltage I k = 10 ma V KA = 10 V to V ref V KA = 36 V to 10 V mv/v I ref Reference input current I k = 10 ma, R1 = 10 k, R2 = T amb = 25 C T min T amb T max µa I ref Reference input current deviation overtemperature range I k = 10 ma, R1 = 10 k, R2 = T min T amb T max µa Minimum cathode current for regulation I min ma V KA = V ref I off Offstate cathode current na ZKA Dynamic impedance(2) V KA = V ref, I k = 1 to 100 ma, f 1 khz See definition of Section : Reference input voltage deviation overtemperature range. 2. The dynamic impedance is defined as ZKA = V KA I k DocID4467 Rev 12 5/21 21

6 Electrical characteristics TL431, TL432 Table 4. TL431I/TL432I (T amb = 25 C unless otherwise specified) Symbol Parameter TL431I/TL432I TL431AI/TL432AI Min. Typ. Max. Min. Typ. Max. Unit V ref V ref Reference input voltage V KA = V ref, I k = 10 ma, T amb = 25 C 2.44 T min T amb T max Reference input voltage deviation overtemperature range (1) V KA = V ref, I k =10 ma, T min T amb T max mv V Vref Vka Ratio of change in reference input voltage to change in cathode to anode voltage I k = 10 ma, V KA = 10 V to V ref V KA = 36 V to 10 V mv/v I ref I ref Reference input current I k = 10 ma, R1 = 10 k, R2 = T amb = 25 C T min T amb T max Reference input current deviation overtemperature range I k = 10 ma, R1 = 10 k, R2 = T min T amb T max µa I min Minimum cathode current for regulation V KA = V ref ma I off Offstate cathode current na µa ZKA Dynamic impedance(2) V KA = V ref, I k = 1 to 100 ma, f 1kHZ See definition of Section : Reference input voltage deviation overtemperature range below. 2. The dynamic impedance is defined as ZKA = V KA I k 6/21 DocID4467 Rev 12

7 TL431, TL432 Electrical characteristics Table 5. TL431IY (T amb = 25 C unless otherwise specified) Symbol Parameter TL431IY TL431AIY Min. Typ. Max. Min. Typ. Max. Unit V ref Reference input voltage V KA = V ref, I k = 10 ma 2.44 T min T amb T max V V ref Reference input voltage deviation overtemperature range (1) V KA = V ref, I k = 10 ma, T min T amb T max mv Vref Vka Ratio of change in reference input voltage to change in cathode to anode voltage I k = 10 ma, V KA = 10 V to V ref I k = 10 ma, V KA = 36 V to 10 V mv/v I ref I ref I min I off Reference input current I k = 10 ma, R1 = 10 k, R2 = T min T amb T max Reference input current deviation overtemperature range I k = 10 ma, R1 = 10 k, R2 = T min T amb T max µa Minimum cathode current for regulation V KA = V ref ma Offstate cathode current T min T amb T max µa na ZKA Dynamic impedance(2) V KA = V ref, I k = 1 to 100 ma, F 1kHz See definition of Section : Reference input voltage deviation overtemperature range below. 2. The dynamic impedance is defined as ZKA = V KA I k Reference input voltage deviation overtemperature range V ref is defined as the difference between the maximum and minimum values obtained over the full temperature range. V ref = V ref max V ref min Figure 6. Reference input voltage deviation overtemperature range DocID4467 Rev 12 7/21 21

8 Electrical characteristics TL431, TL432 Figure 7. Test circuit for V KA = V ref Figure 8. Test circuit for programming mode Input R Output Input R Output I K I K =10mA R1 I REF V KA V KA R2 V REF V REF V KA = V REF 1 + R1 R2 + R1 x I REF Figure 9. Test circuit for I off V KA =36V Figure 10. Test circuit for phase margin and voltage gain 10 F I OFF Input 10 F 15k 8.25k V REF I K =10mA Output Figure 11. Test circuit for response time Figure 12. Reference voltage vs. temperature ma 1 ma I K =1mA Output Cathode voltage V KA (V) V KA = V REF I K = 10 ma Temperature ( C) 8/21 DocID4467 Rev 12

9 TL431, TL432 Electrical characteristics Figure 13. Reference voltage vs. cathode current Figure 14. Zoom on reference voltage vs. cathode current Figure 15. Reference current vs. temperature Figure 16. Offstate cathode current vs. temperature Reference current I REF ( A) I K =10 ma R 1 =10k R2= + Offstate current I OFF ( A) V KA = 36 V V REF = 0 V Temperature C Temperature ( C) Figure 17. Ratio of change in V ref to change in V KA vs. temperature 0.0 Figure 18. Static impedance R KA vs. temperature 0.20 V REF / V KA (mv / V) I K = 10 ma Static impedance R KA ( ) V KA =V REF Temperature ( C) Temperature ( C) DocID4467 Rev 12 9/21 21

10 Electrical characteristics TL431, TL432 Figure 19. Minimum operating current vs. temperature Figure 20. Gain and phase vs. frequency 0.6 Minimum cathode current I MIN (ma) V KA = V REF Temperature ( C) Figure 21. Stability behavior with capacitive loads Figure 22. Maximum power dissipation Figure 23. Pulse response for I k = 1 ma 10/21 DocID4467 Rev 12

11 TL431, TL432 Package information 4 Package information In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: ECOPACK is an ST trademark. DocID4467 Rev 12 11/21 21

12 Package information TL431, TL SO8 package information Figure 24. SO8 package outline Table 6. SO8 package mechanical data Dimensions Symbol Millimeters Inches Min. Typ. Max. Min. Typ. Max. A A A b c D E E e h L L k ccc /21 DocID4467 Rev 12

13 TL431, TL432 Package information 4.2 TO92 ammopack and tape and reel package information Figure 25. TO92 ammopack and tape and reel package outline Table 7. TO92 ammopack and tape and reel package mechanical data Symbol Dimension (millimeters) Dimension (Inches) Min. Typ. Max. Min. Typ. Max. A A T d I P PO P F1/F h P W W W W H H H DO L DocID4467 Rev 12 13/21 21

14 Package information TL431, TL TO92 (bulk) package information Figure 26. TO92 bulk package outline _H Table 8. TO92 bulk package mechanical data Symbol Dimension (millimeters) Dimension (Inches) Min. Typ. Max. Min. Typ. Max. A B C D E F a /21 DocID4467 Rev 12

15 TL431, TL432 Package information 4.4 SOT233 package information Figure 27. SOT233 package outline Table 9. SOT233 package mechanical data Dimensions Symbol Millimeters Inches Min. Typ. Max. Min. Typ. Max. A A A b c D E E e e L L k 0d 8d DocID4467 Rev 12 15/21 21

16 Package information TL431, TL SOT235 package information Figure 28. SOT235 package outline _I Table 10. SOT235 package mechanical data Dimensions Symbol Millimeters Inches Min. Typ. Max. Min. Typ. Max. A A A b c D E e H L degrees 10 degrees 16/21 DocID4467 Rev 12

17 TL431, TL432 Package information 4.6 SOT3236 package information Figure 29. SOT3236 package outline _E Table 11. SOT3236 package mechanical data Dimensions Symbol Millimeters Inches Min. Typ. Max. Min. Typ. Max. A A A b c D E e HE L Q DocID4467 Rev 12 17/21 21

18 Ordering information TL431, TL432 5 Ordering information Table 12. Order codes Order code Accuracy (%) Temperature range Package Packing Marking TL431CD TL431CDT TL431ACD TL431ACDT TL431CZ TL431CZT TL431CZAP TL431ACZ TL431ACZT TL431ACZAP 2 431C Tube or SO8 Tape and reel 1 431AC 2 TL431C Bulk or TO92 Tape or Ammopack 1 0 C to +70 C TL431AC TL431CL3T 2 L19 SOT233 TL431ACL3T 1 L18 TL431CL5T 2 L19 SOT235 Tape TL431ACL5T 1 L18 TL431CCT 2 31C SOT3236 TL431ACCT 1 31C TL431ID TL431IDT TL431AID TL431AIDT TL431IZ TL431IZT TL431IZAP TL431AIZ TL431AIZT TL431AIZAP 2 431I Tube or SO8 tape and reel 1 431AI 2 TL431I Bulk or TO92 Tape or Ammopack 1 TL431AI 40 C to C TL431IL3T 2 L17 SOT233 TL431AIL3T 1 L16 TL432IL3T 2 32I SOT233 TL432AIL3T 1 32AI Tape TL431IL5T 2 L17 SOT235 TL431AIL5T 1 L16 TL431ICT 2 31I SOT3236 TL431AICT 1 31I 18/21 DocID4467 Rev 12

19 TL431, TL432 Ordering information Table 12. Order codes (continued) Order code Accuracy (%) Temperature range Package Packing Marking TL431IYD (1) TL431IYDT (1) 2 SO8 431IY Tube or 40 C to C (Automotive TL431AIYD (1) tape and reel grade level) TL431AIYDT (1) 1 431AIY 1. Qualification and characterization according to AEC Q100 and Q003 or equivalent, advanced screening according to AEC Q001 and Q 002 or equivalent. DocID4467 Rev 12 19/21 21

20 Revision history TL431, TL432 6 Revision history Table 13. Document revision history Date Revision Changes 01Mar Initial release. 01Nov PPAP references inserted in order codes table on cover page. 13Dec Corrected TO92 package information. 08Jun Feb Specified that SO8 package is batwing package. In electrical characteristics tables, moved negative values from max column to min column. Corrected captions of Figure 7 and of Figure 18. Added footnote to Table 8: TO92 bulk package mechanical data. Corrected SO8 package mechanical data. Corrected footnote for automotive grade order codes in order code table. Corrected packing information for TO92 devices in order code table. 04Jun Changed I MIN to 0.6 ma in Table 3 and Table 4. Increased temperature range to 125 C in temperature curves. Added Table 5, dedicated to automotive version. Increased high temperature for automotive range up to +125 C in Table 5 and in Table 12: Order codes. Inserted accuracy column in Table Jun Corrected minor error in package column in Table Mar Oct Nov Dec Dec Added Figure 3 on page 3, Section 4.4 on page 15 and Section 4.5 on page 16. Added new package mechanical data Table 11 on page 17 and Figure 29 on page 17. Updated Table 12 on page 18. Added new part number TL432, new order code Table 12 on page 18 and pin connection for TL432 Figure 3 on page 3. Removed temperature range in title Table 3 on page 5, Table 4 on page 6 and Table 5 on page 7. Updated main title on page 1 and Section : Features on page 1, (added automotive AECQ100 qualified). Updated Table 1 on page 4 (updated R thja and R thjc ). Minor modifications throughout document. 20/21 DocID4467 Rev 12

21 TL431, TL432 IMPORTANT NOTICE PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries ( ST ) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document STMicroelectronics All rights reserved DocID4467 Rev 12 21/21 21