Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsVoltage RegulatorsTL431ACDT

This is information on a product in full production.

December 2012 Doc ID 4467 Rev 11 1/21

TL431

TL432

Programmable voltage reference

Datasheet − production data

Features

■ 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

Applications

■ Power supply

■ Industrial

■ Automotive

Description

The TL431 and TL432 are programmable 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.

SO-8

(Batwing plastic micropackage)

TO-92

(Plastic package)

SOT23-3

SOT23-5

SOT323-6

www.st.com

Summary of content (21 pages)

PAGE 1
TL431 TL432 Programmable voltage reference Datasheet − production data Features ■ 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.
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Contents TL431, TL432 Contents 1 Schematic diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 4 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.1 4 Reference input voltage deviation over temperature range . . . . . . . . . . . . 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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TL431, TL432 1 Schematic diagrams Schematic diagrams Figure 1. TO-92 pin connections (top view) Figure 2. SO-8 batwing pin connections (top view) SO8 Cathode 1 8 Ref Anode 2 7 Anode 3 6 NC 4 Figure 3. 5 NC SOT23-5 and SOT23-3 pin connections (top view) SOT23-5 NC 1 NC 2 Cathode 3 SOT23-3 5 Anode Cathode 1 4 Ref Ref 2 3 Anode TL431 TL431 Figure 4. SOT323-6 pin connections (top view) Figure 5.
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Absolute maximum ratings and operating conditions 2 TL431, TL432 Absolute maximum ratings and operating conditions Table 1. Absolute maximum ratings Symbol VKA Parameter Cathode to anode voltage Value Unit 37 V Ik Continuous cathode current range -100 to +150 mA Iref Reference input current range -0.
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TL431, TL432 Electrical characteristics 3 Electrical characteristics Table 3. TL431C (Tamb = 25° C unless otherwise specified) TL431C Symbol Unit Min.
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Electrical characteristics Table 4. TL431, TL432 TL431I/TL432I (Tamb = 25°C unless otherwise specified) TL431I/TL432I Symbol Unit Min.
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TL431, TL432 Table 5. Electrical characteristics TL431IY (Tamb = 25°C unless otherwise specified) TL431IY Symbol Unit Min.
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Electrical characteristics Figure 7. TL431, TL432 Test circuit for VKA = Vref Figure 8. Test circuit for programming mode Input Input R Output R IK Output R1 IK=10mA VKA IREF R2 VKA VREF VREF VKA = VREF ( 1 + R1 ------- ) + R1 x IREF R2 Figure 9. Test circuit for Ioff Figure 10. Test circuit for phase margin and voltage gain VKA=36V 10μF 10μF Figure 11. Test circuit for response time Output 8.25kΩ Input IK=10mA 15kΩ IOFF VREF Figure 12. Reference voltage vs.
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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. Off-state cathode current vs. temperature 0.4 Off-state current IOFF (μA) Reference current IREF (μA) 2.0 IK=10 mA R1=10kΩ R2= + ∝ 1.5 1.0 0.5 0.0 -40 VKA = 36 V VREF = 0 V 0.3 0.2 0.1 -20 0 20 40 60 80 100 0.
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Electrical characteristics TL431, TL432 Figure 19. Minimum operating current vs. temperature Figure 20. Gain and phase vs. frequency Minimum cathode current IMIN (mA) 0.6 0.4 VKA = VREF 0.2 0.0 -40 -20 0 20 40 60 80 100 120 Temperature (°C) Figure 21. Stability behavior with capacitive loads Figure 22. Maximum power dissipation Figure 23.
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TL431, TL432 4 Package mechanical data Package mechanical data 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: www.st.com. ECOPACK® is an ST trademark.
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Package mechanical data 4.1 TL431, TL432 SO-8 package information Figure 24. SO-8 package mechanical drawing Table 6. SO-8 package mechanical data Dimensions Ref. Millimeters Min. Typ. A Max. Min. Typ. 1.75 0.25 Max. 0.069 A1 0.10 A2 1.25 b 0.28 0.48 0.011 0.019 c 0.17 0.23 0.007 0.010 D 4.80 4.90 5.00 0.189 0.193 0.197 E 5.80 6.00 6.20 0.228 0.236 0.244 E1 3.80 3.90 4.00 0.150 0.154 0.157 e 0.004 0.010 0.049 1.27 0.050 h 0.25 0.50 0.010 0.
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TL431, TL432 4.2 Package mechanical data TO-92 ammopack and tape and reel package information Figure 25. TO-92 ammopack and tape and reel package mechanical drawing Table 7. TO-92 ammopack and tape and reel package mechanical data Millimeters Inches Dim. Min. Typ. Max. Min. Typ. Max. A1 5.0 0.197 A 5.0 0.197 T 4.0 0.157 d 0.45 0.018 I1 2.5 0.098 P 11.7 12.7 13.7 0.461 0.500 0.539 PO 12.4 12.7 13 0.488 0.500 0.512 P2 5.95 6.35 6.75 0.234 0.250 0.266 F1/F2 2.
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Package mechanical data 4.3 TL431, TL432 TO-92 (bulk) package information Figure 26. TO-92 bulk package mechanical drawing 0067407_H Table 8. TO-92 bulk package mechanical data Millimeters Inches Dim. Min. A Typ. Min. 1.35 B Typ. Max. 0.053 4.70 C 14/21 Max. 0.185 2.54 0.100 D 4.40 0.173 E 12.70 0.500 F 3.70 0.146 a 0.5 0.
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TL431, TL432 4.4 Package mechanical data SOT23-3 package information Figure 27. SOT23-3 package mechanical drawing Table 9. SOT23-3 package mechanical data Dimensions Millimeters Inches Ref. Min. Typ. Max. Min. Typ. Max. A 0.89 1.12 0.035 0.044 A1 0.01 0.10 0.0004 0.004 A2 0.88 1.02 0.035 b 0.30 0.50 0.012 0.020 c 0.08 0.20 0.003 0.008 D 2.80 3.04 0.110 E 2.10 2.64 0.083 E1 1.20 1.40 0.047 0.95 2.90 1.30 0.037 0.114 0.051 0.95 0.037 e1 1.90 0.
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Package mechanical data 4.5 TL431, TL432 SOT23-5 package information Figure 28. SOT23-5 package mechanical drawing 7049676_I Table 10. SOT23-5 package mechanical data Dimensions Ref. Millimeters Min. A Typ. 0.90 A1 Max. Min. 1.45 0.035 Typ. Max. 0.057 0.15 0.006 A2 0.90 1.30 0.035 0.051 b 0.35 0.50 0.014 0.020 c 0.09 0.20 0.004 0.008 D 2.80 3.05 0.110 0.120 E 1.50 1.75 0.059 0.069 e 16/21 Inches 0.95 0.037 H 2.60 3.00 0.102 0.118 L 0.10 0.60 0.
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TL431, TL432 4.6 Package mechanical data SOT323-6 package information Figure 29. SOT323-6 package mechanical drawing 7095021_E Table 11. SOT323-6 package mechanical data Dimensions Ref. Millimeters Min. Typ. Inches Max. Min. 0.031 Typ. Max. A 0.80 1.10 A1 0 0.10 A2 0.80 1.00 0.031 0.039 b 0.15 0.30 0.006 0.012 c 0.10 0.18 0.004 0.007 D 1.80 2.20 0.071 0.087 E 1.15 1.35 0.045 0.053 e 0.043 0.004 0.65 0.026 HE 1.80 2.40 0.071 0.094 L 0.10 0.40 0.004 0.
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Ordering information TL431, TL432 5 Ordering information Table 12.
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TL431, TL432 Table 12. Ordering information Order codes (continued) Order code Accuracy (%) TL431IYD (1) TL431IYDT (1) 2 TL431AIYD (1) TL431AIYDT (1) 1 Temperature range Package Packing -40°C to + 125°C SO-8 (Automotive grade level) Tube or tape and reel Marking 431IY 431AIY 1. Qualification and characterization according to AEC Q100 and Q003 or equivalent, advanced screening according to AEC Q001 & Q 002 or equivalent.
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Revision history TL431, TL432 6 Revision history Table 13. Document revision history Date Revision 01-Mar-2002 1 Initial release. 01-Nov-2005 2 PPAP references inserted in order codes table on cover page. 13-Dec-2006 3 Corrected TO-92 package information. 4 Specified that SO-8 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.
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TL431, TL432 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale.