Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsVoltage RegulatorsTS431ILT

This is information on a product in full production.

March 2013 DocID5558 Rev 10 1/14

TS431

Low voltage adjustable shunt reference

Datasheet - production data

Features

 Low voltage operation: 1.24 to 6 V

 2 %, 1 % and 0.5 % voltage precision

 Wide operating range cathode current: 60 µA

to 30 mA

 Low output impedance: 0.2 

 Typically stable for any capacitive loads

 ESD protection:

– Human body model: 2 kV

– Machine model: 200 V

 100 ppm/°C temperature coefficient

 Automotive grade version available

Description

The TS431 is a low-voltage, three-terminal,

programmable shunt voltage reference. The

output voltage can be set to any value between

ref

(1.24 V) and 6 V using two external resistors.

The TS431 is able to operate at a lower voltage

(1.24 V) and lower cathode current than the

widely-used TL431 and TL1431 shunt voltage

reference. When driving an optocoupler, the

TS431 is particularly suitable for regulating 3.3 V

switching power supplies.

SOT23-5

(Plastic micropackage)

TO92

(Plastic package)

www.st.com

Summary of content (14 pages)

PAGE 1
TS431 Low voltage adjustable shunt reference Datasheet - production data Z TO92 (Plastic package) Features  Low voltage operation: 1.24 to 6 V  2 %, 1 % and 0.5 % voltage precision  Wide operating range cathode current: 60 µA to 30 mA  Low output impedance: 0.
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Absolute maximum ratings and operating conditions 1 TS431 Absolute maximum ratings and operating conditions Table 1. Absolute maximum ratings Symbol VKA Parameter Cathode to anode voltage Value Unit 10 V Ik Continuous cathode current range -20 to +40 mA Iref Reference input current range -0.05 to +3 mA Pd Power dissipation(1) TO92 package SOT23-5 package 625 500 mW Tstg Storage temperature range -65 to +150 °C Value Unit 1.
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TS431 2 Electrical characteristics Electrical characteristics Table 3. Tamb = 25°C (unless otherwise specified) Symbol Vref Vref Parameter Test conditions Output voltage VKA = Vref @ Ik = 100A TS431 TS431A TS431B Output voltage change (1) (2) Ik = 100A, VKA = Vref 0 < Tamb < +70°C -40 < Tamb < +85°C -40 < Tamb < +105°C -40 < Tamb < +125°C Min. Typ. Max. Unit 1.215 1.228 1.234 1.240 1.265 1.252 1.
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Electrical characteristics TS431 Figure 2. Reference voltage vs. temperature Figure 3. Test circuit for VKA = Vref 1.252 Reference voltage (V) Input Vka = Vref Ik = 100 µA 1.248 Output Ik 1.244 1.24 Vka 1.236 Vref 1.232 1.228 -40 -20 0 20 40 60 80 100 120 Temperature (°C) Figure 4. Cathode voltage vs. cathode current Figure 5. Cathode voltage vs. cathode current 1.5 15 Ika Cathode current (mA) Vka Cathode voltage (V) Vka = Vref T = 25°C 10 5 0 -5 1 0.
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TS431 Electrical characteristics Figure 8. Off-state current vs. temperature Figure 9. Test circuit for off-state current measurement 200 IOff Off-State current (nA) Input Vka=6V 150 Ioff 100 50 0 -40 -20 0 20 40 60 80 100 120 Temperature (°C) Ratio of change in reference input voltage (mV/V) Figure 10. Ratio of change in reference input voltage to change in VKA voltage vs. temperature 0 Figure 11.
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Electrical characteristics TS431 Figure 14. Pulse response at Ik = 100 µA Figure 15. Test circuit for pulse response at Ik = 100 µA Input voltage 18K 2 Pulse Generator f=100KHz Output voltage Output Ik=100µA Intput input and output voltage (V) 3 50 1 0 0 1 2 3 4 5 6 7 8 9 10 Time (µs) Figure 16. Pulse response at Ik = 1mA Figure 17. Test circuit for pulse response at Ik = 1 mA Input voltage 1.
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TS431 3 Application information Application information The TS431 is a general-purpose low-power programmable shunt voltage reference, capable of operating with a cathode current as low as 60 µA and up to 30 mA. The main static parameters of the TS431 voltage reference are specified in Table 3.
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Package information 4 TS431 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: www.st.com. ECOPACK® is an ST trademark.
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TS431 Package information Table 4. SOT23-5 package mechanical data Dimensions Ref. Millimeters Min. Typ. Inches Max. Min. Typ. Max. A 0.90 1.45 0.035 0.057 A1 0.00 0.15 0.00 0.006 A2 0.90 1.30 0.035 0.051 b 0.35 0.50 0.014 0.02 C 0.09 0.20 0.003 0.008 D 2.80 3.00 0.110 0.118 H 2.60 3.00 0.102 0.118 E 1.50 1.75 0.059 0.069 e 0.95 0.037 e1 1.9 0.075 L 0.35 0.55 0.014 0.022 .
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Package information TS431 Figure 19. TO92 (tape ammopack and tape and reel) package data A1 P T P A H W2 W0 W W1 H0 I1 H L1 H1 d D0 F1 F2 P2 P0 Millimeters Inches Dim. Min. Typ. Min. Typ. Max. AL 5.0 0.197 A 5.0 0.197 T 4.0 0.157 d 0.45 0.018 I1 2.5 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 2.4 2.5 2.8 0.094 0.098 0.110 h -1 0 1 -0.039 0 0.039 P -1 0 1 -0.
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TS431 Package information Figure 20. TO92 (bulk) package mechanical data Millimeters Inches Dim. Min. L Typ. Max. Min. 1.27 Typ. Max. 0.05 B 3.2 3.7 4.2 0.126 0.1457 0.1654 O1 4.45 5.00 5.2 0.1752 0.1969 0.2047 C 4.58 5.03 5.33 0.1803 0.198 0.2098 K 12.7 O2 0.407 0.0197 0.02 a 0.35 0.5 0.5 0.508 0.016 0.
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Ordering information 5 TS431 Ordering information Table 5. Order codes Order codes Temperature range Packages Packing Marking L272 TS431ILT  TS431AILT L271 TS431BILT L270 Tape and reel TS431IYLT (1) TS431AIYLT (1) TS431BIYLT (1) L274 -40°C, + 125°C  (automotive grade level) L273 TS431IZ/IZT/IZ-AP TS431AIZ/AIZT/AIZ-AP L276 TO92 TS431BIZ/BIZT/BIZ-AP Bulk (Z), Tape and reel (ZT) or Ammo pack (AP) TS431I TS431AI TS431BI 1.
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TS431 6 Revision history Revision history Table 6. Document revision history Date Revision Changes 1-Sep-2003 1 Initial release. 1-Oct-2005 2 PPAP references inserted in the datasheet. See the order codes table. Minor changes to formatting and grammar. 2-Jan-2006 3 TS431AIYLT PPAP reference inserted. See the order codes table. 22-Sep-2006 4 Included footnote on automotive grade qualification to order codes table. Updated package information (changed mils to inches).
PAGE 14
TS431 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.