TS431 STMicroelectronics, TS431 Datasheet

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TS431

Manufacturer Part Number
TS431
Description
Low voltage adjustable shunt reference
Manufacturer
STMicroelectronics
Datasheet

Specifications of TS431

Low Voltage Operation
1.24 to 6 V
Wide Operating Range Cathode Current
60 μA to 30 mA
Low Output Impedance
0.2 Ω
Human Body Model
2 kV
Machine Model
200 V

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Features
Description
The TS431 is a low-voltage, three-terminal,
programmable shunt voltage reference. The
output voltage can be set to any value between
V
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 useful for regulating 3.3 V
switching power supplies.
August 2010
ref
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 Ω
Typically stable for any capacitive loads
ESD protection:
– Human body model: 2 kV
– Machine model: 200 V
100 ppm/°C temperature coefficient
(1.24 V) and 6 V with two external resistors.
Low voltage adjustable shunt reference
Doc ID 5558 Rev 7
(Plastic micropackage)
(Plastic package)
SOT23-5
TO92
L
Z
TS431
www.st.com
1/13
13

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TS431 Summary of contents

Page 1

... V (1.24 V) and 6 V with two external resistors. ref 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 useful for regulating 3.3 V switching power supplies ...

Page 2

... Operating conditions Symbol V Cathode to anode voltage KA I Cathode current k T Operating free air temperature range oper 2/13 Parameter ( °C with amb Parameter Doc ID 5558 Rev 7 TS431 Value Unit 10 V -20 to +40 mA -0. 625 500 -65 to +150 °C Value Unit 1. ...

Page 3

... V ref ref max Figure 1. Output voltage change over temperature range Vref m ax. Vref Test conditions TS431 TS431A TS431B 0 < T < +70°C amb (1) (2) -40 < T < +85°C amb -40 < T < +105°C amb -40 < T < +125°C ...

Page 4

... Test circuit for ref Ik Vref Cathode voltage vs. cathode current 1 +125°C +85°C +25°C -40° Ika Cathode current (µA) Static impedance vs. temperature Vka = Vref Ik = 100µA to 15mA -40 - Temperature (°C) TS431 Output Vka 50 60 100 120 ...

Page 5

... TS431 Figure 8. Off-state current vs. temperature 200 150 100 50 0 -40 - Temperature (°C) Figure 10. Ratio of change in reference input voltage to change in V vs. temperature -40 - Temperature (°C) Figure 12. Phase and gain vs. frequency 60 Phase Gain 10 0 1E+3 1E+4 1E+5 Frequency (Hz) Figure 9. Input ...

Page 6

... Figure 15. Test circuit for pulse response at k Pulse Generator f=100KHz 1mA Figure 17. Test circuit for pulse response at k Pulse Generator f=100KHz 100 1000 Doc ID 5558 Rev 100 µA k 18KΩ Ik=100µA 50Ω 1.8KΩ Ik=1mA 50Ω TS431 ...

Page 7

... TS431 3 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 trademark. Doc ID 5558 Rev 7 Package information ® ...

Page 8

... SOT23-5 package mechanical data Ref 8/13 Dimensions Millimeters Min. Typ. Max. 0.90 1.45 0.00 0.15 0.90 1.30 0.35 0.50 0.09 0.20 2.80 3.00 2.60 3.00 1.50 1.75 0.95 1.9 0.35 0.55 . Doc ID 5558 Rev 7 TS431 Inches Min. Typ. Max. 0.035 0.057 0.00 0.006 0.035 0.051 0.014 0.02 0.003 0.008 0.110 0.118 0.102 0.118 0.059 0.069 0.037 0.075 0.014 0.022 ...

Page 9

... TS431 Figure 19. TO92 (tape ammopack and tape and reel) package data Dim F1/F2 Δh Δ Millimeters Min. Typ. Max. 5.0 5.0 4.0 0.45 2.5 11.7 12.7 13.7 12.4 12.7 13 5.95 6.35 6.75 2.4 2.5 2 17.5 18.0 19.0 5.7 6 6.3 8.5 9 9.75 0.5 20 15.5 16 16.5 25 3.8 4.0 4.2 11 Doc ID 5558 Rev 7 Package information ...

Page 10

... Package information Figure 20. TO92 (bulk) package mechanical data Dim 10/13 Millimeters Min. Typ. Max. 1.27 3.2 3.7 4.2 4.45 5.00 5.2 4.58 5.03 5.33 12.7 0.407 0.5 0.508 0.35 Doc ID 5558 Rev 7 Inches Min. Typ. Max. 0.05 0.126 0.1457 0.1654 0.1752 0.1969 0.2047 0.1803 0.198 0.2098 0.5 0.016 0.0197 0.02 0.0138 TS431 ...

Page 11

... TS431IYLT (1) TS431AIYLT -40°C, + 125°C (1) TS431BIYLT TS431IZ/IZT/IZ-AP TS431AIZ/AIZT/AIZ-AP TS431BIZ/BIZT/BIZ-AP 1. Qualification and characterization according to AEC Q100 and Q003 or equivalent, advanced screening according to AEC Q001 & Q 002 or equivalent are on-going. Packages SOT23-5 SOT23-5 (automotive grade level) TO92 Tape and reel (ZT) or Doc ID 5558 Rev 7 ...

Page 12

... PPAP references inserted in the datasheet. See the order codes table. 1-Oct-2005 2 Minor changes to formatting and grammar. 2-Jan-2006 3 TS431AIYLT PPAP reference inserted. See the order codes table. Included footnote on automotive grade qualification to order codes table. 22-Sep-2006 4 Updated package information (changed mils to inches). Resized graphics on cover page. ...

Page 13

... TS431 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. ...

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