Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsVoltage RegulatorsTS3431BILT

This is information on a product in full production.

November 2012 Doc ID 7961 Rev 4 1/11

TS2431

Programmable shunt voltage reference

Datasheet − production data

Features

■ Adjustable output voltage: 2.5 to 24 V

■ Precision selection at 25 °C: ± 2%, ± 1% and

±0.5%

■ Sink current capability: 1 to 100 mA

■ Industrial temperature range: - 40 to +105 °C

■ Performances compatible with industry-

standard TL431

Applications

■ Computers

■ Instrumentation

■ Battery chargers

■ Switch mode power supplies

■ Battery-operated equipment

Description

The TS2431 is a programmable shunt voltage

reference with guaranteed temperature stability

over the entire temperature range of operation

- 40 to + 105 °C. The output voltage may be set to

any value between 2.5 and 24 V with an external

resistor bridge. Available in a SOT23-3L surface

mount package, the device can be implemented

in applications where space-saving is of utmost

importance.

SOT23-3L

(plastic micropackage)

Pin connections (top view)

Cathode

Reference

Anode

TS2431

Table 1. Device summary

Order codes Temperature range Package Packing Precision Marking

TS2431ILT

-40 to +105°C SOT23-3L Tape and reel

2% L285

TS2431AILT 1% L286

TS2431BILT 0.5% L287

www.st.com

Summary of content (11 pages)

PAGE 1
TS2431 Programmable shunt voltage reference Datasheet − production data Features ■ Adjustable output voltage: 2.5 to 24 V ■ Precision selection at 25 °C: ± 2%, ± 1% and ± 0.
PAGE 2
Contents TS2431 Contents 1 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 3 2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.1 4 2/11 SOT23-3L package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 3
TS2431 1 Absolute maximum ratings and operating conditions Absolute maximum ratings and operating conditions Table 2. Absolute maximum ratings Symbol Vka IK IREF Parameter Value Unit 25 V Reverse breakdown current -100 to +150 mA Reference input current range -0.
PAGE 4
Electrical characteristics TS2431 2 Electrical characteristics Table 4. Electrical characteristics (Tamb = 25 °C unless otherwise specified) Symbol Parameter Test condition Min. VK = VREF, IK = 10 mA VREF |ΔVREF| TC Reference input voltage Temperature coefficient Max. 2.45 2.55 TS2431A (1%) 2.475 2.525 TS2431B (0.5%) 2.488 2.512 TS2431B (1%), IK=1mA 2.475 2.525 10 20 17 30 20 35 -40 °C < T < +105 °C 50 100 T = 25 °C 0.3 0.
PAGE 5
TS2431 Electrical characteristics Figure 1. Reference voltage vs. temperature Figure 2. Cathode voltage vs. cathode current 3 Vka Cathode voltage (V) Voltage reference (V) 2.52 Ik =10 mA Vka = Vref 2.51 2.50 2.49 2.48 2 Vka = Vref T=25°C 1 0 -1 -40 -20 0 20 40 60 80 100 -0.10 -0.05 Temperature (°C) Figure 3. 0.00 0.05 0.10 Ika Cathode current (A) Reference input current vs. temperature Figure 4. Test circuit for Vka = Vref Reference input current (µA) 1.
PAGE 6
Electrical characteristics Figure 7. TS2431 Off-state current vs. temperature Figure 8. 0.4 ΔVref / ΔVka (mV/V) 0.3 Off-state current (µA) Ratio of change in reference input voltage to change in Vka voltage vs. temperature 0.2 0.1 0.3 ΔVka=24 to 2.5V Ik=10mA T=25°C 0.2 0.1 0.0 -40 -20 0 20 40 60 80 0.0 -40 100 Temperature (°C) Figure 9. -20 0 20 40 60 80 100 Temperature (°C) Phase and gain vs. frequency Figure 10.
PAGE 7
TS2431 Electrical characteristics Figure 13. Pulse response at Ik = 0 to 1 mA Figure 14. Pulse response at Ik = 1 to 0 mA 6 6 Input voltage 4 Voltage (V) Voltage (V) Input voltage Output voltage 2 4 Ik= 1mA to 0 T=25°C 2 Output voltage Ik= 0 to 1mA T=25°C 0 0.0 0.5 1.0 1.5 0 0.0 2.0 0.5 Time (µs) 1.0 1.5 2.0 Time (µs) Figure 15. Stability boundary conditions Figure 16. Test circuit for pulse response at Ik = 1 mA 80 Stable area 2.
PAGE 8
Package mechanical data 3 TS2431 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.
PAGE 9
TS2431 3.1 Package mechanical data SOT23-3L package information Figure 19. SOT23-3L package mechanical drawing Table 5. SOT23-3L 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 0.075 0.
PAGE 10
Revision history 4 TS2431 Revision history Table 6. 10/11 Document revision history Date Revision Changes 01-Feb-2002 1 Initial release. 10-Sep-2009 2 Updated document format. Modified footnote 1 under Table 2: Absolute maximum ratings on page 3. Added HBM and MM notes under Table 2. 11-May-2012 3 Removed: automotive grade order codes Table 1 on page 1. 22-Nov-2012 4 Added min. and max. values test condition TS2431B (1%), IK = 1 mA Table 4 on page 4.
PAGE 11
TS2431 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.