TS431.fm

Document overview

  • Manufacturer or author: STMICROELECTRONICS
  • PDF pages: 16

Technical content

Datasheet sections

  • 1 Pinout
  • 2 Absolute maximum ratings and operating conditions
  • 3 Electrical characteristics
  • 4 Application information
  • 5 Package information
  • 5.1 SOT23-5 package information
  • 5.2 TO92 (tape ammopack and tape and reel) package information
  • 5.3 TO92 (bulk) package information
  • 6 Ordering information
  • 7 Revision history

Features

 AEC-Q100 qualified (SOT23-5)  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  Automotive grade version available

Description

The TS431 is a low-voltage, three-terminal, adjustable shunt voltage reference. The output voltage can be set to any value between V 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. L SOT23-5 (plastic micropackage) Z TO92 (plastic package)

1 Pinout

Figure 1. Pinout Z TO92 (plastic package) Figure 2. Pinout L SOT23-5 (plastic micropackage)

2 Absolute maximum ratings and operating conditions

Table 1. Absolute maximum ratings Table 2. Operating conditions

  1. Please refer to Section 4: Application information for more details.

Table 3. Thermal data

3 Electrical characteristics

Figure 3. Output voltage change over temperature range Table 4. Tamb = 25 °C (unless otherwise specified)

  1. Limits are 100% production tested at 25 °C. Behavior at the temperature range limits is guaranteed through correlation and

4 Application information

The TS431 is a general-purpose low-power adjustable 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 4 on page 5. Since the TS431 is designed for general-purpose applications with a broad range of cathode currents, voltages and loads, when designing with the device in applications requiring fast dynamic response (turn-on/off and/or pulsed load conditions) it should be considered that upon application of power, the time required for the V KA voltage to reach its final value within a specified error range depends on several factors, among which the temperature, cathode current and capacitive load inrush current are the most influential. The dynamic response of the device to fast turn-on/off, load and temperature changes is optimized when the cathode current is not in the lower end of the operating range (IK > 500 µA).

5 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.

5.1 SOT23-5 package information

Table 5. SOT23-5 package mechanical data Figure 21. SOT23-5 package outline

5.2 TO92 (tape ammopack and tape and reel) package

Figure 22. TO92 (tape ammopack and tape and reel) package outline Table 6. TO92 (tape ammopack and tape and reel) package mechanical data

5.3 TO92 (bulk) package information

Figure 23. TO92 (bulk) package outline Table 7. TO92 (bulk) package mechanical data

6 Ordering information

Table 8. Order codes

  1. Qualification and characterization acco rding to AEC-Q100 and AEC-Q003 or equivalent, advanced screening according to

AEC-Q001 and AEC-Q002 or equivalent.

7 Revision history

Table 9. Document revision history 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). Resized graphics on cover page. Corrected errors in SOT23-5 package mechanical data. Removed erroneous drawing for TO92 tape & reel package. Updated drawing for TO92 bulk package. 27-Aug-2010 7 Modified note for package SOT23-5 on page 1. 15-Nov-2012 8 Modified note 1 Table 5 on page 12. 17-Dec-2012 9 Added note 1 Table 2 on page 2 and Section 3 on page 7. 12-Mar-2013 10 Added features Automotive grade version available in cover page. Added automotive qualification for SOT23-5 in the whole document. Updated main title on page 1. Added Section 1: Pinout on page 3. Updated Table 1 on page 4 (removed note 1). Minor modifications throughout document. 27-Jun-2018 12 Added precision value in Table 8: Order codes.