Datasheet - TS3431 - 1.24 V adjustable shunt voltage reference
Document overview
- Manufacturer or author: STMICROELECTRONICS
- PDF pages: 18
Technical content
Datasheet sections
- 1 Diagram
- 2 Maximum ratings
- 3 Electrical characteristics
- 3.1 Performance characteristics
- 4 Package information
- 4.1 SOT23-3L package information
- 5 Device summary
Features
- Adjustable output voltage: 1.24 to 24 V
- Several precision levels @ 25 °C ± 2%, ± 1%, ± 0.5% and ± 0.25%
- Sink current capability: 0.4 to 100 mA
- Industrial temperature range: - 40 °C to + 105 °C
- Performance compatible with industry standard TL431
Applications
- Computers
- Instrumentation
- Battery chargers
- Switch mode power supply
- Battery operated equipment
Description
The TS3431 is an adjustable shunt voltage reference with guaranteed temperature stability over the entire operating temperature range (- 40 °C to + 125 °C). The output voltage can be set to any value between 1.24 V and 24 V with an external resistor bridge. Available in SOT23-3 surface mount package, it can be used in application designs where space saving is critical.Maturity status link TS3431
1.24 V adjustable shunt voltage reference
For further information contact your local STMicroelectronics sales office.
1 Diagram
Figure 1. Block diagram
2 Maximum ratings
Table 1. Absolute maximum ratings
- P d is calculated with Tamb = 25 °C, Tj = 150 °C, Rthjc = 110 °C/W, Rthja = 340 °C/W
Table 2. Operating conditions
3 Electrical characteristics
Limits are 100% production tested at 25 °C. Behavior at the temperature range limits is guaranteed through correlation and by design. Tamb = 25 °C (unless otherwise specified). Table 3. Electrical characteristics
Electrical characteristics
3.1 Performance characteristics
Figure 2. Reference voltage vs. temperature Figure 3. Test circuit for VK = Vref Figure 4. Cathode voltage vs. cathode current Figure 5. Minimum operating current vs. temperature
Figure 10. Ratio of change in reference input voltage to Figure 11. Test circuit for VK > VREF Figure 12. Pulse response at IK = 1 mA Figure 13. Test circuit for pulse response at IK = 10 mA
2.7 K Ω
Figure 14. Pulse response at IK = 10 mA Figure 15. Test circuit for pulse response at IK = 10 mA
Figure 16. Phase and gain vs. frequency Figure 17. Equivalent input noise vs. frequency Figure 18. Test circuit for phase and gain measurement
4.3 K Ω Ω
6.8 K Ω Ω
4 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. TS3431
Package information
4.1 SOT23-3L package information
Figure 19. SOT23-3L package outline
Table 4. SOT23-3L package mechanical data
- These dimensions apply to the flat section of the lead between 0.08 mm and 0.15 mm from the lead tip.
- The max. value of "c" (terminal thickness) increases to 0.19 mm when Cu base leads are electroplated with Sn or SnPb.
- Dimension D does not include mold flash, protrusions or gate burrs. Mold flash, protrusions or gate burrs shall not exceed
- All dimensions comply with JEDEC T0-236-AB unless otherwise marked with designator " * ".
Y14.5M-1994. All dimensions are in millimeters. All angles are in degrees.
Figure 20. SOT23-3L recommended footprint
5 Device summary
Table 5. Order code
Revision history
Table 6. Document revision history 1-Jan-2004 1 Initial release. – CI version added in Table 5: Order code. – Rthjc information added in Table 1: Absolute maximum ratings (AMR). – Test condition added in electrical characteristics Table 3. Removed TO-92 package information and associated order codes. Re-ordered electrical characteristics figures. 30-Aug-2012 4 Added: Vka = Vref parameter in Table 3 on page 5. Updated the title and Section 4.1: SOT23-3L package information. voltage vs. temperature and Figure 11. Test circuit for VK > VREF. 29-May-2019 7 Updated: IREF values in Section 3 Electrical characteristics.