Datasheet TS431 (STMicroelectronics) - 9

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TS431 Application information 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 VKA 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). DocID5558 Rev 12 9/16 16 Document Outline 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 Table 3. Thermal data 3 Electrical characteristics Table 4. Tamb = 25 °C (unless otherwise specified) Definition of output voltage change over temperature range Figure 3. Output voltage change over temperature range Figure 4. Reference voltage vs. temperature Figure 5. Test circuit for VKA = Vref Figure 6. Cathode voltage vs. cathode current Figure 7. Cathode voltage vs. cathode current Figure 8. Reference input current vs. temperature Figure 9. Static impedance vs. temperature Figure 10. Off-state current vs. temperature Figure 11. Test circuit for off-state current measurement Figure 12. Ratio of change in reference input voltage to change in VKA voltage vs. temperature Figure 13. Test circuit for VKA > Vref Figure 14. Phase and gain vs. frequency Figure 15. Test circuit for phase and gain measurement Figure 16. Pulse response at Ik = 100 µA Figure 17. Test circuit for pulse response at Ik = 100 µA Figure 18. Pulse response at Ik = 1 mA Figure 19. Test circuit for pulse response at Ik = 1 mA Figure 20. Equivalent input noise vs. frequency 4 Application information 5 Package information 5.1 SOT23-5 package information Figure 21. SOT23-5 package outline Table 5. SOT23-5 package mechanical data 5.2 TO92 (tape ammopack and tape and reel) package information 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 7 Revision history Table 9. Document revision history