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TS3431-TS3431AIZ-TS3431BILT
1.24 Programmable Shunt Voltage Reference
Adjustable output voltage: 1.24 to 24V Several precision @ 25°C±2%, ±1%, ±0.5% and ±0.25% Sink current capability: 0.4 to 100mA Industrial temperature range: -40 to +125°C Performances compatible with industry
standard TL431
DescriptionThe TS3431 is a programmable shunt voltage
reference with guaranteed temperature stability
over the entire temperature range of operation
(-40 to +125°C). The output voltage may be set to
any value between 1.24V and 24V with an
external resistor bridge.
Available in SOT23-3 surface mount package, it
can be designed in applications where space
saving is a critical issue.
Applications Computers Instrumentation Battery chargers Switch mode power supply Battery operated equipments
Pin Connections (top view)
Order Codes
TS34311.24V Programmable Shunt Voltage Reference
TS3431 Absolute Maximum Ratings Absolute Maximum Ratings
Table1. Key parameters and their absolute maximum ratings Pd has been calculated with Tamb = 25°C and Tj = 150°C and Rthjc = 66°C/W, Rthja = 200°C/W for the TO92 package
Rthjc = 110°C/W, Rthja = 340°C/W for the SOT23-3L package
Table2. Operating Conditions
Electrical Characteristics TS3431 Electrical Characteristics
Table3. Tamb = 25°C (unless otherwise specified)
Note: Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation and by design.
TS3431 Electrical Characteristics
Figure 1. Reference voltage vs. temperature
Figure 2. Cathode voltage vs cathode current
Figure 3. Reference input current vs
temperature
Figure 4. Test circuit for VK = Vref
Figure 5. Minimum operating current vs
temperature
Figure 6. Dynamic impedance vs frequency
Electrical Characteristics TS3431
Figure 7. Off-State current vs temperature
Figure 8. Ratio of change in reference input
voltage to change in Vka voltage vs
temperature
Figure 9. Phase and gain vs frequency
Figure 10. Test circuit for off-state current
measurement
Figure 11. Test circuit for VK > VREF
Figure 12. Test circuit for phase and gain
measurement
TS3431 Electrical Characteristics
Figure 13. Pulse response at Ik=1mA
Figure 14. Pulse response at Ik = 10mA
Figure 15. Block diagram
Figure 16. Test circuit for pulse response at Ik
= 1mA
Figure 17. Test circuit for pulse response at Ik
= 10mA
Figure 18. Equivalent input noise vs
frequency
