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TS3431CILT
1.24V PROGRAMMABLE SHUNT VOLTAGE REFERENCE
August 2012 Doc ID 10174 Rev 4 1/13
TS34311.24 V programmable shunt voltage reference
Datasheet − production data
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 +125°C Performance compatible with industry
standard TL431
Applications Computers Instrumentation Battery chargers Switch mode power supply Battery operated equipment
DescriptionThe TS3431 is a programmable 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.
Contents TS34312/13 Doc ID 10174 Rev 4
Contents Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
TS3431 Block diagramDoc ID 10174 Rev 4 3/13
1 Block diagram
Figure 1. Block diagram
Absolute maximum ratings TS34314/13 Doc ID 10174 Rev 4
Absolute maximum ratings
Table 1. Absolute maximum ratings (AMR) Pd is calculated with Tamb = 25°C, Tj = 150°C, Rthjc = 110°C/W, Rthja = 340°C/W.
Table 2. Operating conditions
TS3431 Electrical characteristicsDoc ID 10174 Rev 4 5/13
3 Electrical characteristics Table 3. 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
by design.
Electrical characteristics TS34316/13 Doc ID 10174 Rev 4
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 6. Reference input current vs.
temperature
Figure 7. Dynamic impedance vs frequency
TS3431 Electrical characteristicsDoc ID 10174 Rev 4 7/13
Figure 8. Off-state current vs temperature Figure 9. Test circuit for off-state current
measurement
Figure 10. Ratio of change in reference input
voltage to change in VKA voltage
vs. temperature
Figure 11. Test circuit for VK > V REF
Figure 12. Pulse response at IK =1mA Figure 13. Test circuit for pulse response at K =1mA
