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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 0.4% TO92-3
- Series：-
- Mfr：STMicroelectronics
- Package：Cut Tape (CT),Tape & Box (TB)
- Output Type：Adjustable
- Voltage - Output (Min/Fixed)：2.5V
- Voltage - Output (Max)：36 V
- Current - Output：100 mA
- Operating Temperature：-20°C ~ 70°C (TA)
- Mounting Type：Through Hole
- Package / Case：TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Supplier Device Package：TO-92-3
- Grade：-
- Qualification：-
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Overview
The TL1431CZ-AP is an adjustable shunt voltage reference manufactured by STMicroelectronics, housed in a TO-92-3 through-hole package. It provides an output voltage range from 2.5 V to 36 V, set via two external resistors. The device features an initial accuracy of 0.4% and a temperature coefficient of 90 ppm/°C. It operates with a cathode current range of 1 mA to 100 mA and supports a maximum series input voltage of 37 V. The component functions within a temperature range of -20°C to +70°C.
Feature Summary
- Adjustable output voltage capability spanning from 2.5 V up to 36 V using external resistor networks.
- High precision performance characterized by 0.4% initial accuracy and stable temperature coefficients.
- Wide operational current range allowing sink currents from 1 mA to 100 mA for flexible circuit design.
Applications
- Precision voltage regulation in power supply circuits
- Reference voltage sources for analog-to-digital converters
- Feedback control loops in switching regulators
Procurement Notes
Verify the specific suffix AP against the manufacturer's latest datasheet to confirm pinout compatibility and tolerance grades. Ensure the TO-92-3 package matches your PCB footprint requirements. Check RoHS compliance status if environmental regulations apply to your assembly process. Confirm operating temperature limits align with your system's thermal environment before finalizing procurement.
Selection Notes
Select this component when high precision is required over a wide voltage range. The 0.4% accuracy makes it suitable for applications demanding tight voltage tolerances. Consider the TO-92-3 package for prototyping or low-volume production where surface mount space is not critical. Evaluate the 90 ppm/°C temperature coefficient against your system's thermal stability needs.
Part Context
This part belongs to the TL1431 family of adjustable shunt voltage references. It serves as a cost-effective alternative to fixed voltage references, offering programmability. The device is widely used in industrial and consumer electronics for its reliability and ease of integration into standard linear and switching power topologies.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided documentation. Verify cross-references with manufacturers like Texas Instruments or Diodes Incorporated only after confirming electrical parameter equivalence and pinout compatibility.
FAQ
What is the minimum cathode current required for proper operation?
The TL1431CZ-AP requires a minimum cathode current of 1 mA to maintain regulation and ensure stable reference voltage output.
How is the output voltage determined?
The output voltage is adjustable between 2.5 V and 36 V and is set by connecting two external resistors in a voltage divider configuration between the output and reference pins.
