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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 2.21% TO92-3
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：Adjustable
- Voltage - Output (Min/Fixed)：2.495V
- Voltage - Output (Max)：36 V
- Current - Output：100 mA
- Operating Temperature：-40°C ~ 105°C (TA)
- Mounting Type：Through Hole
- Package / Case：TO-226-2, TO-92-2 (TO-226AC)
- Supplier Device Package：TO-92-3
- Grade：-
- Qualification：-
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Overview
The TL431IZT is a programmable shunt voltage reference manufactured by STMicroelectronics. It operates within an input voltage range of 2.5V to 36V and provides an adjustable output voltage between 2.495V and 36V using two external resistors. The device supports a cathode current range from 1mA to 100mA with a typical dynamic impedance of 0.22Ω. It features a ±2% initial accuracy at 25°C and a temperature coefficient of 100ppm/°C. The component functions reliably across an industrial temperature range of -40°C to +105°C and is housed in a TO-92-3 package.
Feature Summary
- Adjustable output voltage settable between 2.5V and 36V via external resistor divider
- Guaranteed temperature stability over the entire operating range
- Wide sink current capability ranging from 1mA to 100mA
- Low typical dynamic output impedance for stable regulation
Applications
- Precision voltage references in power supply circuits
- On-line differential analog-to-digital converters
- Programmable Zener diodes
- Switching power supply feedback loops
Procurement Notes
Verify the specific suffix 'IZT' against the manufacturer's official datasheet to confirm the package type, tolerance grade, and temperature range. Ensure the ordering code matches the required automotive or industrial specifications. Confirm availability status as active before finalizing procurement plans.
Selection Notes
Select this component when a standard 2.5V reference is insufficient and higher voltages up to 36V are required. It is suitable for designs needing wide current handling capabilities compared to low-power alternatives. Consider the TO-92-3 package constraints for through-hole mounting requirements in the target application.
Part Context
This part belongs to the TL431 family of adjustable shunt voltage references. These devices serve as industry-standard replacements for fixed Zener diodes, offering superior performance in terms of temperature stability and dynamic impedance. The family includes variants with different accuracies and packages to suit various industrial and consumer electronics applications.
Replacement Considerations
Compatible substitutes include the TL431IDT and TL431AIZT from the same manufacturer. Cross-brand equivalents such as the LM431 or KA431 may be considered if pinout and electrical characteristics align with the design requirements.
