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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 0.25% TO92-3
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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-226-2, TO-92-2 (TO-226AC)
- Supplier Device Package：TO-92-3
- Grade：-
- Qualification：-
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Overview
The TL1431ACZT is an adjustable shunt voltage reference from STMicroelectronics, designed to provide stable voltage regulation across a wide operating range. It allows output voltage setting between 2.5 V and 36 V using two external resistors. The device operates with a cathode current ranging from 1 mA to 100 mA and features a typical dynamic impedance of 0.2 Ω. It offers initial accuracy options including 0.28% and 0.4%, with a temperature coefficient of 90 ppm/°C. The component is housed in an SOIC-8 surface-mount package and supports industrial temperature ranges.
Feature Summary
- Adjustable output voltage capability set by external resistors
- Wide cathode current operating range for flexible load handling
- High precision with low initial accuracy tolerance
- Low dynamic impedance for stable performance
Applications
- Precision power supply regulation
- Programmable linear regulators
- Voltage monitoring circuits
Procurement Notes
Verify the specific suffix 'AC' indicates the required accuracy grade (typically 0.28%) and thermal rating. Confirm the 'ZT' suffix corresponds to the tape-and-reel packaging format suitable for automated assembly. Ensure the selected variant matches the required operating temperature range for the target application environment.
Selection Notes
Select this component when a high-precision, adjustable shunt reference is needed in a compact surface-mount package. Compare against standard TO-92 versions if leaded mounting is preferred or if lower cost is prioritized over PCB space. Consider the 0.28% accuracy grade for applications requiring tighter voltage stability than the standard 0.4% variants offer.
Part Context
This part belongs to the TL1431 family of programmable shunt voltage references. It serves as a direct replacement for legacy Zener diodes in many regulation roles, offering superior temperature stability and lower dynamic impedance. The family includes various packages like TO-92 and SOT-23, with the TL1431ACZT specifically providing the SOIC-8 form factor for modern surface-mount designs.
Replacement Considerations
Direct substitutes include the TL1431ACDT (same series, different reel packaging) and the TL1431ACZ (through-hole equivalent). Verify pinout compatibility when replacing through-hole parts with this surface-mount version.
