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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 1% SOT89-3
- Series：-
- Mfr：Texas Instruments
- 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：0°C ~ 70°C (TA)
- Mounting Type：Surface Mount
- Package / Case：TO-243AA
- Supplier Device Package：SOT-89-3
- Grade：-
- Qualification：-
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Overview
The TL431ACPKG3 is an adjustable precision shunt regulator manufactured by Texas Instruments, housed in a surface-mount SOT-89-3 package. It operates with a reference voltage of 2.495V and supports an output voltage range from 2.495V to 36V. The device features an initial accuracy tolerance of ±1% and can handle a maximum cathode current of 100mA. It functions within a temperature range of -40°C to 85°C and complies with RoHS3 standards.
Feature Summary
- Provides precise adjustable voltage regulation via a three-terminal shunt architecture
- Delivers high accuracy with a specified initial tolerance of ±1%
- Supports wide input voltage operation up to 36V for flexible circuit integration
Applications
- Precision voltage references in power supply circuits
- Output voltage regulation in DC/DC converters
- Comparator applications requiring stable threshold levels
Procurement Notes
Verify the specific suffix 'PKG3' to confirm the SOT-89-3 package type and lead-free composition. Confirm that the component meets RoHS3 requirements for your assembly process. Check manufacturer documentation for moisture sensitivity level (MSL) handling instructions prior to soldering. Ensure the ordering part number matches the required accuracy grade and thermal specifications.
Selection Notes
Select this component when a compact surface-mount solution is required for adjustable shunt regulation. The SOT-89-3 package offers a balance between thermal performance and board space efficiency compared to larger through-hole options. Consider the ±1% accuracy specification against circuit requirements for reference stability. Evaluate the 100mA current capability against the load demands of the application.
Part Context
This device belongs to the TL431 family of programmable shunt regulators widely used in power management. The TL431 series serves as a versatile alternative to Zener diodes, offering superior accuracy and temperature stability. The PKG3 variant specifically denotes the plastic SOT-89 surface-mount package configuration.
Replacement Considerations
Publicly confirmed substitute part numbers include TL431AIPKG3 and TL431BCPKG3. Verify pinout compatibility and electrical parameter alignment before substitution.
