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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 2.2% 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：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：TO-243AA
- Supplier Device Package：SOT-89-3
- Grade：-
- Qualification：-
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Overview
The TL431IPK is a three-terminal adjustable precision shunt regulator manufactured by Texas Instruments. It operates within a voltage range of approximately 2.5V to 36V and features an adjustable output capability defined by two external resistors. The device provides a typical output impedance of 0.2Ω and supports sink currents from 1mA to 100mA. It is housed in a SOT-89-3 surface-mount package and is designed for thermal stability across automotive, commercial, and military temperature ranges.
Feature Summary
- Three-terminal adjustable shunt regulator architecture
- Programmable output voltage via external resistors
- Low dynamic output impedance for stable regulation
- Specified thermal stability across wide temperature ranges
Applications
- Board-level voltage regulation
- Adjustable power supply circuits
- Switching regulator feedback loops
- Zener diode replacement applications
Procurement Notes
Verify the specific suffix 'IPK' against the manufacturer's current datasheet to confirm the exact tolerance grade and package variant. Ensure compatibility with the target PCB footprint for the SOT-89-3 package. Confirm RoHS compliance status if required by the end product specifications. Cross-reference ordering information to distinguish between leaded and lead-free versions.
Selection Notes
Select this component when a precise, adjustable reference voltage is required in a compact surface-mount form factor. The SOT-89-3 package offers a balance between thermal performance and board space efficiency. Consider the 0.2Ω output impedance for applications demanding low noise and high stability. Verify that the operating temperature range meets the environmental requirements of the specific deployment scenario.
Part Context
The TL431 series represents a widely used family of programmable precision references. The IPK designation specifically identifies the SOT-89-3 surface-mount package variant within the broader TL431 lineup. This packaging option facilitates automated assembly processes while maintaining the electrical characteristics associated with the standard TL431 adjustable shunt regulator functionality.
Replacement Considerations
Direct pin-compatible replacements include other manufacturers' TL431 variants in SOT-89 packages. Verify equivalent electrical parameters such as reference voltage tolerance and maximum cathode current before substitution.
