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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 TL431ACPK is an adjustable shunt voltage reference integrated circuit manufactured by Texas Instruments. It operates within a cathode voltage range of 2.495V to 36V and supports a maximum output current of 100mA. The device features an initial accuracy of ±1% and a maximum temperature coefficient of 92ppm/°C. Designed for surface-mount applications, it utilizes the SOT-89-3 package (TO-243AA). The component functions as a precision programmable reference with a typical operating temperature range of 0°C to 70°C.
Feature Summary
- Provides precise adjustable voltage referencing via a three-terminal shunt regulator topology.
- Delivers high initial accuracy suitable for demanding power management circuits.
- Operates reliably across standard industrial temperature ranges.
Applications
- Precision voltage regulation in switching power supplies
- Programmable linear regulators
- Battery charging control circuits
Procurement Notes
Verify the specific suffix 'CPK' corresponds to the SOT-89-3 package configuration during procurement. Confirm RoHS compliance status and moisture sensitivity level requirements against the target assembly process. Ensure the ordering part number matches the exact tolerance and temperature grade specifications required for the design.
Selection Notes
Select this component when a compact surface-mount solution is required for adjustable voltage references. 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 and 100mA current capability against the specific load requirements of the application circuit.
Part Context
This device belongs to the TL431 family of adjustable shunt regulators from Texas Instruments. These components are widely utilized as voltage references and error amplifiers in various power conversion topologies. The TL431 series provides a cost-effective alternative to Zener diodes with superior stability and adjustability.
Replacement Considerations
Direct substitutes include other TL431 variants in the SOT-89-3 package with matching electrical characteristics. Verify pinout compatibility and thermal resistance parameters before substitution.
