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Product Detailed Parameters
- Description：VOLTAGE REFERENCE
- Series：-
- Mfr：Texas Instruments
- Package：Bulk
- Output Type：Adjustable
- Voltage - Output (Min/Fixed)：2.5V
- Voltage - Output (Max)：36 V
- Current - Output：100 mA
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Through Hole
- Package / Case：TO-226-3, TO-92-3 (TO-226AA)
- Supplier Device Package：TO-92-3
- Grade：-
- Qualification：-
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Overview
The TL1431QLP is a precision programmable shunt voltage reference manufactured by Texas Instruments, housed in a TO-92 (LP) package. It features an adjustable output voltage range from approximately 2.5 V to 36 V, set via two external resistors. The device guarantees a 0.4% initial voltage tolerance and operates within the automotive temperature range of –40°C to +125°C. Key electrical characteristics include a typical dynamic output impedance of 0.2 Ω, a sink current capability ranging from 1 mA to 100 mA, and a fast turn-on time of 500 ns.
Feature Summary
- Precision Adjustable Shunt Reference
- Automotive Temperature Range Characterization
- Fast Turn-On Response
Applications
- Adjustable Voltage and Current Referencing
- Secondary Side Regulation in Flyback SMPSs
- Zener Diode Replacement
- Voltage Monitoring
- Comparator With Integrated Reference
Procurement Notes
Verify that the specific part number suffix 'QLP' corresponds to the LP (TO-92) package variant with automotive grade (-40°C to +125°C) characterization as defined in the official datasheet. Confirm RoHS compliance status and ensure the ordering information matches the manufacturer's current product folder for the TL1431 family.
Selection Notes
Select this component when an automotive-grade shunt regulator with a through-hole TO-92 package is required. Ensure the application demands a cathode current between 1 mA and 100 mA and an output voltage setting up to 36 V. Verify stability requirements against load capacitance using the provided boundary condition charts.
Part Context
The TL1431QLP belongs to the TL1431 series of precision programmable references. This series includes commercial (TL1431C), automotive (TL1431Q), and military (TL1431M) grades. The 'LP' suffix specifically denotes the 3-pin TO-92 plastic transistor outline package, distinguishing it from surface-mount options like SOIC or TSSOP.
Replacement Considerations
Compatible substitutes include other TL1431 variants such as TL1431CDR or TL1431PW, provided the package type and temperature range meet the design requirements. Cross-reference with TL431 devices if pinout compatibility and similar electrical performance are acceptable for the specific application.
