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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 0.5% TO92-3
- Series：-
- Mfr：Texas Instruments
- Package：Bulk,Tape & Box (TB)
- 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：Through Hole
- Package / Case：TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Supplier Device Package：TO-92-3
- Grade：-
- Qualification：-
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Overview
The TL431BCLPM is a three-terminal adjustable shunt regulator from Texas Instruments, housed in an SOT-23 package. It provides a reference voltage range from approximately 2.5 V to 36 V, set via two external resistors. The device features a typical output impedance of 0.2 Ω and supports cathode currents between 1 mA and 100 mA. Initial accuracy is specified at 1% at 25°C, with a temperature coefficient of 92 ppm/°C. Operating temperatures span from -40°C to +85°C.
Feature Summary
- Provides precise programmable shunt regulation for stable voltage references
- Features low output noise and high stability across wide temperature ranges
- Offers flexible output voltage adjustment using simple external resistor networks
Applications
- Board-level voltage regulation circuits
- Adjustable power supply designs
- Switching power supply feedback loops
Procurement Notes
Verify the specific suffix 'LPM' against the official datasheet to confirm the SOT-23 package type and ensure it matches your PCB footprint requirements. Confirm that the 1% initial accuracy meets your circuit tolerance needs. Check for any automotive or military qualification markings if operating in harsh environments. Ensure the maximum input voltage rating of 36 V is not exceeded in your application design.
Selection Notes
Select this component when a compact SOT-23 form factor is required for space-constrained designs. Choose the B-grade variant for 1% initial accuracy instead of the standard C-grade (2%) or A-grade (0.5%). Verify that the -40°C to +85°C commercial temperature range aligns with your system's thermal environment. Consider the 100 mA current capability for load requirements.
Part Context
This part belongs to the TL431 family of programmable precision shunt regulators. These devices are widely used as Zener diode replacements in various power management applications. The TL431 series is known for its reliability and cost-effectiveness in consumer electronics and industrial control systems.
Replacement Considerations
Compatible substitutes include other TL431 variants such as TL431ACLP or TL431BCPWR, provided the package type and accuracy grade match the design requirements. Cross-reference with generic equivalents like KA431, ensuring pinout compatibility and electrical specifications are identical.
