TL431CLPRM

Overview

The onsemi TL431CLPRM is a three-terminal programmable shunt regulator diode designed as a precision voltage reference. It operates with an input voltage range up to 36 V and supports a sink current capability from 1.0 mA to 100 mA. The device features a typical dynamic output impedance of 0.22 Ω and a temperature coefficient of 50 ppm/°C. Packaged in the SOT-23 surface-mount format, it provides stable regulation for power supply feedback loops and general-purpose reference applications.

Feature Summary

• Programmable output voltage adjustable via external resistors
• Low dynamic output impedance for stable regulation
• Temperature compensated operation across full rated range

Applications

• Power supply feedback control loops
• Precision voltage references
• Op amp circuitry biasing

Procurement Notes

Verify the specific suffix CLPRM against the official datasheet to confirm package type and tape/reel specifications. Ensure the component meets AEC-Q100 requirements if automotive qualification is necessary. Confirm RoHS compliance status for environmental regulations.

Selection Notes

Select this component when a low-cost, high-precision shunt regulator is required for linear regulation or reference generation. Consider the thermal performance and maximum sink current limits relative to the application's load requirements.

Part Context

This part belongs to the TL431 family of programmable zener diodes. It serves as a direct replacement for standard Zener diodes in many analog circuits, offering superior accuracy and lower temperature drift compared to discrete Zener solutions.

Replacement Considerations

Compatible substitutes include the TL431A and TL431B variants from various manufacturers, provided pinouts and electrical tolerances match the design requirements.