TLV431BLPRA

Overview

The TLV431BLPRA is a precision adjustable shunt regulator from the TLV431B series by onsemi, housed in a TO-92-3 package. It features a reference voltage tolerance of ±0.5% at 25°C and ±1.0% over the -40°C to 85°C range. The device operates with a cathode current range of 0.1 mA to 20 mA and offers a dynamic impedance of 0.25 Ω maximum. Output voltage is programmable from 1.24 V to 16 V using external resistors.

Feature Summary

• Precision voltage reference with tight initial accuracy tolerances across temperature ranges
• Sharp low-current turn-on characteristic for efficient regulation
• Low dynamic output impedance ensuring stable performance under varying loads
• Wide operating current range supporting diverse circuit requirements

Applications

• Error amplifier for isolated low output voltage switching power supplies
• Adjustable voltage or current linear and switching power supplies
• Voltage monitoring circuits
• Current source and sink applications
• Low voltage zener diode replacements

Procurement Notes

Verify the specific ordering suffix 'RA' corresponds to tape and reel shipping configuration when sourcing. Confirm that the component meets RoHS compliance standards if required by your manufacturing process. Ensure the TO-92-3 package dimensions align with your PCB footprint constraints. Check for any recent product discontinuance notifications or lifecycle status updates directly from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when high precision is required for shunt regulation applications. The TLV431B series offers superior accuracy compared to standard Zener diodes. Consider the thermal resistance characteristics of the TO-92-3 package for heat dissipation needs. Evaluate the stability boundaries regarding load capacitance and resistor ratios to ensure loop stability in feedback configurations.

Part Context

This part belongs to the TLV431 family of low-voltage precision adjustable shunt regulators. It serves as a direct replacement for traditional Zener diodes in circuits demanding precise reference voltages. The device integrates an internal bandgap reference and error amplifier within a compact three-terminal structure, facilitating easy integration into various analog and digital control loops.

Replacement Considerations

TLV431BLPRAG is a lead-free variant of the same electrical specification. TLV431BLPRE offers alternative packaging options within the same series. Cross-reference with TLV431A series parts only if relaxed accuracy specifications are acceptable.