TLV431BLPREG

Overview

The TLV431BLPREG is a discontinued precision adjustable shunt regulator from onsemi, belonging to the TLV431B series. It features a reference voltage tolerance of ±0.5% at 25°C and ±1.0% over the industrial temperature range of -40°C to +85°C. The device operates with a programmable output voltage range from 1.24 V to 16 V and supports a cathode current range of 0.1 mA to 20 mA. It exhibits a low dynamic impedance of 0.25 Ω typical and is housed in a TO-92-3 package.

Feature Summary

• Programmable output voltage range spanning 1.24 V to 16 V
• High reference accuracy with ±0.5% tolerance at 25°C
• Low dynamic output impedance for stable regulation
• Sharp low current turn-on characteristic

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 component status as this specific part number is listed as discontinued in official documentation. Confirm availability through authorized distributors or secondary markets. Ensure compatibility with existing designs by checking pinout and electrical specifications against active replacement options. Validate that the TO-92-3 package style matches the intended PCB footprint requirements.

Selection Notes

Select the TLV431B series when higher initial accuracy than the standard A series is required. The B series provides ±0.5% tolerance compared to ±1.0% for the A series. Consider the operating temperature range and required cathode current limits. Verify stability boundaries if load capacitance is present in the application circuit. Evaluate thermal resistance characteristics for the TO-92-3 package under expected power dissipation conditions.

Part Context

This component is part of the broader TLV431 family of low voltage precision adjustable shunt regulators manufactured by onsemi. The family includes variants with different accuracy grades (A, B, C) and packaging options such as TSOP-5 and SOT-23-3. The TLV431B series specifically targets applications requiring tighter voltage reference tolerances within the industrial temperature range.

Replacement Considerations

Official documentation lists TLV431BLPRAG and TLV431BLPG as similar TO-92-3 packages within the same discontinued group. Active alternatives may include NCV431BSNT1G or SCV431BSN1T1G for automotive-grade requirements in surface-mount packages. Verify functional equivalence before substitution.