TLV431ALPREG

Overview

The TLV431ALPREG is a low voltage precision adjustable shunt regulator from onsemi, housed in a TO-92-3 package. It features a programmable output voltage range of 1.24 V to 16 V with a guaranteed reference accuracy of ±1.0% at 25 °C and ±2.0% over the industrial temperature range of −40 °C to 85 °C. The device exhibits a sharp low current turn-on characteristic and a low dynamic impedance of 0.25 Ω over an operating current range of 0.1 mA to 20 mA. It serves as a precise reference voltage source and error amplifier.

Feature Summary

• Programmable output voltage range spanning 1.24 V to 16 V
• Guaranteed reference accuracy of ±1.0% at 25 °C and ±2.0% across the industrial temperature range
• Sharp low current turn-on characteristic for efficient regulation
• Low dynamic output impedance ensuring stable performance

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
• Precision references for analog and digital circuits

Procurement Notes

Verify the specific ordering suffix 'REG' corresponds to the Tape & Reel shipping configuration as documented in the official onsemi ordering information table. Confirm that the component meets Pb-Free and Halide-Free requirements. Check for any discontinuation notices regarding this specific package variant before finalizing procurement plans.

Selection Notes

Select the TLV431ALPREG when a TO-92-3 through-hole package is required for low voltage precision regulation. Choose the 'A' series variant if ±1.0% accuracy at 25 °C is sufficient for the application. Ensure the design accommodates the recommended cathode current range of 0.1 mA to 20 mA for optimal dynamic impedance performance.

Part Context

This component belongs to the 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 TLV431 series is designed to replace zener diodes in applications requiring precise reference voltages and stable regulation characteristics.

Replacement Considerations

Public confirmed substitute part numbers include TLV431BLPREG and TLV431CLPREG within the same manufacturer lineup.