TLV431ASN1T1

Overview

The TLV431ASN1T1 is a low voltage precision adjustable shunt regulator from the TLV431B series, manufactured by onsemi. It features a guaranteed reference accuracy 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. It exhibits a sharp low current turn-on characteristic and maintains a low dynamic impedance of 0.25 Ω (typical) over an operating cathode current range of 0.1 mA to 20 mA. The component is housed in a micro-size SOT-23-3 package.

Feature Summary

• Precision adjustable shunt regulator with high initial accuracy
• Sharp low current turn-on characteristic for efficient regulation
• Low dynamic output impedance across wide operating current range
• Micro miniature surface mount package design

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 suffix 'SN1' corresponds to the SOT-23-3 package configuration required for your PCB layout. Confirm that the 'TLV431B' designation aligns with your precision requirements, as it offers tighter tolerance than the 'A' series. Ensure compliance with RoHS standards if lead-free materials are mandated for your assembly process. Cross-reference the ordering information to confirm availability in tape and reel formats for automated manufacturing.

Selection Notes

Select this component when precise voltage referencing is critical within a compact footprint. The B-series accuracy makes it suitable for applications demanding tight tolerance control without external trimming. Consider the SOT-23-3 package for space-constrained designs requiring surface mount technology. Evaluate the operating current range to ensure compatibility with the load requirements of your specific circuit topology.

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 numerous analog and digital circuits. The family includes variants with different accuracies and packages, such as TO-92 and TSOP-5, allowing designers to choose based on cost, size, and performance needs.

Replacement Considerations

The TLV431A series is a lower-cost alternative with ±1.0% accuracy. Other manufacturers offer pin-compatible shunt regulators, but electrical characteristics may vary. Verify thermal resistance and stability boundaries when substituting with components from different vendors.