TLV431ASNT1

Overview

The TLV431ASNT1 is a low voltage precision adjustable shunt regulator from onsemi, belonging to the TLV431A series. It features a programmable output voltage range of 1.24 V to 16 V and an initial reference accuracy of ±1.0% at 25 °C. The device operates within a cathode current range of 0.1 mA to 20 mA and exhibits a dynamic impedance of 0.25 Ω. It is housed in a micro-size SOT-23-3 package (SN1 suffix) with three pins: Reference, Anode, and Cathode. The operating ambient temperature range spans from -40 °C to +85 °C.

Feature Summary

• Precision adjustable shunt regulation with wide programmable voltage range
• Sharp low current turn-on characteristic for efficient operation
• Low dynamic output impedance ensuring stable performance
• Micro miniature surface mount packaging for space-constrained designs

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 that the ordering suffix SN1 corresponds to the SOT-23-3 package type required for your PCB layout. Confirm the 'A' series designation matches the ±1.0% accuracy specification needed for your circuit tolerance requirements. Ensure the component meets the specific thermal and electrical constraints of your target operating environment before finalizing procurement.

Selection Notes

Select this component when a precise, low-voltage reference is required in a compact form factor. The TLV431A series offers sufficient accuracy for general-purpose analog and digital circuits. Consider the SOT-23-3 package if board space is limited compared to larger TO-92 or TSOP-5 options. Verify that the operating current range aligns with the load requirements of your specific application design.

Part Context

This part belongs to the TLV431 family of low voltage precision adjustable shunt regulators manufactured by onsemi. The family includes variants like the TLV431B which offers tighter accuracy tolerances. These devices are designed as direct replacements for traditional Zener diodes, providing superior stability and programmability for modern power management and signal conditioning applications.

Replacement Considerations

TLV431BSNT1

FAQ

What is the minimum cathode current required for regulation?

The minimum cathode current for regulation is typically 55 µA, though it can reach up to 80 µA depending on conditions.

How does the TLV431ASNT1 differ from the TLV431BSNT1?

The primary difference is the reference accuracy; the TLV431A series has a guaranteed accuracy of ±1.0%, while the TLV431B series offers higher precision at ±0.5%.