TLV431BSNT1G

Overview

The TLV431BSNT1G is a low voltage precision adjustable shunt regulator from onsemi, belonging to the TLV431B series. It features a programmable output voltage range of 1.24 V to 16 V with 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 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 is housed in a micro-size SOT-23-3 package (SN1 suffix) and is available in tape and reel shipping formats.

Feature Summary

• Programmable output voltage range spanning 1.24 V to 16 V
• High reference accuracy with ±0.5% tolerance at 25 °C
• 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
• Low voltage zener diode replacements

Procurement Notes

Verify the specific ordering suffix SN1 to confirm the SOT-23-3 package type and tape & reel shipping method. Ensure the B series designation matches the required ±0.5% initial accuracy specification. Confirm that the standard industrial temperature range of −40 °C to 85 °C aligns with the thermal requirements of the target application environment before finalizing procurement.

Selection Notes

Select this component when precise voltage referencing is required within a compact surface-mount footprint. The B series offers tighter initial accuracy compared to the A series, making it suitable for applications demanding higher precision. Consider the SOT-23-3 package dimensions for PCB layout constraints. Verify that the operating current range of 0.1 mA to 20 mA meets the circuit's minimum load and maximum sink current requirements.

Part Context

This device is part of the TLV431 family of low voltage precision adjustable shunt regulators. The family includes A, B, and C series variants differentiated by reference accuracy levels. The TLV431B series specifically provides improved accuracy over the standard A series while maintaining compatibility with the same pinouts and application circuits. It serves as a direct replacement for traditional zener diodes in precision reference applications.

Replacement Considerations

TLV431ASN1T1G

FAQ

What is the minimum cathode current required for regulation?

The minimum cathode current for regulation is typically 30 µA, with a maximum guaranteed value of 80 µA.

How does the TLV431BSNT1G differ from the TLV431ASNT1G?

The primary difference is the reference voltage tolerance; the B series offers ±0.5% accuracy at 25 °C, whereas the A series offers ±1.0% accuracy.