TLV431BSNT1

Overview

The onsemi TLV431BSNT1 is a low-voltage adjustable precision shunt regulator in the TLV431B series. It features a reference voltage tolerance of ±0.5% at 25°C and ±1.0% over the -40°C to 85°C temperature range. The device operates with a programmable output voltage from 1.24 V to 16 V, utilizing two external resistors. It exhibits a sharp low-current turn-on characteristic and a dynamic impedance of 0.25 Ω within an operating current range of 0.1 mA to 20 mA. The component is housed in a micro-size TSOP-5 package.

Feature Summary

• Programmable output voltage range spanning 1.24 V to 16 V
• High initial accuracy with ±0.5% reference voltage 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
• Precision references for analog and digital circuits

Procurement Notes

Verify the specific ordering suffix 'SN1' against the datasheet to confirm the TSOP-5 package variant. Ensure the B-series designation matches the required ±0.5% accuracy specification. Confirm that the Pb-free status aligns with project requirements. Cross-reference the manufacturer part number with distributor listings to validate authenticity and sourcing channels before procurement.

Selection Notes

Select this component when precise low-voltage referencing is required in compact designs. The TLV431B series offers superior accuracy compared to standard Zener diodes. Consider the TSOP-5 package for space-constrained surface-mount applications. Evaluate stability boundaries regarding load capacitance and equivalent series resistance during circuit design to ensure reliable operation across the specified temperature range.

Part Context

This device belongs to the TLV431 family of low-voltage adjustable precision shunt regulators manufactured by onsemi. The family includes variants like the TLV431A with lower accuracy specifications. These components are designed as direct replacements for Zener diodes in numerous applications requiring precise reference voltages. The TLV431 series utilizes a three-terminal architecture comprising Reference, Cathode, and Anode pins.

Replacement Considerations

TLV431ASNT1 (A-Series variant)

FAQ

What is the minimum cathode current required for regulation?

The minimum cathode current for regulation is typically 55 µA.

How does the TLV431BSNT1 replace Zener diodes?

It provides a precise, adjustable reference voltage with lower dynamic impedance and better thermal stability than standard Zener diodes.