TLVH431BIL3T

Overview

The TLVH431BIL3T is an active adjustable shunt voltage reference manufactured by STMicroelectronics. It operates within a temperature range of -40°C to +125°C and complies with RoHS standards in the Ecopack2 package. The device features an output voltage range from 1.24 V to 18 V, set via external resistors. Key electrical parameters include a low operating current of 100 μA at 25 °C, a sink current capability up to 60 mA, and a maximum temperature coefficient of 100 ppm/°C. The component is available in SOT-23-3L packages.

Feature Summary

• Adjustable output voltage programmable between 1.24 V and 18 V using external resistor dividers
• Low power consumption with guaranteed temperature stability across the industrial operating range
• High sink current capability supporting wide dynamic current requirements
• Compact surface-mount packaging suitable for space-constrained designs

Applications

• Isolated feedback circuits in switch-mode power supplies
• Board-level voltage regulation systems
• Replacement for low-voltage Zener diodes in precision applications

Procurement Notes

Verify the specific accuracy grade, as the TLVH431 series includes variants with 0.25%, 0.5%, 1%, and 1.5% tolerances. Confirm the exact package suffix matches the required pinout and thermal characteristics. Ensure the ordering code aligns with the desired packing type, such as tape and reel quantities. Cross-reference the manufacturer's latest datasheet for any updates on compliance or environmental certifications before finalizing procurement.

Selection Notes

Select this component when designing low-voltage circuits requiring a precise reference below standard 2.5 V thresholds. It serves as a direct alternative to traditional TL431 devices where lower operating voltages are necessary. Consider the 100 μA minimum cathode current requirement to ensure stable regulation during light-load conditions. Evaluate the 60 mA sink limit against peak load demands in the target application circuit.

Part Context

This part belongs to the TLVH431 family of low-voltage adjustable shunt regulators. Unlike standard references starting at 2.5 V, this series enables operation down to 1.24 V, facilitating efficient design in modern low-power electronics. The B-grade designation typically indicates tighter initial accuracy compared to other series variants, ensuring higher precision in voltage setting applications without external calibration.

Replacement Considerations

Direct replacements include the TLVH431A-Q1 and TLVH431B-Q1 for automotive-grade requirements. Standard equivalents like the TL431 may require voltage level adjustments due to their higher 2.5 V reference baseline. Verify pin compatibility and thermal performance when substituting with other SOT-23 packaged shunt regulators.