H431LT

Overview

The H431LT is an adjustable precision shunt regulator manufactured by HY Electronic (Cayman) Limited, housed in a SOT-23 package. It features a programmable output voltage up to 40V and a guaranteed reference voltage tolerance of ±0.5%. The device operates within a cathode current range of -100 mA to 150 mA and maintains a low dynamic output impedance of 0.2Ω typical. It supports an operating temperature range from -60°C to +125°C with a full-range temperature coefficient of 50 ppm/°C.

Feature Summary

• Programmable output voltage capability extending up to 40V via external resistors
• Guaranteed 0.5% reference voltage tolerance for high precision regulation
• Fast turn-on response suitable for switching applications
• Temperature compensated operation across the full rated temperature range

Applications

• Switching Mode Power Supply
• Voltage Monitoring
• Adjustable Voltage and Current Referencing

Procurement Notes

Verify the specific manufacturer designation as HY Electronic (Cayman) Limited against the datasheet revision Rev. 2 dated 8-Sep-2021. Confirm the SOT-23 package dimensions and RoHS compliance status prior to integration. Ensure that the thermal dissipation characteristics align with the specified junction-to-ambient thermal resistance for the target application environment.

Selection Notes

Select this component when a wide cathode current range up to 150 mA is required alongside precise voltage referencing. The low dynamic output impedance makes it suitable for noise-sensitive circuits. Consider the extended -60°C to +125°C operating range for harsh environmental conditions where standard industrial grade parts may fail.

Part Context

This part belongs to the H431 series of adjustable shunt regulators. It serves as a three-terminal device offering thermal stability over applicable temperature ranges. The H431LT variant specifically utilizes the SOT-23 surface mount package, providing a compact solution for space-constrained designs requiring reliable voltage reference or regulation functions.

Replacement Considerations

Datasheets indicate compatibility with generic H431 series components. Verify pinout and electrical limits against specific equivalents like TLVH431AQDBZT if substituting.