TLVH431AIL3T

Overview

The TLVH431AIL3T is a low-power adjustable shunt voltage reference manufactured by STMicroelectronics. It operates within an input voltage range of 2.5 V to 36 V and provides an adjustable output voltage from 1.24 V to 18 V via an external resistor divider. The device features a typical dynamic impedance of 0.22 Ω and supports a cathode current range from 100 µA to 60 mA. It offers initial accuracy options including 0.25%, 0.5%, 1%, and 1.5%, with the AIL3T suffix denoting 0.5% precision. The component maintains a maximum temperature coefficient of 100 ppm/°C across an operating temperature range of -40°C to +125°C.

Feature Summary

• Adjustable output voltage capability set between 1.24 V and 18 V using external resistors
• Low power consumption with minimum operating current of 100 µA at 25 °C
• High sink current capability up to 60 mA for robust load handling
• Guaranteed thermal stability over extended industrial temperature ranges

Applications

• Battery chargers
• Switch mode power supplies
• Battery operated equipment
• Data acquisition systems
• Computers

Procurement Notes

Verify the specific suffix configuration when ordering, as it determines the initial accuracy tolerance (e.g., 'AI' indicates 0.5%). Confirm the package type matches the design requirements, as the TLVH431 series is available in SOT-23-3L, SOT-23-5L, and SOT-323-6L. Ensure the selected variant meets the required operating temperature range and current specifications for the target application environment.

Selection Notes

Select this component for designs requiring space-saving surface-mount packages like SOT-23 or SOT-323. It is suitable for power-restricted applications due to its low quiescent current. Choose based on the required voltage precision; the 'AI' suffix provides 0.5% accuracy. Ensure the circuit can support the minimum 100 µA cathode current for proper regulation and verify that the maximum sink current of 60 mA aligns with the load requirements.

Part Context

The TLVH431 belongs to a family of three-terminal adjustable shunt voltage references designed for high performance in compact form factors. Unlike standard Zener diodes, it offers precise voltage setting and lower dynamic impedance. The series includes variants with different accuracies and package styles, allowing designers to optimize for cost, size, and precision in portable and industrial electronics.

Replacement Considerations

Public confirmed substitute part numbers include TLVH431BICT and TLVH431ACDCKR. Verify pinout compatibility and electrical parameter alignment before substitution.