TLVH431AQDBVT

Overview

The TLVH431AQDBVT is a low-voltage adjustable precision shunt regulator manufactured by Texas Instruments. It operates within a supply voltage range of 2.5 V to 20 V and provides an adjustable output voltage from 1.24 V to 18 V. The device features an initial accuracy of 1% and a temperature coefficient of 138 ppm/°C. It supports a maximum cathode current of 80 mA with a minimum operating current of 80 µA. The component is housed in a SOT-23-5 package and functions reliably across an extended temperature range of -40°C to +125°C.

Feature Summary

• Provides precise voltage regulation with 1% initial accuracy for stable reference applications
• Operates over a wide supply voltage range up to 20 V with adjustable output capability
• Supports high cathode current sinking up to 80 mA for robust load handling
• Designed for reliable performance across an extended industrial temperature range

Applications

• Precision voltage references in battery-powered equipment
• Voltage monitoring circuits requiring accurate threshold detection
• Feedback control loops in switching power supplies
• Portable devices needing low-power stable reference sources

Procurement Notes

Verify the specific suffix 'Q' indicates automotive qualification requirements when sourcing this component. Confirm the 'DBVT' suffix corresponds to the correct SOT-23-5 tape-and-reel packaging format. Ensure compatibility with RoHS directives and check for any lifecycle status changes such as obsolescence notices before finalizing procurement plans.

Selection Notes

Select this part when a low-voltage, high-accuracy shunt regulator is required for space-constrained designs. The SOT-23-5 package offers a compact footprint suitable for dense PCB layouts. Consider the 138 ppm/°C temperature coefficient if thermal stability is critical. Verify that the 80 mA cathode current capability meets the circuit's sink requirements compared to standard TL431 alternatives.

Part Context

This component belongs to the TLVH431 family of low-voltage adjustable shunt regulators. It serves as a modern alternative to traditional TL431 devices, offering improved performance at lower supply voltages. The family includes variants with different accuracy grades and packages, designed to meet diverse power management needs in consumer and industrial electronics.

Replacement Considerations

The TLVH431BQDBVT offers 0.5% accuracy as a higher-precision substitute. The TLV431AIDBVT is a non-automotive grade alternative with similar functionality but limited to 7 V input. Standard TL431 devices require higher operating voltages and may not fit low-voltage designs.