TLVH431BILPRE3

Overview

The TLVH431BILPRE3 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 0.5% and a maximum temperature coefficient of 138 ppm/°C. It supports a cathode current range from 80 µA to 80 mA and functions reliably across an operating temperature range of -40°C to +125°C. The component is housed in a TO-92-3 through-hole package.

Feature Summary

• Adjustable output voltage capability spanning 1.24 V to 18 V via external resistor divider
• Low operating current consumption suitable for power-constrained designs
• Wide operating current range supporting sink currents up to 80 mA
• Guaranteed thermal stability over the full industrial temperature range

Applications

• Battery-operated equipment requiring low quiescent current
• Switch-mode power supplies utilizing precise reference voltages
• Data acquisition systems needing stable voltage references
• Portable devices where space-saving surface mount or through-hole options are utilized

Procurement Notes

Verify the specific suffix 'PRE3' indicates RoHS compliance and lead-free status as per Texas Instruments documentation. Confirm the package type matches the required PCB footprint, specifically the TO-92-3 configuration. Check for any Product Change Notifications (PCN) regarding material changes or manufacturing site transfers that may affect long-term availability or mechanical dimensions. Ensure the ordering part number aligns with the desired tolerance and temperature grade specifications.

Selection Notes

Select this component when a low-voltage adjustable reference is required with high accuracy. The 0.5% initial accuracy makes it suitable for applications demanding tighter voltage tolerances than standard 1% or 2% variants. Consider the 80 µA minimum cathode current requirement for circuit design to ensure proper regulation. Evaluate the 138 ppm/°C temperature coefficient against the thermal environment of the target application to determine if additional compensation is necessary.

Part Context

This part belongs to the TLVH431 family of low-voltage adjustable shunt regulators designed for cost-sensitive and power-efficient applications. Unlike higher voltage counterparts, this series is optimized for operation below 20 V. The 'B' designation typically denotes the 0.5% accuracy grade, while 'I' indicates the industrial temperature range. The 'L' often signifies the leaded package variant, distinguishing it from tape-and-reel surface mount versions.

Replacement Considerations

TLVH431AILPRE3 offers 1% accuracy instead of 0.5%. TLVH431MILPRE3 provides 1.5% accuracy. For non-low-voltage requirements, the TL431 series serves as a higher voltage alternative but requires different biasing considerations.