TLV431BCDBZR

Overview

The TLV431BCDBZR is a low-voltage, three-terminal adjustable precision shunt regulator manufactured by Texas Instruments. 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 36 V. The device features an initial accuracy of ±0.5% and a temperature coefficient of 92 PPM/°C. It supports a maximum cathode current of 100 mA with a minimum operating current of 600 µA. Designed for surface-mount applications, it is housed in a TSSOP-8 package and functions reliably across an industrial temperature range of -40°C to +125°C.

Feature Summary

• Provides precise voltage regulation with ±0.5% initial accuracy for stable reference performance.
• Features a low temperature coefficient of 92 PPM/°C to maintain stability across varying thermal conditions.
• Supports high cathode current capability up to 100 mA for robust load driving.
• Offers wide input voltage operation from 2.5 V to 36 V for flexible system integration.

Applications

• Secondary side regulation in flyback switch-mode power supplies
• Precision voltage references in battery-powered equipment
• Voltage monitoring circuits requiring high accuracy
• Comparator applications with integrated reference

Procurement Notes

Verify the specific suffix 'G4' if RoHS compliance documentation is required, as this indicates lead-free status. Confirm the TSSOP-8 package type matches your PCB footprint requirements. Ensure the operating environment stays within the specified -40°C to +125°C range to maintain the stated 92 PPM/°C temperature coefficient. Check for any recent product change notices regarding manufacturing site transitions.

Selection Notes

Select this component when high accuracy and wide voltage range are needed in a compact surface-mount package. It serves as a direct replacement for legacy TO-220 or DIP packages in space-constrained designs. Consider the 100 mA current limit for load requirements; higher current needs may require external pass transistors. The TSSOP-8 package offers thermal advantages over older plastic packages while maintaining pin compatibility with standard footprints.

Part Context

This part belongs to the TL431 family of programmable shunt regulators, widely used in isolated feedback loops. The TLV431 variant specifically targets low-voltage applications but maintains compatibility with higher voltage systems up to 36 V. It replaces older discrete Zener diode solutions with superior accuracy and lower dynamic impedance. The BCDBZR designation indicates the commercial grade accuracy and TSSOP-8 packaging format.

Replacement Considerations

TLV431BCDBZRG4 is the RoHS-compliant version of this component. For automotive applications, consider the AEC-Q100 qualified TLV431BQ series. Direct pin-compatible alternatives include the LM431AIMX from National Semiconductor. Verify that substitute parts meet the same 92 PPM/°C temperature coefficient requirement for critical reference applications.