TLV431ACDBZR

Overview

The TLV431ACDBZR is a low-voltage, three-terminal adjustable precision shunt regulator manufactured by Texas Instruments. It operates within an output voltage range of 1.24 V to 6 V and features an initial accuracy of ±1%. The device utilizes a SOT-23-3 surface-mount package with dimensions of 2.92 mm in length, 1.3 mm in width, and 1 mm in height. It supports a maximum cathode current of 15 mA and maintains a typical output impedance of 0.25 Ω. The component functions across a temperature range of 0°C to +70°C with a temperature coefficient of 138 ppm/°C.

Feature Summary

• Provides precise voltage regulation suitable for low-voltage applications
• Features active output circuitry for sharp turn-on characteristics
• Offers high stability with low output drift over temperature variations

Applications

• Secondary side regulation in flyback switch-mode power supplies
• Isolated feedback circuits for 3V to 3.3V SMPS systems
• Adjustable voltage and current reference sources
• Voltage monitoring and supervisory circuits

Procurement Notes

Verify the specific suffix 'ACDBZR' to confirm the ±1% accuracy grade and commercial temperature range (0°C to +70°C). Ensure the ordering code matches the SOT-23-3 tape-and-reel packaging format required for automated assembly processes. Cross-reference the manufacturer part number against official datasheets to validate RoHS compliance status and lead time specifications before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring a precision reference below 6 V with tight tolerance requirements. The low minimum operating voltage makes it ideal for battery-powered or low-voltage logic systems where standard Zener diodes lack sufficient accuracy. Consider the thermal performance and package size constraints when choosing between this variant and other accuracy grades within the TLV431 family.

Part Context

This device belongs to the TLV431 series of adjustable shunt regulators designed as low-voltage alternatives to traditional TL431 components. It integrates a bandgap reference and error amplifier to provide stable regulation in compact surface-mount packages. The series is widely utilized in modern power management designs requiring small form factors and high precision for feedback control loops.

Replacement Considerations

Direct substitutes include the TLV431AIDBZR for identical electrical specifications with potentially different manufacturing lots. For higher accuracy requirements, consider the TLV431BAIDBZR variant. Verify pinout compatibility and thermal characteristics when replacing legacy TL431 devices in existing PCB layouts.