TL431IDBZT

Overview

The TL431IDBZT is a precision programmable shunt regulator manufactured by Texas Instruments, housed in a five-pin SOT-23 package. It operates with an adjustable output voltage range from 2.5 V to 36 V and maintains an initial accuracy of ±1.0%. The device supports a maximum cathode current of 100 mA and functions within a temperature range of -40 °C to +85 °C. Key electrical specifications include a typical dynamic impedance of 0.22 Ω and a reference voltage tolerance of ±1.0% at 25 °C. The component requires a minimum operating current of 1 mA for stable regulation.

Feature Summary

• Provides precise voltage regulation through external resistor network programming
• Features low dynamic impedance for effective noise filtering and stability
• Offers wide operating voltage range suitable for diverse power supply architectures

Applications

• Precision voltage references in portable electronic devices
• Programmable output control in switching power supplies
• Voltage monitoring circuits in battery-powered systems

Procurement Notes

Verify the specific suffix 'DBZT' against the manufacturer's official datasheet to confirm the tape-and-reel packaging configuration and moisture sensitivity level. Ensure that the order matches the required temperature grade and accuracy class specified in the design documentation. Cross-reference the part number with the latest Texas Instruments product change notifications to confirm manufacturing site and assembly details.

Selection Notes

Select this component when a compact surface-mount solution is required for high-accuracy voltage referencing. The SOT-23-5 package offers space efficiency compared to larger alternatives. Consider the ±1.0% initial accuracy and thermal performance limits when designing for extreme environmental conditions. Evaluate the need for additional compensation components based on the load capacitance requirements for loop stability.

Part Context

The TL431 series represents a widely adopted family of three-terminal shunt regulators known for their reliability and cost-effectiveness. This specific model belongs to the standard industrial-grade lineup, distinct from automotive-qualified variants like the TL431-Q1. It serves as a fundamental building block for feedback loops in analog and mixed-signal power management designs.

Replacement Considerations

Public confirmed substitute part numbers include TL431AIDBVT and TL431IDBVR. Verify pinout compatibility and electrical parameter alignment before substitution.