TL431ACDBZT

Overview

The TL431ACDBZT is a precision programmable shunt voltage reference 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 2.495 V to 36 V. The device features an initial accuracy of ±1% and a temperature coefficient of 92 ppm/°C. It supports a maximum cathode current of 100 mA and functions reliably across an operating temperature range of -40°C to +85°C. The component is housed in a compact SOT-23-3 surface-mount package, designed for efficient space utilization in power management circuits.

Feature Summary

• Provides precise adjustable voltage referencing with high initial accuracy
• Operates as a shunt regulator with wide input voltage capability
• Utilizes a compact three-pin surface-mount package for board space efficiency

Applications

• Precision voltage references in power supply circuits
• Programmable output regulators
• Comparator reference voltage sources

Procurement Notes

Verify the specific suffix DBZT confirms the SOT-23-3 package and tape-and-reel packaging format. Ensure the AC grade designation matches the required ±1% initial accuracy tolerance for the application. Confirm the industrial temperature range (-40°C to +85°C) aligns with environmental constraints. Cross-reference the manufacturer part number against official Texas Instruments documentation to validate authenticity and current production status before procurement.

Selection Notes

Select this component when a low-cost, high-accuracy shunt regulator is required in a small footprint. The SOT-23-3 package suits applications with strict space limitations. The ±1% accuracy is suitable for general-purpose precision tasks. Consider the thermal performance within the specified operating range. Evaluate if the 100 mA cathode current limit meets the circuit's load requirements compared to higher-current alternatives.

Part Context

The TL431 series represents a widely adopted family of programmable shunt regulators known for reliability and cost-effectiveness. The TL431ACDBZT variant specifically integrates the AC accuracy grade into the DBZT package style. This places it within the standard Texas Instruments portfolio for general-purpose analog signal conditioning and power control applications requiring stable reference voltages.

Replacement Considerations

Direct pin-compatible substitutes include other TL431 variants with matching package and accuracy grades, such as TL431AIDBZR or TL431AQDBZT. Verify that alternative parts maintain the same SOT-23-3 footprint and ±1% tolerance specifications to ensure seamless integration without circuit redesign.