TL1431AIYDT

Overview

The TL1431AIYDT is an adjustable shunt voltage reference manufactured by STMicroelectronics, designed for high-precision applications. It operates within a cathode-to-anode voltage range of up to 36 V and provides an adjustable output voltage from 2.5 V to 36 V using two external resistors. The device features an initial accuracy of ±0.25% and a temperature coefficient of 100 ppm/°C. It supports a sink current capability ranging from 1 mA to 100 mA with a typical dynamic impedance of 0.2 Ω. Qualified under AEC-Q100 standards, it functions reliably across an operating temperature range of -40°C to +125°C. The component is housed in an 8-SOIC surface-mount package.

Feature Summary

• AEC-Q100 qualified for automotive reliability requirements
• High precision with ±0.25% initial accuracy tolerance
• Wide operating temperature range suitable for harsh environments
• Adjustable output voltage configuration via external resistors

Applications

• Automotive power supply regulation systems
• Precision voltage reference circuits
• Battery management system monitoring
• Industrial control equipment power management

Procurement Notes

Verify the specific suffix 'AIYDT' against official STMicroelectronics documentation to confirm the exact pinout, tolerance grade, and packaging specifications. Ensure that the procurement source provides valid traceability documents required for AEC-Q100 automotive components. Cross-reference the manufacturer part number with authorized distributor lists to avoid counterfeit parts. Confirm compliance with RoHS3 directives as indicated in standard product classifications. Request detailed datasheets to validate thermal performance parameters before finalizing orders.

Selection Notes

Select this component when designing circuits requiring high stability and low drift over wide temperature variations. The ±0.25% accuracy makes it suitable for applications demanding tight voltage regulation without complex compensation networks. Consider the 8-SOIC package dimensions for PCB layout constraints. Evaluate the 100 mA sink current capability against the maximum load requirements of the reference circuit. Ensure the design accommodates the necessary external resistor network for setting the desired output voltage level within the 2.5 V to 36 V range.

Part Context

The TL1431 series represents a family of adjustable shunt voltage references widely used in power management applications. The TL1431AIYDT variant specifically targets automotive and industrial sectors due to its enhanced accuracy and extended temperature rating compared to standard commercial grades. It serves as a critical component in feedback loops for switching regulators and linear power supplies. The integration of AEC-Q100 qualification ensures compatibility with stringent automotive quality standards, distinguishing it from lower-grade counterparts in the same product line.

Replacement Considerations

Direct substitutes include other TL1431 variants with matching accuracy and package types, such as TL1431ACDYR or TL1431IDYR, provided they meet the specific ±0.25% tolerance requirement. Verify pin compatibility and thermal characteristics when considering cross-manufacturer alternatives like LM431 or KA431 series devices. Ensure that any replacement maintains the AEC-Q100 qualification if the application mandates automotive-grade reliability.