TLV431ACDBVT Replacement: TS431IYLT, TS431BIYLT

Original Part

TLV431ACDBVT

Texas Instruments

Shunt Voltage Reference IC Adjustable 1.24V 6 VV ±1% 15 mA SOT-23-5

Alternative Part

TS431IYLT

STMicroelectronics

Shunt Voltage Reference IC Adjustable 1.24V 6 VV ±2% 30 mA SOT-23-5

TS431BIYLT

STMicroelectronics

Shunt Voltage Reference IC Adjustable 1.24V 6 VV ±0.5% 30 mA SOT-23-5

1. TS431IYLT Substitution Conclusion The TS431IYLT can substitute the TLV431ACDBVT, but it should be noted that this is a downgraded replacement. Key differences include: accuracy decreases from ±1% to ±2%, and initial output voltage tolerance is wider, which may make it unsuitable for high-precision reference applications. However, its output current increases from 15mA to 30mA, providing stronger drive capability. The quiescent cathode current is reduced from 80µA to 60µA, contributing to lower power consumption. Additionally, it carries the automotive-grade AEC-Q100 qualification, making it suitable for harsher operating environments. This substitution is acceptable if the application has relaxed accuracy requirements but demands higher load capability or automotive-grade reliability.

2. TS431BIYLT Substitution Conclusion The TS431BIYLT can replace the TLV431ACDBVT and represents an upgraded alternative. Key performance differences include: improved accuracy from ±1% to ±0.5%, offering higher initial voltage precision; output current is doubled from 15mA to 30mA, enhancing load drive capability; quiescent cathode current drops from 80µA to 60µA, reducing power consumption; and it is AEC-Q100 qualified for automotive applications. Although its temperature coefficient is specified as 100ppm/°C (while TI’s part does not specify this parameter), overall performance is superior. This substitute is well-suited for applications requiring higher precision, greater drive capability, or improved reliability.

Analysis ID: 7BEC-576F000

Based on part parameters and for reference only. Not to be used for procurement or production.