TL1431CL5T

Overview

The TL1431CL5T is an adjustable shunt voltage reference manufactured by STMicroelectronics, housed in a SOT-23-5 surface-mount package. It provides a guaranteed temperature stability over the operating range with a ±0.4% initial precision tolerance. The output voltage is programmable between 2.5 V and 36 V using two external resistors. The device operates within a cathode current range of 1 mA to 100 mA and features a typical dynamic impedance of 0.2 Ω. It supports an operating temperature range from -20°C to +70°C (TA) and has a temperature coefficient of 90ppm/°C.

Feature Summary

• Adjustable output voltage capability ranging from 2.5 V to 36 V via external resistor divider
• High initial precision with ±0.4% tolerance for accurate reference applications
• Wide sink current operational range from 1 mA to 100 mA
• Low typical dynamic output impedance ensuring stable regulation

Applications

• Precision power supply regulation circuits
• Portable equipment requiring compact voltage references
• Battery-powered systems needing stable reference voltages
• General-purpose linear and switching regulator feedback loops

Procurement Notes

Verify the specific suffix CL5T corresponds to the required ±0.4% precision grade and SOT-23-5 packaging configuration. Confirm that the commercial temperature range (-20°C to +70°C) aligns with the target application environment requirements. Ensure compatibility with RoHS3 standards if environmental compliance is mandatory for the final assembly process.

Selection Notes

Select this component when high accuracy is required in a small footprint. The ±0.4% tolerance offers better precision than standard ±1% variants. Consider the SOT-23-5 package for space-constrained PCB layouts. Verify that the 100 mA maximum cathode current meets the load requirements of the specific circuit design without exceeding thermal limits.

Part Context

This part belongs to the TL1431 family of adjustable shunt voltage references. The family includes variants with different tolerances such as ±1.0% and ±0.25%, and various package options including SOT-23 and SC-70. The TL1431 series is widely used in industrial and consumer electronics for providing stable reference voltages in power management applications.

Replacement Considerations

Compatible substitutes include other TL1431 variants with matching or tighter tolerances, such as TL1431ACLT or TL1431IDT, provided the package and electrical specifications are compatible. Ensure any replacement maintains the same pinout and voltage range capabilities.