TL1431ACL3T

Overview

The TL1431ACL3T is an adjustable shunt voltage reference manufactured by STMicroelectronics, housed in a SOT-23-3 surface-mount package. It provides a guaranteed temperature stability over the operating range with a typical dynamic impedance of 0.2 Ω. The output voltage is programmable between 2.5 V and 36 V using two external resistors. This component operates within a cathode current range of 1 mA to 100 mA and features an initial accuracy of ±0.25%. It supports a working temperature range from -20°C to +70°C (TA) and has a temperature coefficient of 90 ppm/°C.

Feature Summary

• Adjustable output voltage capability ranging from 2.5 V to 36 V via external resistor divider
• High precision with ±0.25% initial accuracy for stable reference applications
• Wide sink current range supporting operation from 1 mA to 100 mA
• Low dynamic impedance ensuring effective regulation under varying load conditions

Applications

• Precision power supply regulation circuits
• Programmable linear regulators requiring stable reference
• Battery-operated equipment needing accurate voltage monitoring
• Over-voltage protection circuits

Procurement Notes

Verify the specific suffix ACL3T to confirm the SOT-23-3 package and ±0.25% tolerance grade. Ensure the application environment remains within the specified -20°C to +70°C operating temperature range. Confirm that the required cathode current stays within the 1 mA to 100 mA operational limits for optimal performance. Check RoHS compliance status if environmental regulations apply to the final assembly.

Selection Notes

Select this component when a compact SOT-23-3 footprint is required alongside high precision. The ±0.25% accuracy makes it suitable for applications demanding tight voltage tolerances. Consider the thermal coefficient of 90 ppm/°C for designs sensitive to temperature variations. Ensure the design can accommodate the necessary external resistors for setting the desired output voltage level.

Part Context

This part belongs to the TL1431 series of adjustable shunt voltage references. The series is widely used in power management applications where a stable reference voltage is critical. Other variants in the family may offer different accuracies, packages, or extended temperature ranges, but the ACL3T specifically targets cost-effective, space-constrained designs with high precision requirements.

Replacement Considerations

Direct replacements must match the SOT-23-3 package and ±0.25% accuracy. Verify pinout compatibility before substitution. Alternative parts from other manufacturers may require schematic adjustments due to differences in dynamic impedance or current handling capabilities.