TL1431ACCT

Overview

The TL1431ACCT is an adjustable shunt voltage reference manufactured by STMicroelectronics, housed in a compact SOT-323-6L surface-mount package. It provides a programmable output voltage range from 2.5 V to 36 V using two external resistors. The device features a typical dynamic impedance of 0.2 Ω and supports a cathode current range from 1 mA to 100 mA. Initial accuracy is specified at ±1.0%, with a temperature coefficient of 90 ppm/°C. Operating temperatures span from 0°C to +70°C.

Feature Summary

• Adjustable output voltage capability spanning 2.5 V to 36 V via external resistor network
• Compact six-pin SOT-323 surface-mount package design for space-constrained applications
• Wide operating cathode current range supporting low-power standby and high-current sink modes

Applications

• Programmable power supplies requiring precise voltage regulation
• Voltage references for battery-powered equipment
• Linear regulators utilizing feedback control loops
• Switching power supply output regulation circuits

Procurement Notes

Verify the specific suffix ACCT against official STMicroelectronics documentation to confirm the exact tolerance grade and packaging configuration. Ensure the selected variant matches the required thermal performance and pinout compatibility for the target PCB layout. Cross-reference datasheet specifications for electrical limits before finalizing procurement orders.

Selection Notes

Select this component when a small footprint is critical alongside standard 2.5 V to 36 V reference requirements. The ±1.0% initial accuracy suits general-purpose applications where tighter tolerances are unnecessary. Consider the 0°C to +70°C operating range to ensure suitability for commercial environments without extended industrial cooling needs.

Part Context

The TL1431 series represents a family of adjustable shunt voltage references designed for cost-effective precision regulation. This specific part belongs to the broader TL1431 lineup, offering reliable performance across various power management topologies. It serves as a fundamental building block for feedback networks in diverse electronic systems requiring stable reference voltages.

Replacement Considerations

Direct substitutes include the TL431ACCT from Texas Instruments, which shares similar electrical characteristics and package dimensions. Verify pin compatibility and thermal specifications when transitioning between manufacturers to ensure seamless integration into existing designs.