TLV431ACLPRE3

Overview

The TLV431ACLPRE3 is a low-voltage, adjustable precision shunt regulator manufactured by Texas Instruments. It operates within an input voltage range of 2.5 V to 36 V and provides an adjustable output voltage from 2.495 V to 36 V. The device features an initial accuracy of ±1% and a maximum temperature coefficient of 138 ppm/°C. It supports a cathode current range from 80 µA to 15 mA and functions reliably across an operating temperature range of -40°C to +125°C. Packaged in a TO-92-3 through-hole format, it serves as a high-performance reference for power management applications.

Feature Summary

• Provides precise adjustable voltage referencing with tight initial accuracy tolerance
• Operates at low voltages suitable for modern low-power circuit designs
• Features active output circuitry for fast transient response characteristics

Applications

• Secondary side regulation in flyback switch-mode power supplies
• Isolated feedback circuits in 3V to 3.3V SMPS systems
• Replacement for Zener diodes in board-level voltage stabilization
• Voltage monitoring and comparator reference applications

Procurement Notes

Verify the specific suffix 'E3' indicates lead-free compliance and RoHS standards during procurement. Confirm the package type matches the required TO-92-3 form factor for your PCB layout. Ensure the operating temperature range meets your system's environmental requirements. Cross-reference the datasheet revision to confirm pinout consistency with existing designs.

Selection Notes

Select this component when a low-cost, high-accuracy shunt regulator is needed for low-voltage applications. It is ideal for replacing standard Zener diodes where better stability and lower dynamic impedance are required. Consider the TO-92 package if through-hole mounting is preferred over surface-mount alternatives like SOT-23.

Part Context

This part belongs to the TLV431 family of adjustable shunt regulators designed for low-voltage operation. Unlike the traditional TL431 which requires higher voltages, the TLV431 series operates efficiently at lower supply levels. The 'A' designation typically denotes improved accuracy specifications compared to standard variants within the same product line.

Replacement Considerations

The TL431ACLPRE3 is listed as obsolete. Verified replacement or upgrade options include the TLVH431AQLPRE3 or other compatible shunt regulators from the manufacturer's portfolio that maintain similar electrical characteristics and package dimensions.