UC39431DTR

Overview

The UC39431DTR is a precision adjustable shunt regulator manufactured by Texas Instruments. It features an integrated reference voltage of 1.3 V with a tolerance of ±0.39%. The device supports an output current capability of 100 mA and operates within a cathode voltage range of 3.6 V to 36 V. It is housed in an 8-pin SOIC package suitable for surface mount technology.

Feature Summary

• Precision analog control with tight reference voltage tolerance
• Adjustable shunt regulation architecture
• High output current drive capability

Applications

• Low voltage DC electronic loads
• Precision voltage reference circuits
• Power supply feedback loop control

Procurement Notes

Verify the specific suffix 'DTR' indicates tape-and-reel packaging versus tube variants. Confirm RoHS compliance status through official documentation. Ensure moisture sensitivity level requirements are met for storage and handling procedures prior to assembly.

Selection Notes

Select this component when precise shunt regulation is required with high accuracy. The 100 mA output current suits moderate load applications. The wide operating voltage range allows flexibility in various power management topologies compared to fixed-reference alternatives.

Part Context

This part belongs to the UC3943x series of precision analog controllers from Texas Instruments. It serves as a specialized shunt regulator alternative to general-purpose Zener diodes, offering superior stability and adjustability for critical power management designs requiring tight voltage control.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Verify compatibility with existing circuit parameters before considering alternative manufacturers or pin-compatible devices.