TL1431CDRG4

Overview

The TL1431CDRG4 is a precision programmable shunt reference in an 8-pin SOIC package. It features a 0.4% initial voltage tolerance and operates with cathode currents from 1mA to 100mA. The output voltage is adjustable between approximately 2.5V and 36V using two external resistors. It includes fast turn-on characteristics, low reference current, and typical output impedance of 0.2Ω.

Feature Summary

• Precision adjustable shunt regulation with specified thermal stability
• Fast turn-on characteristic suitable for Zener diode replacement
• Internal compensation ensures stability without output capacitors

Applications

• Adjustable voltage and current referencing
• Secondary side regulation in flyback SMPSs
• Voltage monitoring circuits
• Comparators with integrated reference

Procurement Notes

Verify the specific suffix 'G4' corresponds to lead-free and RoHS compliance requirements. Confirm the device grade matches the required operating temperature range for the target application environment before finalizing procurement.

Selection Notes

Select based on the required initial accuracy and operating temperature range. Ensure the design provides sufficient cathode current above the minimum regulation threshold. Verify stability boundaries if significant load capacitance is present at the cathode node.

Part Context

This component belongs to the TL1431 family of precision programmable references manufactured by Texas Instruments. It serves as a fundamental analog building block for power management and signal conditioning applications requiring accurate voltage referencing.

Replacement Considerations

TL1431CDR

FAQ

Is the TL1431 internally compensated?

Yes, the device is internally compensated to be stable without an output capacitor between the cathode and anode.

What is the minimum cathode current required for regulation?

A minimum cathode current of 1mA is required for the device to enter the proper linear region and maintain regulation.