ZR431LF02TC

Overview

The ZR431LF02TC is a three-terminal adjustable precision shunt regulator manufactured by Diodes Incorporated. It provides excellent temperature stability and an output current handling capability up to 25mA. The output voltage is programmable between 1.24V and 10V using two external divider resistors. This device features a 2.5% initial tolerance and a maximum temperature coefficient of 50ppm/°C. It operates within a cathode voltage range of VREF to 10V and supports a cathode current from 100µA to 25mA. The component is housed in a surface-mount SOT23 package.

Feature Summary

• Temperature compensated for operation over the full industrial temperature range
• Programmable output voltage set via external resistor divider
• Totally lead-free, fully RoHS compliant, and halogen-free green device

Applications

• Shunt regulator circuits
• Series regulator configurations
• Voltage monitoring systems
• Over-voltage and under-voltage protection
• Switch mode power supplies feedback control loops

Procurement Notes

Verify the specific ordering suffix against official Diodes Incorporated documentation to confirm exact packaging and tolerance specifications. Confirm that the requested part matches the required SOT23 surface mount package type. Ensure compliance with environmental directives such as RoHS and REACH if applicable to your manufacturing process. Cross-reference the manufacturer part number with authorized distributor catalogs to validate availability and authenticity before procurement.

Selection Notes

Select this component when a low-cost, adjustable reference with 2.5% accuracy is sufficient for the application. It serves as a direct replacement for standard zener diodes where improved performance and temperature stability are required. Consider the 25mA current sink limit and the 1.24V to 10V output range during circuit design. Verify that the SOT23 package dimensions fit the available PCB space constraints.

Part Context

The ZR431L series belongs to Diodes Incorporated's family of adjustable precision shunt regulators. These devices are designed to replace traditional zener diodes in applications demanding better regulation and lower temperature drift. The ZR431LF02TC specifically denotes the 2.5% tolerance variant packaged in SOT23. This series is widely utilized in consumer electronics and industrial power management systems requiring stable voltage references.

Replacement Considerations

ZR431LF01TA

FAQ

What is the minimum cathode current required for regulation?

The minimum cathode current for regulation is 100µA.

How is the output voltage determined?

The output voltage is set between 1.24V and 10V by selecting two external divider resistors connected to the reference pin.