ZXRE250AW5-7

Overview

The ZXRE250AW5-7 is an adjustable precision shunt regulator manufactured by Diodes Incorporated, housed in a SOT-25-5 package. It features a reference voltage tolerance of ±1.0% at +25°C and operates within a temperature range of -40°C to +125°C. The device supports an output voltage setting from 2.5V to 36V using external divider resistors. Key electrical parameters include a typical minimum cathode current for regulation of 40µA, a maximum continuous cathode current of 150mA, and a dynamic output impedance of 0.2Ω typical.

Feature Summary

• Offers very low minimum cathode current for regulation, making it suitable for low-power applications.
• Provides excellent temperature stability with defined deviation limits across the operating range.
• Features low output noise and high sink current capability up to 100mA.

Applications

• Optocoupler linearisers
• Shunt regulators
• Improved Zener diode replacement
• Variable reference circuits

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for specific environmental declarations such as halogen-free or antimony-free certifications. Review datasheet revision history for any updates to absolute maximum ratings or thermal resistance values before finalizing procurement specifications.

Selection Notes

Select this component when a low-power adjustable shunt regulator is required with tight initial accuracy tolerances. Ensure the application circuit maintains cathode current between 0.065mA and 100mA for proper regulation. Consider the SOT-25 package dimensions and thermal dissipation characteristics relative to the expected ambient temperature conditions.

Part Context

This part belongs to the ZXRE250 series of three-terminal adjustable shunt regulators. It serves as a functional alternative to industry-standard devices like the TL431 but distinguishes itself through significantly lower minimum cathode current requirements. The series is designed for precision voltage referencing and regulation tasks where power efficiency is critical.

Replacement Considerations

Diodes Incorporated recommends using AP431SHA(B)N1TR-G1 as a replacement for ZXRE250B(A)SA-7 variants. Verify pinout compatibility and electrical parameter alignment when substituting with other shunt regulators from different manufacturers.

FAQ

What is the typical minimum cathode current required for regulation?

The typical minimum cathode current for regulation is 40µA.

How is the output voltage adjusted?

The output voltage can be set to any value between 2.5V and 36V by selecting appropriate external divider resistors.