ZXRE252ASA-7

Overview

The ZXRE252ASA-7 is a three-terminal adjustable precision shunt regulator from Diodes Incorporated, housed in an SOT-23 package. It provides an output voltage range of 2.5 V to 36 V, set via external resistors. The device features an initial accuracy of 1% and supports a maximum cathode current of 100 mA with a minimum regulation current of 65 µA. Operating temperatures span from -40 °C to +125 °C, with a maximum supply voltage of 36 V and a typical power supply current of 4 µA.

Feature Summary

• Adjustable output voltage capability between 2.5 V and 36 V using two external divider resistors
• Very low minimum cathode current for regulation, enabling efficient operation in low-power applications
• Excellent temperature stability with specified reference voltage tolerance at +25°C
• Low output noise and high sink current handling up to 100 mA

Applications

• Optocoupler linearizers
• Shunt regulators
• Improved Zener diode replacements
• Variable reference circuits

Procurement Notes

Verify the component grade matches the required initial tolerance specifications before procurement. Confirm that the SOT-23 package dimensions align with the target PCB layout constraints. Ensure the operating environment remains within the specified temperature range to maintain electrical performance standards. Check for any specific environmental compliance requirements regarding halogen-free or lead-free manufacturing processes.

Selection Notes

Select this component when a precise, adjustable voltage reference is needed with minimal quiescent current consumption. The 1% initial tolerance suits general-purpose precision applications requiring better stability than standard Zener diodes. Consider the thermal resistance characteristics if significant power dissipation is expected during continuous operation under load conditions.

Part Context

This part belongs to the ZXRE25x series of very low cathode current adjustable precision shunt regulators manufactured by Diodes Incorporated. It serves as a high-performance alternative to traditional Zener diodes, offering superior temperature stability and lower noise characteristics suitable for sensitive analog signal processing and reference voltage generation tasks.

Replacement Considerations

Public confirmed substitute part numbers include AP431SHA(B)N1TR-G1 for ZXRE250B(A)SA-7 and AP431SHA(B)NTR-G1 for ZXRE252B(A)SA-7.