TLV431ALPRA

Overview

The TLV431ALPRA is a low voltage precision adjustable shunt regulator manufactured by onsemi. It features a programmable output voltage range from 1.24 V to 16 V and offers a guaranteed reference accuracy of ±1.0% at 25 °C, extending to ±2.0% over the industrial temperature range of -40 °C to 85 °C. The device exhibits a sharp low current turn-on characteristic with a dynamic impedance of 0.20 Ω across an operating current range of 100 µA to 20 mA. It is housed in a TO-92-3 package.

Feature Summary

• Programmable output voltage range spanning 1.24 V to 16 V
• Guaranteed reference accuracy of ±1.0% at 25 °C
• Sharp low current turn-on characteristic
• Low dynamic output impedance of 0.20 Ω

Applications

• Low output voltage switching power supply error amplifier
• Adjustable voltage or current linear and switching power supplies
• Voltage monitoring circuits
• Current source and sink applications
• Precision references for analog and digital circuits

Procurement Notes

Verify that the component matches the specific TLV431ALPRA designation to ensure correct tolerance and package configuration. Confirm the presence of the LP suffix indicates the TO-92-3 through-hole package type. Ensure compliance with RoHS standards if lead-free variants are required for assembly processes. Cross-reference ordering information to validate shipping formats such as tape and reel specifications.

Selection Notes

Select this component when precise voltage referencing is required within a low voltage environment. The ±1.0% accuracy makes it suitable for applications demanding tighter tolerances than standard Zener diodes. Consider the wide operating current range for designs requiring stable regulation under varying load conditions. Evaluate thermal characteristics and package constraints to ensure compatibility with the target PCB layout and ambient operating temperatures.

Part Context

This device belongs to the TLV431 series of low voltage precision adjustable shunt regulators produced by onsemi. It serves as a direct replacement for traditional Zener diodes in circuits requiring higher precision and stability. The series includes variants like the TLV431B with improved accuracy and different packaging options including TSOP-5 and SOT-23-3 to accommodate space-constrained designs.

Replacement Considerations

TLV431BLPRA

FAQ

What is the minimum cathode current required for regulation?

The minimum cathode current for regulation is typically 55 µA.

How does the reference accuracy vary over temperature?

The reference accuracy is ±1.0% at 25 °C and extends to ±2.0% over the full industrial temperature range of -40 °C to 85 °C.