TLV431BLP

Overview

The TLV431BLP 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 ±0.5% at 25 °C, expanding to ±1.0% 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

• Provides high precision voltage regulation with ±0.5% tolerance at room temperature
• Features a sharp low current turn-on characteristic for efficient operation
• Maintains low dynamic output impedance across the specified operating current range

Applications

• Error amplifier for isolated low output voltage switching power supplies
• Adjustable voltage or current linear and switching power supplies
• Voltage monitoring circuits
• Current source and sink applications
• Low voltage zener diode replacements

Procurement Notes

Verify that the component matches the specific B series accuracy requirements of ±0.5% at 25 °C. Confirm the TO-92-3 package designation aligns with board layout constraints. Ensure the procurement channel provides documentation confirming compliance with the specified industrial temperature range limits.

Selection Notes

Select this component when precise voltage referencing is required within a low voltage environment. The B series accuracy is suitable for applications demanding tighter tolerances than the A series. Consider the thermal resistance characteristics of the TO-92-3 package for heat dissipation needs in the target design.

Part Context

This device belongs to the TLV431 family of low voltage precision adjustable shunt regulators. It serves as a direct replacement for standard zener diodes in circuits requiring higher accuracy and stability. The family includes variants with different accuracy grades and packaging options to suit various manufacturing and performance requirements.

Replacement Considerations

TLV431ALP

FAQ

What is the minimum cathode current required for regulation?

The minimum cathode current for regulation is typically 55 μA.

How does the TLV431BLP function in a feedback loop?

When combined with an optocoupler, it acts as an error amplifier to control the feedback loop in isolated switching power supplies.