LM431CCZ/NOPB

Voltage Reference Overview

The LM431CCZ/NOPB is an adjustable precision Zener shunt regulator manufactured by Texas Instruments. It operates within a voltage range of 2.495 V to 36 V and features an initial accuracy of ±0.5%. The device supports a maximum shunt current of 100 mA with a temperature coefficient of 50 ppm/°C. It functions across a wide operating temperature range from -40°C to +85°C. The component utilizes a TO-92-3 through-hole package, ensuring compatibility with standard PCB layouts for power management applications requiring stable reference voltages.

Voltage Reference Feature Summary

• Provides adjustable precision voltage regulation via a three-terminal shunt architecture
• Delivers high initial accuracy of ±0.5% for precise reference requirements
• Supports up to 100 mA cathode current for robust load handling
• Operates reliably across extended industrial temperature ranges

Voltage Reference Applications

• Precision voltage references in power supply circuits
• Programmable linear regulators
• Comparator reference voltage sources
• Battery charging control circuits

Voltage Reference Procurement Notes

Verify the specific suffix 'CCZ' indicates the ±0.5% accuracy grade and TO-92-3 package configuration. Confirm RoHS compliance status as indicated by the NOPB suffix. Ensure the supplier provides official Texas Instruments documentation to validate the part number against obsolescence notices or recent manufacturing changes. Cross-reference the datasheet revision date to ensure parameter consistency.

Voltage Reference Selection Notes

Select this component when ±0.5% initial accuracy is required rather than the standard ±1% or ±2% grades available in the LM431 family. The TO-92-3 package is suitable for through-hole assembly processes. Consider the 50 ppm/°C temperature coefficient for thermal stability needs. Verify that the 36 V maximum input voltage meets the circuit's operational limits compared to other variants offering higher voltage tolerances.

Voltage Reference Part Context

This part belongs to the LM431 series of adjustable precision shunt regulators. It serves as a direct replacement for legacy TL431 devices in many designs. The LM431 family is widely used for voltage referencing and regulation. The CCZ variant specifically denotes the tighter tolerance and through-hole packaging format offered by Texas Instruments.

Voltage Reference Replacement Considerations

LM431CCZ is the non-RoHS predecessor. LM431ACM/NOPB offers surface mount packaging with similar electrical characteristics. LM431CIM3/NOPB provides SOT-23-3 surface mount options.