LM4431M3-2.5/NOPB

Voltage Reference Overview

The LM4431M3-2.5/NOPB is a micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 2.5V with an initial accuracy of 0.5%. The device operates within a supply voltage range of 2.7V to 20V and supports a maximum shunt current of 20mA. It functions effectively across an extended temperature range from -40°C to +85°C. The component utilizes a compact SOT-23-3 surface-mount package, designed for low-power applications requiring stable voltage regulation.

Voltage Reference Feature Summary

• Provides a precise fixed 2.5V reference output
• Features micropower consumption for battery efficiency
• Includes internal compensation for stability

Voltage Reference Applications

• Portable battery-powered instrumentation
• Handheld measurement devices
• Battery chargers and power management systems

Voltage Reference Procurement Notes

Verify the specific suffix M3-2.5 indicates the fixed 2.5V output variant. Confirm RoHS compliance status via the official datasheet. Ensure the SOT-23-3 package matches the PCB footprint requirements. Check for any specific handling precautions during assembly.

Voltage Reference Selection Notes

Select this component when a fixed 2.5V reference is required in space-constrained designs. It is suitable for applications prioritizing low quiescent current over high load capability. Compare against adjustable references if variable output voltages are needed later in the design phase.

Voltage Reference Part Context

This part belongs to the LM4431 family of micropower shunt voltage references. It serves as a cost-effective alternative to Zener diodes, offering superior temperature stability and lower noise. The NOPB suffix denotes lead-free construction, aligning with modern environmental manufacturing standards.

Voltage Reference Replacement Considerations

LM4431M3-2.5/NOPB.A is a documented equivalent variant within the same product line.