LM4431M3-2.5

Voltage Reference Overview

The LM4431M3-2.5 is a micropower shunt voltage reference manufactured by Texas Instruments, originally from National Semiconductor. It provides a fixed output voltage of 2.5V with high precision and low temperature coefficient. The device operates within a supply voltage range of 2.7V to 20V and draws a typical quiescent current of 6µA. It features an initial accuracy of ±0.2% and is housed in a compact SOT-23-3 surface-mount package. The component supports operation across an extended temperature range from -40°C to +85°C.

Voltage Reference Feature Summary

• Fixed 2.5V output voltage for stable reference applications
• Micropower consumption with ultra-low quiescent current
• High precision with tight initial accuracy tolerance
• Low temperature coefficient for thermal stability

Voltage Reference Applications

• Portable battery-powered instrumentation
• Precision data acquisition systems
• Handheld meters and test equipment
• Medical devices requiring stable voltage references

Voltage Reference Procurement Notes

Verify the manufacturer origin as this part was originally produced by National Semiconductor before its acquisition by Texas Instruments. Confirm the specific suffix indicates the 2.5V variant and SOT-23-3 package. Ensure RoHS compliance status matches current inventory requirements. Check datasheet revisions for any updates to electrical characteristics or recommended operating conditions prior to final design integration.

Voltage Reference Selection Notes

Select this component when a fixed 2.5V reference is required with minimal power consumption. It is suitable for space-constrained designs due to the small SOT-23-3 footprint. Consider the ±0.2% initial accuracy and low tempco for applications demanding high precision without external trimming. Compare against adjustable references if variable output voltages are needed instead.

Voltage Reference Part Context

The LM4431 series belongs to the family of micropower shunt voltage references designed for cost-sensitive and battery-operated applications. Originally developed by National Semiconductor, these parts are now supported under the Texas Instruments portfolio. The LM4431M3-2.5 specifically offers a fixed 2.5V output, distinguishing it from adjustable variants like the LM431. It serves as a stable reference source in analog circuits where low power and high accuracy are critical.

Voltage Reference FAQ

What is the maximum supply voltage for the LM4431M3-2.5?

The maximum supply voltage is 20V.

Does the LM4431M3-2.5 have an adjustable output voltage?

No, it provides a fixed output voltage of 2.5V.

What is the typical quiescent current consumption?

The typical quiescent current is 6µA.