LM431AIM

Voltage Reference Overview

The LM431AIM is a two-terminal adjustable shunt voltage reference manufactured by National Semiconductor. It operates within an input voltage range of 2.5 V to 36 V and provides an output current capability of up to 100 mA. The device features an adjustable reference voltage starting from 2.495 V with a typical tolerance of ±1%. It exhibits a temperature coefficient of 50 ppm/°C and functions reliably across an operating temperature range of -40°C to 85°C. The component is housed in a surface-mount SOT-23 package.

Voltage Reference Feature Summary

• Two-terminal adjustable shunt regulation architecture
• Integrated low-drift bandgap reference core
• High thermal stability over extended industrial temperature ranges

Voltage Reference Applications

• Precision voltage regulation circuits
• Portable equipment power management
• Battery-powered system monitoring

Voltage Reference Procurement Notes

Verify the specific suffix 'AIM' against official National Semiconductor or Texas Instruments documentation to confirm pinout compatibility and electrical specifications. Ensure the source document explicitly lists this part number, as generic LM431 data may not reflect the exact performance characteristics of the AIM variant. Cross-reference datasheets for any manufacturing transitions between National Semiconductor and Texas Instruments.

Voltage Reference Selection Notes

Select the LM431AIM when a compact surface-mount solution is required for adjustable voltage referencing applications. Consider its 100 mA current drive capability and low temperature coefficient for designs demanding stable reference voltages under varying thermal conditions. Verify that the SOT-23 package dimensions align with the target PCB layout constraints.

Voltage Reference Part Context

This component belongs to the LM431 family of adjustable shunt voltage references originally developed by National Semiconductor. Following the acquisition of National Semiconductor's analog business by Texas Instruments, these parts are now managed under the TI portfolio. The LM431 series serves as a versatile alternative to Zener diodes, offering superior accuracy and lower dynamic impedance for precision analog circuit design.

Voltage Reference Replacement Considerations

LM431ACZ/LFT7

Voltage Reference FAQ

What is the minimum operating voltage for the LM431AIM?

The device requires a minimum cathode-to-anode voltage of approximately 2.5 V to maintain regulation.

Does the LM431AIM include internal frequency compensation?

Yes, the LM431AIM incorporates internal frequency compensation to ensure stability when driving capacitive loads.