LMV431CM5X

Voltage Reference Overview

The LMV431CM5X is a low-voltage adjustable precision shunt regulator manufactured by Texas Instruments, formerly National Semiconductor. It operates with an output voltage range of 1.24 V to 30 V and supports a maximum shunt current of 15 mA. The device features an initial accuracy of 1.5% and a temperature coefficient of 138 PPM/°C. It is housed in a 5-pin SOT-23 surface-mount package and functions within a temperature range of -40°C to +85°C.

Voltage Reference Feature Summary

• Provides adjustable precision voltage reference functionality via two-terminal operation
• Designed for low-voltage applications with wide output voltage adjustability
• Offers stable regulation performance across specified industrial temperature ranges

Voltage Reference Applications

• Portable equipment power supplies
• Battery-powered systems requiring precise voltage references
• General-purpose shunt regulation circuits

Voltage Reference Procurement Notes

Verify the manufacturer designation carefully, as the component originates from National Semiconductor but is now distributed under Texas Instruments branding. Confirm the specific suffix 'CM5X' corresponds to the SOT-23 5-pin tape-and-reel packaging configuration. Ensure RoHS compliance status matches project requirements, noting that 'NOPB' variants explicitly denote lead-free construction while standard suffixes may vary.

Voltage Reference Selection Notes

Select this component when a compact, low-cost adjustable shunt regulator is required for space-constrained designs. The SOT-23 package facilitates automated surface-mount assembly. Consider the 1.24 V internal reference voltage as the minimum output setting. Evaluate thermal management needs based on the 15 mA maximum current capability and the specified operating temperature limits for the intended environment.

Voltage Reference Part Context

This part belongs to the LMV431 family of low-voltage adjustable precision shunt regulators. It serves as a direct replacement for traditional Zener diodes in voltage reference and regulation roles. The device integrates a bandgap reference and error amplifier to achieve high stability. It is widely used in consumer electronics and industrial control systems where small form factor and low power consumption are critical design constraints.

Voltage Reference Replacement Considerations

Compatible substitutes include LMV431ACM5X/NOPB and LMV431BCM5X/NOPB. These variants share identical pinouts and electrical characteristics but differ in initial accuracy specifications. Verify package compatibility and ensure the substitute meets the specific accuracy and temperature coefficient requirements of the original design.