LM431CIM/NOPB

Voltage Reference Overview

The LM431CIM/NOPB is an adjustable precision Zener shunt regulator manufactured by Texas Instruments. It operates within a voltage range of 2.495 V to 37 V and features an initial accuracy of 0.5%. The device supports a maximum shunt current of 100 mA with a temperature coefficient of 97 ppm/°C. It functions across a minimum operating temperature of -40°C and a maximum of +85°C. The component utilizes a SOT-23-3 surface-mount package.

Voltage Reference Feature Summary

• Provides adjustable precision reference voltage functionality via shunt regulation architecture
• Ensures stable performance through specified initial accuracy and temperature coefficient characteristics
• Supports high current handling capabilities suitable for diverse power management applications

Voltage Reference Applications

• Precision voltage reference circuits requiring adjustable output levels
• Power supply feedback loops for voltage regulation
• Comparator circuits utilizing internal reference thresholds

Voltage Reference Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free compliance and RoHS adherence as per Texas Instruments standards. Confirm the SOT-23-3 package type matches the target PCB footprint requirements. Ensure the 0.5% accuracy grade meets the design specifications for the intended application environment. Cross-reference the datasheet for any updates regarding pinout or thermal characteristics.

Voltage Reference Selection Notes

Select this component when an adjustable precision reference is required in a compact surface-mount form factor. The 0.5% initial accuracy makes it suitable for applications demanding tighter tolerance than standard fixed references. Consider the 100 mA shunt current limit when designing load conditions. The wide input voltage range up to 37 V offers flexibility in various supply configurations.

Voltage Reference Part Context

This part belongs to the LM431 series of adjustable precision Zener shunt regulators from Texas Instruments. It serves as a drop-in replacement for traditional Zener diodes, offering superior stability and adjustability. The NOPB suffix denotes a non-pb (lead-free) version compliant with environmental directives. The SOT-23-3 package allows for space-efficient designs in portable and industrial electronics.

Voltage Reference Replacement Considerations

LM431CIM3/NOPB is a verified equivalent variant within the same family.