SPX431LCN-L

Overview

The SPX431LCN-L is a three-terminal adjustable shunt voltage regulator manufactured by Sipex, now part of Maxlinear. It functions as a precision parallel voltage reference with an integrated temperature-compensated bandgap reference of approximately 2.5V. The device incorporates an open-loop error amplifier to maintain stable regulation. It supports a wide operating current range up to 100mA and offers high thermal stability across its operational temperature range. The component is housed in an 8-pin SOIC package (PDSO8) and provides an adjustable output voltage capability when configured with external resistors.

Feature Summary

• Integrates a temperature-compensated bandgap reference for precise voltage regulation
• Features an open-loop error amplifier for high gain and stability
• Supports wide operating current ranges suitable for various load conditions
• Provides adjustable output voltage functionality via external resistor networks

Applications

• Precision voltage references in analog circuits
• Adjustable power supply regulators
• Comparator reference sources
• Battery charging control circuits

Procurement Notes

Verify the manufacturer designation, as Sipex was acquired by Exar and subsequently Maxlinear. Confirm the specific suffix indicates the correct package type and lead-free status. Ensure compatibility with existing board layouts regarding the SOIC-8 footprint. Check for RoHS compliance documentation if required for your assembly process. Validate that the sourcing channel is an authorized distributor to guarantee component authenticity.

Selection Notes

Select this component when a low-cost, adjustable shunt regulator is required instead of a fixed reference. Consider the 100mA current capability against your maximum load requirements. Evaluate the thermal performance needs given the SOIC-8 package size. Compare against standard TL431 equivalents if pinout or specific electrical characteristics differ slightly. Ensure the input voltage range accommodates the desired output adjustment range.

Part Context

This device belongs to the SPX431 family of programmable shunt regulators. It serves as a direct functional replacement for industry-standard adjustable references like the TL431. The product line emphasizes cost-effective solutions for voltage regulation tasks in consumer and industrial electronics. Sipex's expertise in mixed-signal design ensures reliable performance in compact form factors.

Replacement Considerations

The SPX431LCN-L is functionally equivalent to the TL431A and similar adjustable shunt regulators. Verify pin compatibility before substitution. Check if the alternative part meets the same thermal and current specifications. Ensure the replacement maintains the required accuracy and temperature coefficient for the application.