SPX432M-L

Overview

The SPX432M-L/TR is a precision adjustable shunt voltage regulator manufactured by MaxLinear, Inc. It provides a highly accurate 1.24V bandgap reference with an initial tolerance of ±1%. The device supports an output voltage range from 1.24V to 18V and handles a maximum shunt current of 80mA. It operates within a temperature range of 0°C to +105°C and features a low temperature coefficient of 50ppm/°C. The component is housed in a compact SOT-23-3 surface-mount package.

Feature Summary

• Provides a stable 1.24V internal bandgap reference for precise regulation
• Supports wide operating current range up to 80mA for robust load handling
• Offers high thermal stability across industrial temperature ranges

Applications

• Precision analog circuit voltage references
• Adjustable power supply feedback loops
• Comparator reference voltage generation

Procurement Notes

Verify the manufacturer designation as MaxLinear, Inc., noting historical lineage from Exar Corporation. Confirm the specific suffix L/TR indicates the SOT-23-3 package and tape-and-reel packaging format. Ensure compliance with RoHS standards and check for any relevant Product Change Notices regarding manufacturing site or material composition updates before final procurement.

Selection Notes

Select this component when a low-cost, high-current adjustable shunt regulator is required. The 80mA capability distinguishes it from lower-current alternatives suitable for driving heavier loads. The SOT-23-3 package offers space efficiency for dense PCB layouts. Verify that the input voltage exceeds the desired output voltage plus the dropout requirement for proper regulation operation.

Part Context

This part belongs to the SPX432 series of precision shunt regulators. It serves as a two-terminal device alternative to fixed voltage references, allowing designers to set output voltages via external resistors. The series is widely used in general-purpose power management applications requiring stable reference points.

Replacement Considerations

Check for direct pin-compatible substitutes within the same family, such as other SPX432 variants with different tolerances or packages. Verify electrical parameters against competitors like LM431 or TL431 equivalents if sourcing from different manufacturers.