MAX6129BEUK30+T

Overview

The MAX6129BEUK30+T is a micropower, low-dropout bandgap voltage reference in a 5-pin SOT-23 package. It provides a fixed 3V output with ±1% initial accuracy and a maximum temperature coefficient of 100ppm/°C. The device operates on a supply voltage range of 3.2V to 12.6V, drawing a maximum supply current of 6.75µA. It features a dropout voltage of 200mV at 4mA source current and supports up to 4mA sourcing and 1mA sinking load currents.

Feature Summary

• Ultra-low power consumption suitable for battery-operated systems
• Miniature surface-mount package reduces board space requirements
• Internal compensation ensures stability without external capacitors
• Low dropout voltage enables operation near minimum supply levels

Applications

• Battery-powered systems
• Handheld instruments
• Precision power supplies
• A/D and D/A converters

Procurement Notes

Verify the component grade suffix 'B' corresponds to the required ±1% accuracy specification rather than the higher precision 'A' grade. Confirm the 'EUK30' designation matches the specific 3.0V output requirement. Ensure the '+T' suffix indicates tape-and-reel packaging if automated assembly is planned. Cross-reference the manufacturer's latest datasheet revision to confirm pinout and electrical characteristics remain unchanged.

Selection Notes

Select this part when a fixed 3V reference is needed with minimal quiescent current draw. The B-grade variant offers cost-effective accuracy for applications tolerating ±1% deviation. Consider the 100ppm/°C drift rate against the operating temperature range to ensure total error remains within system limits. Verify that the input voltage stays above the 3.2V minimum to maintain regulation under all load conditions.

Part Context

This component belongs to the MAX6129 family of ultra-low-power series voltage references manufactured by Analog Devices / Maxim Integrated. The family includes variants with different output voltages and accuracy grades (A and B). The BEUK30 suffix specifically identifies the B-grade version with a 3.0V output in the SOT-23-5 package.

Replacement Considerations

Direct substitutes include other MAX6129 variants such as MAX6129AEUK30+T for higher accuracy or MAX6129BEUK33+T for a 3.3V output. Ensure any replacement maintains the SOT-23-5 footprint and compatible electrical specifications for supply current and dropout voltage.