MAX6129BEUK33+T

Overview

The MAX6129BEUK33+T is a micropower, low-dropout bandgap voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed output voltage of 3.3V with an initial accuracy of ±1% and a maximum temperature coefficient of 100 ppm/°C. The device operates within a supply voltage range of 3.5V to 12.6V and features ultra-low supply current. It is housed in a miniature 5-pin SOT-23 surface-mount package.

Feature Summary

• Ultra-low power consumption suitable for battery-operated systems
• Miniature 5-pin SOT23 package reduces board space requirements
• Internal compensation ensures stability without external capacitors
• Low dropout voltage enables operation near the output level

Applications

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

Procurement Notes

Verify the specific suffix 'B' indicates the ±1% accuracy grade and 'EUK33' denotes the 3.3V output variant. Confirm the '+T' suffix corresponds to tape-and-reel packaging if required for automated assembly. Ensure the component matches the manufacturer's latest datasheet specifications regarding pin configuration and absolute maximum ratings before integration.

Selection Notes

Select this component when a stable 3.3V reference is needed with minimal board space constraints. The B-grade offers standard precision suitable for general applications, while the A-grade provides tighter tolerances. Consider the input voltage range relative to the desired output to ensure sufficient headroom above the dropout voltage under load conditions.

Part Context

This part belongs to the MAX6129 family of ultra-low-power series voltage references. The family includes variants with different output voltages (2.048V, 2.5V, 3V, 3.3V, 4.096V, 5V) and accuracy grades (A and B). All variants share the same low-power architecture and SOT-23-5 package form factor.

Replacement Considerations

Direct replacements include other MAX6129 variants such as MAX6129AEUK33+T for higher accuracy or MAX6129BEUK30+T for a 3.0V output. Cross-family replacements require matching the SOT-23-5 package, output voltage, and supply current characteristics.