MAX6429AIUR+T

Overview

The MAX6429AIUR+T is a low-power, single-level battery monitor with internal hysteresis, manufactured by Analog Devices Inc. under the Maxim Integrated brand. It operates within a supply voltage range of 1.0V to 6.0V and consumes typical quiescent current of 1µA. The device features a factory-trimmed low-battery output threshold of 2.85V with a high threshold of 3.15V. It provides a push-pull low-battery output (LBO) and includes a minimum timeout period of 140ms to ensure supply voltage stabilization before enabling power-converter or microprocessor activity. The component is housed in a compact SOT-23-3 surface-mount package.

Feature Summary

• Provides single low-battery output indication for monitoring battery conditions
• Includes internal hysteresis to prevent output oscillation during voltage transitions
• Features a guaranteed valid LBO logic state down to 1.0V supply voltage
• Offers a minimum timeout period to stabilize supply voltages before system activation

Applications

• Monitoring single lithium-ion cells
• Monitoring multicell alkaline power supplies
• Monitoring NiCd/NiMH power supplies
• Indicating weak battery status for low-power mode operation

Procurement Notes

Verify the specific suffix 'AIUR' against official documentation to confirm the exact threshold voltage and package type, as variations exist within the family. Confirm RoHS compliance status and lead times directly with authorized distributors. Ensure the ordering part number matches the required threshold specifications for the target application design.

Selection Notes

Select this component when a fixed, factory-trimmed threshold is preferred over user-adjustable options. It is suitable for applications requiring minimal external components and low standby current. Consider the SOT-23-3 package size constraints and the specific 2.85V/3.15V thresholds relative to the battery chemistry being monitored.

Part Context

This part belongs to the MAX6427–MAX6438 family of single/dual-level battery monitors. Unlike the MAX6433–MAX6438 series which offer user-adjustable thresholds, the MAX6427–MAX6432 series utilizes factory-trimmed thresholds. The MAX6429 specifically provides a single low-battery output indicator, distinguishing it from dual-output variants in the same family.

Replacement Considerations

Compatible substitutes within the same family include MAX6427, MAX6428, MAX6430, MAX6431, MAX6433, MAX6434, MAX6435, MAX6436, MAX6437, and MAX6438, provided their respective threshold voltages and output configurations match the design requirements.