MAX6429MRUR

Overview

The MAX6429MRUR is a low-power, single-level battery monitor with internal hysteresis manufactured by Analog Devices Inc. (Maxim Integrated). It operates within a supply voltage range of 1V to 6V and draws a typical quiescent current of 1µA. The device features a factory-trimmed low-battery output threshold and includes a minimum 140ms timeout period to ensure stable logic states before enabling system activity. It is housed in a compact SOT-23-3 surface-mount package suitable for portable applications.

Feature Summary

• Provides a single low-battery output indicator with internal hysteresis to prevent false triggering.
• Includes a guaranteed 140ms minimum timeout period to allow supply voltages to stabilize.
• Features a push-pull low-battery output capable of driving loads directly.

Applications

• Monitoring single lithium-ion cells
• Monitoring multicell alkaline power supplies
• Monitoring NiCd/NiMH battery packs

Procurement Notes

Verify the specific suffix 'MRUR' against official manufacturer documentation to confirm the exact threshold voltage and package variant. Confirm RoHS compliance status and moisture sensitivity level requirements prior to integration into the design flow.

Selection Notes

Select this component when a single low-battery warning is sufficient for the application. Compare against dual-output variants if multiple battery state indicators are required. Ensure the factory-trimmed threshold aligns with the specific battery chemistry's discharge curve.

Part Context

This part belongs to the MAX6427–MAX6438 family of low-power battery monitors. These devices are designed to indicate three battery conditions: good, weak, or empty. The MAX6429 specifically offers a single low-battery output option within this series.

FAQ

What is the purpose of the 140ms timeout period?

The timeout ensures that supply voltages have stabilized before power-converter or microprocessor activity is enabled, preventing erratic behavior during startup.

Can the MAX6429 monitor multi-cell batteries?

Yes, it is ideal for monitoring multicell alkaline, NiCd, or NiMH power supplies in addition to single lithium-ion cells.