MAX6429MRUR-T

Overview

The MAX6429MRUR-T is a low-power, single-level battery monitor from the MAX6427–MAX6438 family. It operates within a supply voltage range of 1.6 V to 5.5 V and consumes typical quiescent current of 1 µA. The device features factory-trimmed thresholds with a low threshold of 2.6 V to 3.1 V and a high threshold of 3.3 V to 3.6 V in 100 mV increments. It provides an open-drain low-battery output (LBO) with internal hysteresis and a minimum 140 ms timeout period. Packaged in a SOT-23-3 case, it functions reliably over an operating temperature range of -40°C to +85°C.

Feature Summary

• Provides single low-battery output indication for monitoring power supply status
• Features internal hysteresis to prevent output chatter during voltage transitions
• Includes a minimum 140 ms timeout period to ensure supply stabilization before enabling system activity
• Guarantees valid LBO logic state down to a supply voltage of 1.0 V

Applications

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

Procurement Notes

Verify the exact suffix configuration against the manufacturer datasheet, as ordering codes may vary by packaging or revision. Confirm availability status, as this component may be subject to discontinuation or limited supply constraints. Ensure the selected variant matches the required threshold specifications and package type for your specific design implementation.

Selection Notes

Select this component when a fixed, factory-trimmed low-battery threshold is preferred over user-adjustable options. It is suitable for designs requiring minimal external components and low standby current consumption. Consider the SOT-23-3 package size for space-constrained applications. Verify that the specified threshold ranges align with the target battery chemistry's discharge characteristics.

Part Context

This part belongs to the MAX6427–MAX6438 series of low-power battery monitors. The series includes variants with single or dual low-battery outputs and offers both factory-trimmed and user-adjustable threshold options. These devices are designed to indicate three battery conditions: good, weak, or empty, facilitating appropriate system mode switching.

Replacement Considerations

Other members of the MAX6427–MAX6438 family may serve as replacements if threshold requirements differ. Variants such as MAX6427, MAX6428, MAX6433, MAX6434, or MAX6435 offer alternative fixed or adjustable thresholds. Dual-output versions like MAX6430–MAX6432 provide additional monitoring capabilities.