MAX6429DIUR+T

Overview

The MAX6429DIUR+T is a low-power, single-level battery monitor manufactured by Analog Devices Inc. under the Maxim Integrated brand. It operates within a supply voltage range of 1 V to 5.5 V and is housed in an SOT-23-3 surface-mount package. The device functions as a power supply support circuit with a typical quiescent current of 1 µA. It provides a low-battery output (LBO) that asserts when the input voltage drops below a factory-trimmed threshold, ensuring reliable monitoring for single lithium-ion or multicell alkaline/NiCd/NiMH power supplies.

Feature Summary

• Single low-battery output indicator for detecting weak battery conditions
• Internal hysteresis prevents output oscillation during voltage transitions
• Minimum timeout period ensures supply voltage stabilization before system activation

Applications

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

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for end-of-life notifications prior to procurement. Ensure the specific suffix matches the required threshold voltage and package type. Request official datasheets and test reports to validate performance specifications against design requirements.

Selection Notes

Select this component for applications requiring minimal quiescent current and compact footprint. Choose based on the specific factory-trimmed threshold voltage needed for the target battery chemistry. Consider the SOT-23-3 package for space-constrained designs. Evaluate the internal hysteresis and timeout features for noise immunity and stable operation in low-power systems.

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 with factory-trimmed thresholds, distinguishing it from user-adjustable variants in the same series. It is categorized under PMIC - Power Management ICs.

Replacement Considerations

Compatible substitutes within the same family include MAX6427, MAX6428, MAX6430, MAX6431, and MAX6432. Verify that alternative parts match the required threshold voltage, package type, and output configuration.