MAX6429EGUR+T

Overview

The MAX6429EGUR+T is a low-power, single-level battery monitor with internal hysteresis from the Maxim Integrated family. It operates within a supply voltage range of 1.6V to 5.5V and consumes typical current of 1µA. The device features factory-trimmed thresholds, specifically a low threshold of 2.0V and a high threshold of 2.3V in this variant. It provides a push-pull low-battery output (LBO) that asserts when voltage drops below the low threshold and deasserts after rising above the high threshold for a minimum timeout period of 140ms. The component is housed in a compact SOT-23-3 package.

Feature Summary

• Provides single low-battery output indication with internal hysteresis to prevent output chatter during voltage transitions.
• Features factory-trimmed monitoring thresholds for precise detection without requiring external resistor networks.
• Includes a guaranteed minimum timeout period to ensure supply voltages stabilize before enabling power-converter or microprocessor activity.

Applications

• Monitoring single lithium-ion cells in portable electronic devices.
• Monitoring multicell alkaline, NiCd, or NiMH power supplies.
• Indicating battery conditions such as good, weak, or empty states for system mode switching.

Procurement Notes

Verify the specific suffix 'E' corresponds to the required 2.0V/2.3V threshold configuration against the manufacturer's official part numbering guide. Confirm RoHS compliance status and lead times directly with authorized distributors, as availability may vary by region. Ensure the SOT-23-3 package footprint matches the design requirements.

Selection Notes

Select this component when a single low-battery indicator with fixed, factory-calibrated thresholds is required. It is suitable for applications needing minimal quiescent current and a push-pull output interface. Consider alternative variants if user-adjustable thresholds or dual-output indicators are necessary for the specific system architecture.

Part Context

This device belongs to the MAX6427–MAX6438 series of low-power battery monitors. The series offers both single and dual-level output options in small packages. While other variants provide user-adjustable thresholds via external resistors, this specific model utilizes factory-trimmed values for simplified implementation and consistent performance across temperature ranges.

Replacement Considerations

Direct pin-compatible substitutes within the same family include MAX6427 and MAX6428, provided their specific factory-trimmed threshold voltages align with the system design requirements. Verify electrical characteristics and package dimensions before substitution.