MAX6428ORUR

Overview

The MAX6428ORUR is a low-power, single-level battery monitor with internal hysteresis. It operates within a supply voltage range of 1.7V to 5.5V and consumes only 3µA of quiescent current. The device features an active-low open-drain output that asserts when the input voltage drops below a specified threshold. It includes a minimum timeout period to ensure supply stabilization before system activity resumes. The component is housed in a compact SOT-23-3 package and supports operation across temperatures from -40°C to +85°C.

Feature Summary

• Provides low-battery indication for monitoring single lithium-ion or multicell alkaline/NiCd/NiMH power supplies
• Features internal hysteresis to prevent output oscillation during voltage transitions
• Includes a minimum timeout period to ensure supply voltages stabilize before enabling system activity

Applications

• Monitoring single lithium-ion (Li+) cells
• Monitoring multicell alkaline power supplies
• Monitoring NiCd/NiMH power supplies

Procurement Notes

Verify the specific suffix 'OR' against official Analog Devices documentation to confirm the exact threshold voltage and tolerance. Confirm RoHS compliance status and lead times directly with authorized distributors, as availability may vary by region. Ensure the SOT-23-3 package matches your PCB footprint requirements.

Selection Notes

Select this component for applications requiring ultra-low standby current and reliable battery level detection. The fixed threshold simplifies design compared to adjustable monitors. Consider the 3µA quiescent current impact on total system power budget. Verify that the open-drain output configuration aligns with the downstream logic interface requirements.

Part Context

The MAX6428 belongs to the MAX6427–MAX6438 family of low-power battery monitors. This series offers various threshold options and packaging configurations to suit different portable electronic designs. The family provides single or dual-level indicators to manage normal, low-power, and disabled system states based on battery health.

Replacement Considerations

Check the MAX6427, MAX6429, MAX6433, MAX6434, and MAX6435 for alternative threshold voltages within the same family. Verify package compatibility if substituting with other SOT-23-3 variants.