MAX8939AEWV+T

Overview

The MAX8939AEWV+T is a battery charger IC from the MAX8939A series, designed for single-cell lithium-ion and lithium-polymer batteries. It features an integrated power switch to minimize external component count. The device supports input voltages up to 6.5V and provides programmable charge current. It includes JEITA-compliant thermal regulation and battery temperature monitoring using an external thermistor. The part operates within a junction temperature range of -40°C to +125°C and is available in a 30-bump Wafer-Level Package.

Feature Summary

• Integrates a high-efficiency synchronous buck converter with an internal power switch for compact designs.
• Supports JEITA battery temperature monitoring standards for safe charging across varying environmental conditions.
• Features automatic recharge capability that resumes charging when battery voltage drops below the threshold.

Applications

• Portable electronic devices requiring single-cell Li-ion or Li-Po battery management
• Mobile phones and smartphones
• Personal digital assistants (PDAs)
• GPS navigation units

Procurement Notes

Verify the specific suffix 'EWV' corresponds to the required WLP-30 package variant during sourcing. Confirm RoHS compliance status via the manufacturer's official documentation. Ensure the ordering part number matches the exact tape-and-reel quantity specified in the datasheet to avoid packaging discrepancies.

Selection Notes

Select this component for applications prioritizing minimal board space due to the integrated switch and small WLP footprint. It is suitable for systems requiring precise thermal management through external thermistor inputs. Consider alternative packages if the WLP-30 form factor does not align with existing PCB layout constraints.

Part Context

This component belongs to the Maxim Integrated MAX8939A family of single-cell battery chargers. The family is characterized by high integration levels and support for standard lithium-ion chemistries. Analog Devices acquired Maxim Integrated, making this part part of their broader portfolio of power management solutions for mobile electronics.

Replacement Considerations

Check for direct pin-compatible upgrades within the MAX8939A series. Verify functional equivalence regarding input voltage ranges and thermal protection thresholds before substituting with other single-cell charger ICs.