FAN5403BUCX

Battery Chargers Overview

The FAN5403BUCX is a USB-compliant single-cell lithium-ion switching charger IC manufactured by Fairchild Semiconductor, now part of ON Semiconductor. It operates with an input voltage up to 6 V and provides an adjustable output current ranging from 550 mA to 1.25 A. The device supports output voltages between 3.5 V and 4.4 V. It is housed in a compact 20-ball WLCSP package measuring 1.96 x 1.56 mm.

Battery Chargers Feature Summary

• USB-compliant charging management for single-cell lithium-ion and lithium-polymer batteries
• Switching regulator architecture for improved efficiency
• Surface-mount design for structural stability

Battery Chargers Applications

• Portable electronic devices requiring USB charging
• Single-cell lithium-ion battery systems
• Lithium-polymer battery management applications

Battery Chargers Procurement Notes

Verify the manufacturer status carefully as Fairchild Semiconductor has been integrated into ON Semiconductor. Confirm if the specific part number requires an underscore-to-dash nomenclature update (e.g., FAN5403-BUCX) to meet current system requirements. Check datasheets for updated ordering information and ensure compatibility with existing supply chains post-integration.

Battery Chargers Selection Notes

Select this component for applications requiring a compact, USB-compatible solution for single-cell Li-Ion or Li-Po batteries. The WLCSP package suits space-constrained designs. Ensure the input supply does not exceed 6 V and that the required charge current falls within the 550 mA to 1.25 A range. Verify thermal performance given the small form factor.

Battery Chargers Part Context

This device belongs to the FAN5403 series of battery chargers. It is functionally similar to the FAN54013BUCX but may differ in specific electrical parameters such as maximum output current. The part was originally produced by Fairchild Semiconductor before its acquisition by ON Semiconductor, leading to potential naming convention changes in official documentation.

Battery Chargers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Users should consult ON Semiconductor's official cross-reference tools or datasheets for verified alternatives following the Fairchild integration.