AAT3663IWO-8.4-1-T1

Overview

The AAT3663IWO-8.4-1-T1 is a linear lithium-ion battery charger manufactured by Skyworks Solutions Inc. It supports two-cell lithium-ion or lithium-polymer battery chemistries. The device provides a constant charging current of 1A and targets an output voltage of 8.4V. It features programmable charge current control and integrates protection mechanisms including over-current, over-temperature, over-voltage, and short-circuit safeguards. The component is housed in a 14-TDFN (3x3) surface-mount package.

Feature Summary

• Supports charging for two-cell lithium-ion and lithium-polymer battery configurations
• Integrates comprehensive safety protections against over-current, over-temperature, over-voltage, and short circuits
• Allows for programmable constant charge current adjustment

Applications

• Portable electronic devices requiring dual-cell battery power
• Lithium-ion polymer battery management systems
• Consumer electronics with linear charging requirements

Procurement Notes

Verify the exact suffix and package type when sourcing to ensure compatibility with design specifications. Confirm end-of-life status and availability through authorized distributors as supply may be limited. Cross-reference datasheet revisions to ensure feature consistency. Validate thermal performance requirements for the specific application environment before finalizing procurement decisions.

Selection Notes

Select this component for applications requiring a linear charging solution for two-cell lithium batteries. Ensure the input voltage range accommodates the source supply while maintaining dropout voltage margins. Verify that the thermal dissipation capabilities of the 14-TDFN package suit the PCB layout and ambient temperature conditions. Compare against switching regulators if efficiency is critical, as linear chargers dissipate excess energy as heat.

Part Context

This part belongs to Skyworks' AAT3663 series of linear battery chargers. It is distinct from single-cell variants like the AAT3620 and other current ratings within the family. The IWO suffix indicates the industrial temperature range and TDFN package style. It serves as a dedicated power management IC for safe and controlled charging of multi-cell lithium-based battery packs in compact form factors.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Skyworks Solutions directly for recommended alternatives or updated components if discontinuation is confirmed.