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Product Detailed Parameters
- Description：IC BATT CHG LI-ION 1CELL 24QFN
- Series：-
- Mfr：Skyworks Solutions Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Battery Chemistry：Lithium Ion/Polymer
- Voltage - Supply (Max)：5.5V
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：24-VFQFN Exposed Pad
- Supplier Device Package：24-QFN (4x4)
- Number of Cells：1
- Current - Charging：Constant - Programmable
- Programmable Features：Current
- Fault Protection：Over Current, Over Temperature, Over Voltage, Short Circuit
- Charge Current - Max：1.6A
- Battery Pack Voltage：4.2V
- Interface：USB
- Grade：-
- Qualification：-
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Overview
The AAT3670ISK-4.2-T1 is a dynamic battery charger and power manager manufactured by Skyworks Solutions, Inc. It supports input voltages from 4.5 V to 28 V and delivers up to 1.6 A of charging current for single-cell lithium-ion or lithium-polymer batteries. The device features an integrated 4-A synchronous step-down converter with adjustable output voltage. It operates within a temperature range of -40°C to +85°C and is housed in a 24-pin QFN package.
Feature Summary
- Integrates a high-efficiency synchronous buck converter capable of delivering up to 4 A for system power management
- Supports dynamic power path management to prioritize system load over battery charging when input current is limited
- Includes programmable charge termination and thermal regulation to ensure safe operation under varying conditions
Applications
- Portable computing devices such as tablets and laptops
- Mobile communication handsets requiring combined charging and system power
- Industrial handheld equipment with external power adapter inputs
Procurement Notes
This component is officially discontinued and no longer manufactured by Skyworks Solutions. Verification of availability should focus on authorized distributors offering remaining stock or approved substitute components. Ensure any replacement part matches the original electrical specifications and pinout compatibility before integration into existing designs.
Selection Notes
Select this component only if legacy design compatibility is required. For new designs, consider modern equivalents that offer improved efficiency or extended supply availability. Verify that the input voltage range and output current requirements align with the specific application needs, as the integrated buck converter shares the same input source as the charger.
Part Context
The AAT3670 belongs to Skyworks' portfolio of integrated power management solutions designed for portable electronics. It combines battery charging and DC-DC conversion functions to reduce board space and component count. The device is part of a broader family of PMICs aimed at simplifying power architecture in mobile and industrial applications.
Replacement Considerations
Publicly confirmed substitutes include the BQ24295RGET. Verify functional equivalence regarding input voltage range, output current capabilities, and package dimensions before adoption.
