AAT3681AIJS-4.2-1-T1

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The AAT3681AIJS-4.2-1-T1 is an application specific integrated circuit (ASIC) from Skyworks Solutions Inc. designed to be used as a battery charger in portable electronics.

It is part of the PMIC (power management IC) family and is specifically designed to provide a low-cost, single-input solution that is highly power-efficient with a very small form factor. It offers several features such as a wide input voltage range, adjustable fast charge current limit, voltage regulation, charge-status indication, and overtemperature protection.

The AAT3681AIJS-4.2-1-T1 is a linear Li-ion battery charger with one series of cells connected between its input and ground terminal. It is designed to operate from an input voltage of 2.7V to 7V, providing an adjustable fast charge current limit up to 600mA with 0.5mA resolution and voltage regulation of 4.2V +/- 5% accuracy.

The AAT3681AIJS-4.2-1-T1 has two dedicated pins that allow an external system to monitor the status of the battery charge process—Co (charge-progress) and Done (battery charge done).

The AAT3681AIJS-4.2-1-T1 also features internal thermal regulation, providing a safe and efficient power management system. It is protected from faults by latch-off behavior, further safeguarding both the device and the battery from disconnects or other hazards.

The device is available in a 4x4x0.75mm 16-pin TQFN package, resulting in a minimal footprint and low system cost. The low-profile package is also RoHS compliant, making it an ideal choice for portable electronics.

Overall, the AAT3681AIJS-4.2-1-T1 is an ideal choice for linear Li-ion battery charging applications in portable electronics. It provides a high level of performance in a low-cost, highly efficient, and very small form factor, while offering several features such as adjustable fast charge current limit, voltage regulation, charge-status indication, and overtemperature protection.

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