ACT8945AQJ305-T

Overview

The ACT8945AQJ305-T is a specialized Power Management IC (PMIC) designed for advanced processor applications. It integrates three step-down DC/DC converters and four low-noise, low-dropout (LDO) regulators. The device includes a complete battery charging solution with ActivePath technology. It operates within an input voltage range of 2.7 V to 5.5 V. Output currents for the DC/DC converters range from 0.32 A to 1.2 A. The component is housed in a 40-pin TQFN package measuring 5x5 mm. It supports I2C and USB interfaces for control and communication.

Feature Summary

• Integrates three buck converters and four LDOs for comprehensive power distribution
• Includes ActivePath battery charging solution for optimized energy management
• Features low-noise regulators suitable for sensitive analog and RF circuits
• Supports I2C and USB interfaces for system control

Applications

• Advanced processor power management systems
• Portable computing devices requiring integrated power solutions
• Systems utilizing Atmel processors or similar architectures
• Battery-powered equipment needing efficient charge management

Procurement Notes

Verify the specific suffix 'T' indicates tape and reel packaging when ordering. Confirm the 'AQJ' designation aligns with required automotive or industrial qualification standards if applicable. Ensure the 40-TQFN footprint matches the target PCB layout. Cross-reference the datasheet revision date to confirm interface compatibility. Validate that the 5.5 V maximum input voltage suits the system's power source.

Selection Notes

Select this PMIC for designs requiring a compact, multi-rail power solution. It is suitable for applications needing both high-efficiency switching regulation and clean LDO outputs. Consider the 40-pin package size for space-constrained boards. Evaluate the integrated charger functionality against external charging requirements. Ensure the I2C address configuration meets system bus constraints.

Part Context

This component belongs to Qorvo's Advanced PMU series, specifically tailored for complex processor systems. It consolidates multiple power stages into a single chip to reduce board space. The ACT8945 series typically targets high-performance mobile and embedded applications. It replaces discrete regulator and charger combinations found in older designs.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.