The ACT8942QJ233 is a highly integrated ActivePMU™ power management unit (PMU) from Active-Semi International Inc. It is designed to provide a complete power solution for a wide range of applications including portable devices, wearables, and IoT devices. This PMU integrates multiple power rails, battery charging, and system monitoring functions into a single chip, simplifying design and reducing the overall solution size.

Applications

• Smartphones and tablets
• Wearable devices (smartwatches, fitness trackers)
• IoT devices
• Portable media players
• Handheld gaming consoles

Features

• Multiple DC-DC Buck Converters: Provides efficient power conversion for various system voltages.
• Integrated LDOs: Offers low-noise, regulated voltage rails for sensitive analog and digital circuits.
• Battery Charger: Supports single-cell Li-ion/Li-Polymer battery charging with programmable charging parameters.
• Fuel Gauge: Provides accurate battery capacity monitoring.
• I2C Interface: Allows for easy configuration and monitoring of the PMU.
• Protection Features: Includes over-voltage, over-current, and over-temperature protection.

Benefits

• Simplified System Design: Integration of multiple power functions reduces the number of external components.
• High Efficiency: DC-DC converters and LDOs are optimized for high efficiency, extending battery life.
• Small Solution Size: Highly integrated package minimizes the PCB footprint.
• Programmable Parameters: I2C interface allows for flexible configuration to meet specific application requirements.
• Robust Protection: Comprehensive protection features ensure system reliability.

Technical Specifications

The ACT8942QJ233 PMU includes the following key specifications:

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: Configurable based on DC-DC and LDO settings
• Charging Current: Programmable up to 2A
• Operating Temperature Range: -40°C to +85°C
• Package: QFN
• I2C Address: Configurable

The device's multiple DC-DC buck converters allow for delivering power to different voltage domains within a device while maintaining high efficiency. Its integrated LDOs ensure quiet power for sensitive circuits, improving overall performance. The I2C interface provides the flexibility to dynamically adjust power settings, optimizing the device’s performance based on real-time conditions.